Basic Tanker Operations Practice Test

These questions are part of the practice quiz. Start practicing

• What unit of volume is used to measure oil capacity?
• What is the auto ignition temperature?
• In a properly inerted system, what is the maximum allowed oxygen concentration?
• On a double hull ship, ballast water is permitted only in which tanks?
• PPE use is only required by crew members drawing samples or sitting near open tank hatches.
• Short-Term Exposure Limit (STEL) refers to which of the following?
• MARPOL 73/78 Annex II has four pollution categories (X, Y, Z, and Other) and 3 Ship Types (1, 2, and 3).
• Which organization administers MARPOL 73/78?
• One action done before entering a cargo pump room is to start the force draft fans for ventilation.
• Opening the valve(s) to the next tank being loaded before closing the valve(s) to the tank presently being tested is a 'best practice.' True or False
• "Plan B" in a cargo transfer plan is,
• True or False: Odor threshold is touted as an invaluable first-line detector for toxic vapors because all vapors have pleasant odors.
• Fire Point is defined as which of the following?
• Which valve type is described as Quick Acting?
• Which valve type is primarily used to protect equipment from backflow by allowing flow in only one direction?
• During tank cleaning, there is no need to monitor the tank's atmosphere.
• Benzene's Immediately Dangerous to Health or Life is 500PPM, but its TLV-TWA is only 1 PPM because it is known as a carcinogen.
• Which statement about the Freshwater Allowance (FWA) is true?
• Which statement best defines flashpoint?
• Static accumulating liquids can accumulate a static electric charge.
• Who must attend the pre-transfer conference?
• A fuel/air mixture below the lower explosive limit is too lean to burn.
• To perform hot work in a port, which sign-off is required?
• Inert gas (other than nitrogen) usually contains only 2-5% oxygen. Besides being oxygen deficient for humans, which component makes it extremely toxic?
• During tank cleaning, there is a need to monitor the tank atmosphere.
• Inert gas (besides nitrogen) usually contains only 2-5% oxygen. Besides being oxygen deficient for humans, what other component makes it extremely toxic?
• Which statement best describes the value of SDSs for cargo liquids?
• Under U.S. Coast Guard regulations, what must be lined up correctly before transferring cargo?
• Which phrase would you expect on a tanker warning sign?
• Volatility is a liquids ability to produce a flammable vapor and is expressed as a specific number on a scale from 0-10.
• A longitudinal framing system contains numerous, closely spaced transverse frames and few widely spaced longitudinal structural stiffeners.
• How many MARPOL Annex II pollution categories exist and how many ship types are defined?
• When getting ready to top off a tank, which statement best describes the required initial communication with the terminal?
• The ISGOTT guidance on static accumulators states the initial flow rate should be restricted to about 1 meter per second.
• The double hull section of a tanker is capable of carrying which of the following liquids?
• ISGOTT is a guide for oil tankers and terminals.
• OPA 90 only covers tank ships and barges
• Runarounds and jumpers both interconnect cargo systems on a tank ship or tank barge. Which statement best describes their difference?
• Which alarm is NOT found on an inert gas system?
• After loading a static accumulating cargo, no metallic equipment is put into the tank for how many minutes after the liquid flow ends?
• Which gas is commonly used to inert cargo tanks?
• A vapor with density greater than air tends to collect in pockets on deck.
• Vapor Pressure is more useful to PICs because it more closely measures a cargo tank's actual vapor space condition.
• Tracing the actual system piping during cargo operations is a valuable activity.
• Static accumulating liquids are good electrical conductors.
• Which statement about MARPOL Annex II pollution category in SDSs is true?
• Due to their high strength, loading arms can be moved without being drained.
• What operation is purging (blowing air into the tank) on the dilution graph?
• In Crude Oil Washed tanks, stripping capacity is 125% of the tank cleaning machines.
• What duration is the relaxation period after loading a static accumulating liquid?
• Which are the three types of bottom piping found on tank ships and tank barges?
• All overboard oily discharges are monitored for oil content and entered in the Oil Record Book. True or False?
• What is the purpose of the 60-second relaxation period after loading a static accumulating liquid?
• The Gate Valve is described as which characteristic?
• What does the Freshwater Allowance (FWA) account for?
• Fixed cleaning machines are falling into disfavor and less commonly found aboard tankers.
• Flash point is the lowest temperature at which emitted vapor burns without an external ignition source
• Cavitation bubbles form when the local pressure in a fluid falls below the liquid's saturation pressure for that temperature. Provided there is no air leakage, these bubbles are saturated vapor of the liquid.
• NLS tankers tank size limits are based on ship type, not vessel size.
• A cross-connected cargo pump suction and discharge system can lead to overheating of the pump with lower discharge flow.
• When securing a tug and barge connection, which method besides hydraulically operated rams or pins can be used to augment the connection?
• The best time to review SDSs for the next voyage is:
• The required gas supply capacity of an inert gas system is 125% of the capacity of which component?
• Benzene's Immediately Dangerous to Health or Life is 500PPM, but its TLV-TWA is only 1PPM because it is known as a carcinogen.
• In tanker operations, what does bunkering refer to?
• Which liquid is permissible to load into the double hull section of a tanker?
• The required gas supply capacity of an inert gas system is 125% of which capacity?
• To prevent the pinching of cargo hoses, which action should be taken?
• Vapor Density is the ratio of the vapor's density to the density of air.
• A cargo tank is gas freed when it
• A fully operated Inert Gas System is required to perform COW. At the two levels, one meter below the top of the tank and its mid-height, the maximum O2 by volume is?
• Which axis is labeled Hydrocarbon % Volume on the graph?
• Double hull ships may only have ballast in which tanks?
• What is the lowest temperature at which sufficient vapors form a flammable mixture?
• Why is benzene's TLV-TWA value set at 1 PPM, according to the material?
• Inert gas (other than nitrogen) usually contains only 2-5% oxygen. Besides being oxygen deficient for humans, what other component makes it extremely toxic?
• Line displacement should be included in the original loading or discharge plan.
• Vapor Density is the ratio of an emitted vapor's density to the density of air.
• Which of the following is not a precaution to be taken while topping off?
• To avoid the danger zone, which line would be considered safe for switching from purging to gas freeing?
• What is the lowest temperature at which a liquid can emit enough vapor to form an ignitable mixture in the presence of an external ignition source?
• OPA 90 only covers tank ships and barges.
• High velocity venting devices are designed to achieve a minimum exit velocity of
• Fixed cleaning machines incorporate automation controls, so there is no need to monitor machine setting, cycle times, or proper motion (especially rotation).
• Inert gas excluding nitrogen usually contains what percent oxygen?
• Which statement about odor threshold is true?
• In a liquid fire, it is the emitted vapor from the liquid which is burning
• The flammable or explosive range is all combinations of vapor and O2 that are ignitable mixtures.
• Who is responsible for providing the appropriate SDS for each cargo liquid?
• After washing a tank three times in preparation for hot work, the hydrocarbon concentration remains at 1%. The orders are to gas-free the tank. The next step is to
• MARPOL 73/78 Annex II addresses tankers carrying Noxious Liquid Substances.
• High velocity venting devices usually have
• When bunkering in port with other vessels nearby, what signal should be displayed for daytime and nighttime signaling?
• Reid Vapor Pressure is used by the USCG in the classification of what products?
• TLV-TEL is a short-term exposure limit for a 15-minute window that must not be exceeded while the daily TLV is not exceeded.
• Relief valves relieve to
• What does ullage measure in tanker operations?
• Which condition indicates gas freed?
• Plan B in a cargo transfer plan is:
• Which of the following indicates a properly inerted space?
• What is the correct TLV-TWA value for benzene?
• What is the minimum oxygen concentration necessary to enter a space?
• ROB stands for Remaining on Board.
• As the first tanker to use its hull as part of the cargo boundary, GLUCKAUF is said to be the first tanker.
• Crude Oil Washing is an effective way to remove oil and sediment from crude oil tanker cargo tanks and lessen the ROB (Remaining on Board).
• Which term describes the international agreement aimed at preventing pollution from ships?
• What is the minimum level of oxygen that must be present in an atmosphere to make a safe entry without breathing apparatus?
• The Freshwater Allowance (FWA) accounts for the density difference between fresh water and salt water. Applying it allows vessels to load for the water type(s) encountered in its voyage, and the vessel must remain afloat. True or False
• Which statement describes the fire point?
• Which statement about odor threshold is true?
• IDLH stands for which of the following?
• Which valve is most commonly used for throttling and precise flow control?
• International Safety Guide for Oil Tankers and Terminals recommends initial flow rate of static accumulators be restricted to (meters per second)
• A line displacement is a simple, routine procedure and does not need to be included in the original loading or discharge plan. True or False?
• Which statement accurately describes flashpoint classification with respect to temperature?
• Which pair of tanker designs are described as relying on the sea's hydrostatic force to prevent cargo outflow?
• Vapor density greater than 1 hazard: which outcome is correct?
• Which statement best defines odor threshold?
• After loading a static accumulating liquid, a 30 minute relaxation period is observed. What is the purpose of this relaxation period?
• Fully inerted means the cargo tank contains only inert gas.
• Positive displacement pumps cannot be damaged by solids intrained in the liquid being pumped.
• In hot climates, keeping all doors to the accommodation block open to take advantage of the prevailing breeze and lessen the air conditioning load is recommended.
• Before using an eductor, the discharge stream quantity must be considered because the discharge stream quantity needs to be accounted for.
• Where are the two measurement points for oxygen by volume in the tank during COW?
• Mid-deck and Coulumbi designs rely on which force to prevent cargo outflow?
• Which axis is labeled Hydrocarbon % Volume on the graph?
• IG in a tank is maintained at pressure so any leakage is IG out of the tank, and not air into the tank.
• USCG classifies cargoes as either flammable or combustible based on flashpoint, and then divides flammable liquids by Reid Vapor Pressure.
• A void or empty space between two bulkheads is called which term?
• Ceiling (TLV-C) is defined as the maximum concentration of vapor in air (can also be expressed as a permissible exposure limit) that is NEVER allowed.
• Which description correctly defines a cofferdam?
• Autoignition Temperature is the temperature at which
• The static suction lift of a pump is the difference in elevation between the pump impeller centerline and
• On a double hull tanker, to increase voyage revenue, cargo liquid is allowed to be loaded in the space between the vessel's hull and cargo tanks.
• What is the term for the space between tanks that acts as a barrier?
• MARPOL 73/78 and US CFR stipulate hull to tank spacing for double hulls based on vessel size.
• The statement 'A longitudinal framing system contains numerous, closely spaced transverse frames and few widely spaced longitudinal structural stiffeners' is:
• Inert gas used to fill cargo tanks typically contains what range of oxygen by volume?
• In a special liquid fire, the vapors emitted come from which source?
• Portable electric lights used in a petroleum tank must be
• The difference between a tank ship and a tank barge is that the tank barge is not self-propelled.
• A tank containing 50% of its capacity is Slack.
• Which group must attend the pre-transfer conference?
• Static accumulating liquids are good electrical conductors.
• For USCG both tank ships and tank barges are self propelled.
• Above the Upper Explosive Limit, the mixture is too rich to ignite.
• What is the PEL-TWA concentration for a benzene regulated cargo?
• Inerting oxygen content at or below what percent by volume?
• In US regulations, which term is not considered a discharge?
• After World War II, tanker size grew exponentially, and there were plans for an unbuilt 1,000,000 DWT vessel.
• Which protection level provides the maximum protection when transporting substances that pose the greatest environmental risk if an uncontrolled release from the vessel occurs?
• Which statement correctly describes safety data sheets?
• After washing a tank three times, hydrocarbon concentration drops to 1%. The orders are to gas-free the tank. The next step is to
• During COW, tankers must have operational ______ and use it.
• The design that minimizes cargo outflow during grounding and collision is the Double Hull.
• A void (or empty space) between two bulkheads is called a
• Hydrocarbon liquids contain only hydrocarbon and carbon atoms.
• Under TLV guidelines, which term represents the 15-minute, weighted-average exposure limit?
• When getting ready to top off a tank, which statement should you start the radio communication with the terminal?
• The International Safety Guide for Oil Tankers and Terminals (ISGOTT) recommends that the initial flow rate for static accumulators be
• Which statement best describes the purpose of a Safety Data Sheet?
• What is the maximum oxygen content by volume allowed in the tank's vapor space before loading when inerting?
• What does TLV-TEL represent?
• Which of the following best describes the information typically contained in a Safety Data Sheet?
• Which action can generate a static charge?
• The PEL-TWA concentration for a benzene regulated cargo is?
• USCG classifies cargoes as either flammable or combustible based on flashpoint, and then divides flammable liquids by Reid Vapor Pressure.
• The only ignition sources on tank ships and barges for starting fires are open flames and sparks.
• What does MARPOL 73/78 address?
• What is the cargo left behind that cannot be removed?
• The International Safety Guide for Oil Tankers and Terminals recommends the initial flow rate of static accumulators be restricted to how many meters per second?
• On the dilution graph used in tank operations, purging (blowing air into the tank) corresponds to which line?
• During Crude Oil Washing, the maximum oxygen by volume at the two measurement levels is what value?
• At what oxygen concentration by volume will all people experience some symptoms of oxygen deficiency?
• Which alarm is NOT found on an inert gas system?
• Heating coils can be operated regardless of the amount, i.e., the level of cargo in the tank. True or False?
• Which line would be considered safe to switch from purging to gas freeing?
• Ability to clean tanks is not an important consideration when designing a tanker.
• TLV-TWA stands for time-weighted average exposure over which period?
• TLV-TEL is a concentration to which workers can be exposed continuously for a short period of time (15 minute, weighted average), provided the daily TLV is also not exceeded.
• The IMO MARPOL 73/78 International convention addresses
• Benzene's immediately dangerous to health or life is 500 ppm but its threshold limit value time weighted average is only 1 ppm because it is a known carcinogen
• Which condition indicates a cargo tank has gas freed?
• We are transferring cargo liquid at a certain rate, the IG system must
• USCG allows only one hull design within US waters.
• The capacity of the stripping system in tanks that are COWed (Crude Oil Washed) is ____% of the tank cleaning machines, so the tank bottom is “dry” ie, not under a layer of crude oil being washed.
• Before entering a cargo space, ventilation with force draft fans should be established.
• What is the primary danger associated with free surface effects?
• Mixmasters never lead to contamination because of their valves seldom pass (leak) and they are always properly aligned for the intended cargo transfer.
• A fuel/air mixture below the lower explosive limit is too
• Which action is not a precaution to be taken while topping off?
• If a vapor's density is greater than 1, it tends to settle and pose a hazard.
• Fire Point is defined as?
• The threshold value limit ceiling can be exceeded for up to 15 minutes with no health consequences.
• What is benzene's Immediately Dangerous to Life or Health (IDLH) value?
• Why are strainers installed before pumps?
• Which of the following lists the benzene PEL-TWA correctly?
• Who is responsible for preparing the Safety Data Sheet for a specific liquid?
• What does the acronym COW stand for in crude oil tanker operations?
• Which statement about oxygen deficiency hazards in closed tanks is true?
• In tanker cargo tank statuses, which condition describes 'Empty'?
• What is not considered discharge?
• IMO's MARPOL cleaning criteria require that all horizontal and vertical tank surfaces are washed by direct impingement or by deflection or splashing of the impinging jet.
• Pumps are classified by the method by which they move and increase pressure of the liquid. Which classifications are most commonly listed?
• Successful cargo operations begin with crew familiarity with equipment and piping; tracing piping is valuable.
• Which valve is typically used for throttling the flow to achieve fine control?
• Crude Oil Washing is an effective method to remove sediment from crude oil tanker cargo tanks and lessen the Remaining on Board (ROB).
• Longitudinal bulkheads restrict the amount of cargo liquid moving to the low side of a roll, thereby improving transverse stability.
• A key element of developing the modern tanker was moving from carrying cargo in large casks to tanks fitted in the ship and discharged using pumps on the ships.
• Longitudinal bulkheads function.
• What is the primary safety objective of introducing inert gas into a cargo tank?
• Which of the following are signs that a pump is cavitating?
• According to MARPOL cleaning criteria, which methods are acceptable for washing?
• If a flange gasket leak is detected during testing, what action should be taken?
• A line displacement is a simple, routine procedure and does not need to be in the original loading or discharge plan. Adding it at the last minute is not an issue. True or False
• Which valve is designed to prevent backflow in the discharge line of a cargo pump?
• What does ROB stand for in crude oil tanker operations?
• IDLH is defined as a condition that poses a threat of exposure to airborne contaminants when the exposure is likely to cause death or immediate or delayed permanent adverse health effects or prevent escape from such environment.
• The Globe Valve is described as which characteristic?
• During sampling, which device is lowered into the tank to obtain a cargo sample?
• MARPOL Annex II uses four pollution categories and three ship types.
• Which gas is tested for first when assessing the atmosphere of a space?
• An emitted vapor has a vapor density greater than 1; its hazard is that it 'falls' and settles in pockets on deck.
• Which of the following is true regarding benzene PEL-TWA values?
• Which statement is true regarding eductors?
• Benzene's IDHL is 500 ppm.
• At a minimum, a cargo hose is tested __ to __ % of its MAWP.
• Which of the following is not listed as a pump classification?
• Static suction lift means the surface of the liquid is located relative to the pump suction?
• NLS tank size limits are based on which factor?
• What does the acronym COW stand for?
• What does PEL-TWA stand for?
• At the autoignition temperature, the external ignition source is so small as to be undetectable.
• Slack is defined as liquid content of what range?
• MARPOL Annex II addresses tankers carrying Noxious Liquid Substances.
• Inerting cargo tanks with nitrogen is used to prevent cargo liquid exposure to oxygen during the voyage.
• Pumps are classified by the method by which they move and increase pressure of the liquid. Which of the following is a pump classification?
• Which line would you select for Critical Dilution with Air operation?
• Which statement best describes gas freed state in a cargo tank?
• Fire Point is the lowest temp that emitted vapor can burn for 6 seconds after initial fire
• Though three hull designs exist which minimize cargo outflow in a grounding and/or collision, the USCG allows only one within US waters. Which design is it?
• What does TLV-TWA represent?
• An oxygen-deficient atmosphere can exist in a freshwater tank due to rusting of the steel within it.
• A fuel/air mixture below the lower explosive limit is too
• Hydrocarbon liquids contain only hydrogen and carbon atoms.
• Double hull design primarily reduces the risk of cargo leakage due to hull breach.
• CHEMTREC should be contacted because they have all the answers.
• Longitudinal bulkheads are used to restrict shifts in the cargo's center of gravity and improve stability.
• To reduce the risk from static electricity during loading, which practice is recommended?
• MARPOL 73 addressed growing consequences of pollution caused by larger tankers and the realization that Earth's marine environment is fragile.
• Immediately dangerous to life or health (IDLH) is best described as which of the following?
• Threshold Limit Value - Time Weighted Average (TLV-TWA) describes which of the following?
• In inert gas (excluding nitrogen) which contains 2-5% oxygen, which component contributes to its toxicity?
• The three types of bottom piping found on tank ships and tank barges are direct loop, ring main, and free flow
• Odor Threshold is defined as which of the following?
• When a cargo tank is properly inerted, the precautions for handling static accumulating liquids need not be followed.
• Which valve type is designed to prevent backflow and maintain one-way flow?
• IG in a tank is maintained at pressure so any leakage is IG out of the tank, and not air into the tank.
• The abbreviated name for a tug and barge combination in which the tug fits into a notch at the barge's stern, propels the barge by pushing it, and is not permanently connected to the barge is an
• Which valve type is best suited for on/off control due to its quick action?
• At what oxygen concentration by volume do all people experience some or all the symptoms of oxygen deficiency?
• Autoignition temperature is defined as which of the following?
• What term describes the distance from the top of a tank to the surface of the liquid?
• Loading cargo liquid into the space between the hull and cargo tanks on a double hull tanker to increase voyage revenue is allowed.
• A Very Large Crude Carrier is capable of carrying crude oil.
• At the autoignition temperature, the external ignition source is so small as to be undetectable.
• Noxious Liquid Substances are regulated under MARPOL Annex II.
• Non-flanged cargo piping is connected by which device?
• Positive displacement pumps cannot be damaged by solids entrained in the liquid being pumped.
• Which statement best describes what a safety data sheet contains?
• Which term describes the concentration that must not be exceeded in the workplace for an 8-hour period?
• Which of the following would NOT be considered a bottom piping arrangement on a tank ship?
• SDSs for cargo liquids with identical product trade names from different sources are:
• What is the standard wording of a tanker warning sign?
• Vapor Pressure is more useful to PICs because it more closely measures a cargo tank's actual vapor space condition.
• Which of the following are signs that a pump is cavitating?
• According to ISGOTT, the relaxation period after loading static accumulating liquids need not be followed.
• Which statement best describes Plan B in cargo transfer planning?
• Cavitation bubbles form when the local pressure in a liquid falls below the liquid’s saturation pressure for that temperature.
• MARPOL cleaning criteria allows washing by deflection or splashing of the impinging jet.
• Benzene's Immediately Dangerous to Health or Life is 500 PPM, but its TLV-TWA is only 1 PPM because it is known as a carcinogen.
• Nitrogen gas can be used to inert cargo tanks. In which situation is it used?
• What is the purpose of bulkhead subdivision?
• What is the PEL-TWA for benzene regulated cargo?
• Purging (blowing air into the tank) is used to achieve what?
• ATB stands for
• On the graph, the operation named Critical Dilution with Air is represented by which line?
• Cargo tanks are inerted with nitrogen in which situations?
• Hull-to-tank spacing for double hull tankers is specified by which regulation?
• Which statement is true about lines relative to the danger zone on the graph?
• Which cargo property is used to assess the vapor space condition of a cargo tank?
• Plan B is best described as:
• A tank that has been closed for a long time may experience which condition?
• Which gas is commonly used to inert cargo tanks to reduce flammability risk?
• The Threshold Limit Value-Ceiling duration can be exceeded for up to 15 minutes with no consequences to the exposed person's health or life.
• Liquid petroleum products can accumulate a static electric charge by
• The Threshold Limit Value-Ceiling duration can be exceeded for up to 15 minutes with no consequences to the exposed person's health or life.
• MARPOL 73/78 addresses pollution of the marine environment.
• Ceiling (TLV-C) refers to the maximum concentration of vapor in air that is:
• Fixed cleaning machines are falling into disfavor and less commonly found aboard tankers and tank barges.
• In the USCG classification of petroleum liquids, grade E is a
• If a tank is described as Empty, which statement is true?
• Cavitation in a pump typically causes which combination of effects?
• In USCG grade E classification, grade E represents which category of petroleum liquids?
• Which statement about static accumulating liquids in properly inerted cargo tanks is true?
• Which statement best defines Immediately Dangerous to Life and Health (IDLH)?
• Cavitation is described as the formation of bubbles when the local pressure falls below the liquid’s saturation pressure for that temperature.
• What does ATB stand for in maritime towing?
• Non ranged cargo piping is connected by which device?
• OPA 90 is a regulation related to oil pollution that applies to vessels and facilities, not only ships.
• A longitudinal framing system is characterized by numerous longitudinal members and widely spaced, large transverse frames. This statement is:
• The number of hull designs that minimize cargo outflow in grounding or collision is three.
• Which term refers to the vapor concentration in air that can be detected by most individuals through sense of smell and is not an absolute value?
• Volatility is a liquids ability to produce a flammable vapor and is expressed as a specific number.
• What does the y-axis measure on this graph?
• MARPOL 73/78 divides cargo into two types, Oils and Noxious Liquid Substances
• What are the X and Y axes on the graph?
• Device for connecting non flanged pipes
• A free-flow bottom cargo piping system is typical on which vessel type?
• Which vessel type is self-propelled under USCG terms?
• Odor threshold is an unreliable detection method for toxic vapors because noses quickly notice the sweet odors.
• Which of the following statements correctly identifies the x-axis on the graph?
• During COW, tankers must have operational _________ and use it.
• The 60-second relaxation period after loading a static accumulating liquid is intended to allow the liquid's accumulated static charge to dissipate.
• The IBC and CH specify three levels of protection against uncontrolled release of cargo, type 1, type 2, type 3. Which provides the maximum level of protection possible when transporting substances that pose the greatest environmental risk if an uncontrolled release from the vessel should occur?
• Which term is defined as a void space between two bulkheads?
• OPA90 was enacted before EXXON VALDEZ grounded in Prince William Sound.
• A US barrel contains ______ gallons
• Inerted cargo tanks with nitrogen are used in which situations?
• Which of the following is the international code that defines Type 1, Type 2, and Type 3 protection levels for ships carrying dangerous chemicals?
• After World War II, tanker size exponentially grew, with plans for an unbuilt 1 million DWT vessel.
• IMO's MARPOL cleaning criteria states that all horizontal and vertical areas are washed by direct impingement or effectively by deflection or splashing of the impinging jet.
• Tank cleaning machines can generate static electricity due to high velocity cleaning medium.
• The static suction lift of a pump is the difference in elevation between the pump impeller centerline and
• The USCG tank ship is self propelled and the tank barge is not self propelled.
• MARPOL Annex II identifies four pollution categories: X, Y, Z, and Other.
• Which description matches the 'Full' status of a cargo tank?
• Transverse framing is characterized by numerous athwartships frames attached to the keel and was developed during the transition from wooden to iron/steel ships.
• MARPOL 73/78 divides cargo into two types, Oils and Noxious Liquid Substances.
• All overboard oily discharges are monitored for oil content and recorded in which logbook?
• After providing appropriate first aid for ingestion, there is no need for follow-up with medical authorities.
• When is the best time to review the next voyage cargo liquid SDSs?
• Odor Threshold is an invaluable first line detection tool for toxic vapors because human noses quickly notice the sweet odors they emit.
• Which document sets the overall construction and equipment requirements for ships carrying dangerous chemicals?
• Which hull design is allowed within US waters by USCG to minimize cargo outflow?
• What is the maximum oxygen concentration allowed for an inert tank?
• After loading a static- accumulating cargo, no metallic equipment is put into the tank for __ minutes after the liquid flow ends.
• At the auto ignition temperature, the external ignition source is so small as to be undetectable.
• Free surface effect is caused by the shift of the onboard liquids' center of gravity to the low side when a vessel heels.
• The TVL-TWA for a cargo liquid's emitted vapor are different on deck and inside a cargo tank.
• Issues which can arise when cargo pump suction and/or discharge sides are cross connected are
• A US barrel contains how many gallons?
• What does PEL-TWA stand for?
• The preferred operating mode for the pump suction is?
• In the context of flammable liquids, Reid vapor pressure is used by the USCG to categorize them.
• What is the primary purpose of inerting cargo tanks?
• The purpose of the 30-minute relaxation period after loading static accumulating liquids is to dissipate static charge.
• Inert gas mixtures may contain a toxic component. Which statement is true?
• Which statement about maintaining oxygen content in inerted cargo tanks is correct?
• After loading a static accumulating liquid, a 30 minute 'relaxation period' is observed. Its purpose is for the
• A vapor with a density greater than 1 is heavier than air and tends to settle in low areas. Which of the following best describes this statement?
• Non-metallic hose for oil transfer can be used if
• Portable tank cleaning machines are easy to rig up and operate. Consequently, fixed cleaning machines are falling into disfavor and less commonly found aboard tankers and tank barges.
• Vapors that are denser than air collect in low areas. True or False?
• A void or empty space separating two spaces is a
• If the Safety Data Sheet is missing during an incident, who can you call 24/7 for first aid guidance on ingestion of cargo liquid?
• Which of the below listed liquids may be loaded into the double hull section of a tanker?
• A static accumulating cargo must be initially loaded at a reduced rate until the bottom framing of the tank is immersed in the cargo. This process is called
• Which document records the oil content of oily discharges?
• An oxygen-deficient atmosphere can exist in a freshwater tank due to oxidation of steel within it.
• A characteristic of eductors is that the liquid quantity leaving the eductor is greater than the quantity pumped.
• A 'free-flow bottom cargo piping system is most likely to be found on a Very Large Crude Carrier (VLCC).
• Which condition describes cavitation when it occurs in a pump?
• At the auto ignition temperature the external ignition source is so small as to be undetectable.
• For flammable liquids, the USCG uses their Reid vapor pressure to categorize them as Class A, Class B, and Class C.
• Which statement about PEL-TWA is true?
• What is the primary purpose of bottom piping on tank ships?
• Fixed cleaning machines incorporate automation controls, so there is no need to monitor machine setting, cycle times, or proper motion (especially rotation).
• Which pairing of terms to definitions correctly matches the definitions?
• The initial flow rate for static accumulators recommended by ISGOTT be restricted to
• Reid Vapor Pressure is used by the USCG in the classification of what products?
• Which organization is associated with the rule that tank ships are self-propelled and tank barges are not self-propelled?
• Which statement about MARPOL 73/78 is correct?
• Which statement about bottom piping arrangements on tank ships and barges is correct?
• An emitted vapor has a vapor density greater than 1; its hazard is that it 'falls' and settles in pockets on deck.
• Reid Vapor Pressure is used by the USCG in the classification of what products?
• MARPOL 73 addressed growing consequences of pollution caused by larger tankers and the realization that Earth's marine environment is fragile.
• In the graph, which line represents the operation of Critical Dilution with Air?
• A void or empty space separating two spaces is called a
• The capacity of the stripping system in tanks that are COWed (Crude Oil Washed) is ____% of the tank cleaning machines, so the tank bottom is dry.
• Which of the following is NOT a listed common pump classification?
• The explosive range (LEL to UEL) can change when the surrounding oxygen concentration changes.
• Inert gas (other than nitrogen) usually contains only 2-5% oxygen. Besides being oxygen deficient for humans, which component makes it extremely toxic?
• A cargo tank is considered Slack when it contains liquid in what range of capacity?
• Which vessel type is most likely to use a free-flow bottom cargo piping system?
• Free surface's negative effect on stability is reduced by
• Permissible Exposure Limit - Time Weighted Average (PEL-TWA) describes which of the following?
• Which condition defines an empty cargo tank?
• Does the SDS include MARPOL 73/78 Annex II pollution category?
• The Oil Record Book is used to record information about oil content and discharges.
• If a chemical liquid loading incident occurs and the Safety Data Sheet (SDS) is missing, which two resources should you contact for appropriate first aid guidance?
• Common pump problems encountered are caused by which of the following?
• To the USCG, tank ships are self-propelled and tank barges are not self-propelled.
• The Ball or Plug Valve is categorized as which characteristic?
• What type of valve is used on the discharge side of a cargo pump?
• Which statement best describes the IDLH level's meaning?
• A US barrel contains 42 gallons.
• A cargo tank is gas freed when it has an oxygen content 21% by volume and no hydrocarbon vapor present.
• Which statement best defines flash point, according to the material?
• Which statement correctly describes the axes of the graph?
• TLV-TWA is defined as airborne concentrations of substances which represent conditions under which it is believed that nearly all workers may be repeatedly exposed day after day without adverse health effects.
• Regarding tank cleaning in tanker design, which statement is accurate?
• Issues which can arise when cargo pump suction and/or discharge sides are cross connected are
• What certifies what a ship can carry?
• Which term describes the maximum vapor concentration in air that is NEVER allowed?
• What is the PEL-TWA for benzene regulated cargo?
• Crude oil's rotten egg smell is hydrogen sulfide. Personnel exposed to H2S can experience
• What does the x-axis measure on this graph?
• OPA90 was enacted before the Exxon Valdez grounding.
• Which statement about ignition ranges is NOT true?
• Which hull design is allowed by the USCG within US waters to minimize cargo outflow in grounding and/or collision?
• A characteristic of eductors is that the liquid quantity leaving the eductor is greater than the quantity of the fluid being pumped. True or False?
• During tank cleaning, there is no need to monitor the tank's atmosphere.
• A static accumulating cargo initially loads at a reduced rate until the tank bottom structure is immersed and the liquids surface is smooth. This process is called
• Which line is safe to switch from purging to gas freeing on the graph?
• Under MARPOL 73/78 and US CFR, hull-to-tank spacing for double hulls is based on what factor?
• What is the typical oxygen content in inert gas (excluding nitrogen)?
• According to USCG, are tank ships and tank barges both self-propelled?
• What should be done in case of a problem with cargo transfer?
• Though three hull designs exist which minimize cargo outflow in a grounding and/or collision, the USCG allows only one within US waters. Which design is it?
• Which condition describes a lean fuel/air mixture?
• Which statement best describes a key development in the modern tanker?
• If you are stripping a tank, you must
• Handling precautions for static accumulating liquids need not be followed for properly inerted cargo tanks.
• A tank containing 99% of its capacity is considered Full.
• Which vessel type is not self-propelled according to USCG definitions?
• MARPOL Annex II defines pollution categories and ship types. How many categories and ship types are specified?
• Volatility is a liquid's ability to produce a flammable vapor and is expressed as a specific number.
• NLS tankers tank size limits are based on vessel size, not ship type.
• Which statement correctly describes a fuel/air mixture that is below the lower explosive limit?
• What is the abbreviated name for a tug and barge combination in which the tug fits into a notch at the barge's stern and pushes the barge, without permanent connection?
• IDLH implies exposure is likely to cause:
• Tank cleaning machines can generate static electricity due to high velocity cleaning medium.
• Which parameter is used to classify flammable liquids?
• Which line is safe to switch from purging to gas freeing on the graph?
• The Freshwater Allowance accounts for the density difference between fresh water and salt water and allows vessels to load for encountered water types; the vessel must remain afloat. True or False?
• What does PEL-TWA represent?
• What is thieving in tanker operations?
• Which description correctly defines flashpoint?
• The objective of crude oil washing is to
• Benzene's IDLH is 500 PPM and its TLV-TWA is 1 PPM because it is a carcinogen.
• Common pump problems encountered are caused by:
• Is opening the valve(s) to the next tank being loaded before closing the valve(s) to the tank presently being tested considered a best practice?
• To reduce static electricity during loading, which practice is recommended?
• Which valve type is described as providing one-way flow?
• Free surface effect is most significant when tanks are partially filled.
• A cargo tank is considered Full when its contents fill at least 98% of its volumetric capacity.
• Reid Vapor Pressure measures what?
• Which device connects non ranged cargo piping?
• After loading a static accumulating liquid, a 30-minute relaxation period is observed. The purpose of the relaxation period is to
• To declare a space gas-free, hydrocarbon concentration must be reduced to what level?
• Which gas is tested for first when assessing the atmosphere of a space?
• What is one method to generate static electricity in a tank?
• Nitrogen gas can be used to inert cargo tanks. In which situation(s) is it used?
• The 'Threshold Limit Value - Ceiling' can be exceeded for up to 15 minutes with no consequences to health or life of the exposed person.
• What unit is used to measure oil capacity?
• Heating coils can be operated in all cargo levels.
• Which condition of a vessel's tanks produces the greatest destabilizing free surface effect?
• Ceiling limit refers to which of the following?
• It is fortunate that people experiencing oxygen deficiency recognize both what is happening to them and have their full strength to exit the space or area?
• In USCG classification, Grade E corresponds to which type of liquid?
• Which statement is true regarding benzene exposure limits as described?
• Static accumulating liquids are good electrical conductors.
• If spilled, HFO is easier to clean up than a refined product.
• Reducing shifts of the cargo's center of gravity has what effect on stability?
• Gas freed in a cargo tank occurs when the oxygen content is 21% by volume and no hydrocarbon vapor remains.
• Which statement correctly describes the relative protection levels Type 1, Type 2, and Type 3?
• The fitting at the bitter end of the bottom of the piping to each cargo tank is called what?
• Volatility is a liquid's ability to produce a flammable vapor and is expressed as a specific number on a scale of 1-10. This statement is:
• After loading a static accumulating liquid, the 60-second relaxation period is to what?
• Which system is required to perform Crude Oil Washing?
• A Safety Data Sheet (SDS) contains information about a cargo's hazards, properties, and safe handling. This statement is best described as:
• Crude oil's rotten egg smell is hydrogen sulfide. Personnel exposed to increasing H2S concentrations can expect to experience
• Which condition is described as a pump shaking and sounding like a gremlin?
• What is the preferred operating mode for the pump suction?
• MARPOL 73/78 is primarily concerned with what topic?
• The TVL-TWA for a cargo liquid's emitted vapor is different on deck and inside a cargo tank.
• After loading a static accumulating liquid, a 60 second relaxation period is observed. What is its purpose?
• What are the X and Y axes on the graph?
• Crude Oil Washed (COW) systems require the stripping system capacity to achieve the tank bottom being dry. Which percentage is specified for this capacity relative to tank cleaning machines?
• Which statement best describes autoignition temperature?
• Which topic does MARPOL address?
• Odor Threshold is defined as...
• Which statement about ignitable vapor–air mixtures is true?
• In a tank that has been closed for a long period, what condition may occur?
• The preparation for cargo operations emphasizes familiarity with equipment and system piping.
• What key development in tanker design enabled cargo to be discharged using pumps on the ship?
• During tank cleaning, monitoring the tank atmosphere is necessary.
• Which professional must sign off before hot work in port?
• Flash Point is defined as which of the following?
• In the context of the graph, which line corresponds to Critical Dilution with Air?
• Which signal indicates bunkering operations are in progress during signaling in port?
• Which statement about cavitation is not true?
• Which of the following is a MARPOL Annex II pollution category?
• The statement that GLUCKAUF was the first tanker to use its hull as part of the cargo boundary is true.
• What is the objective of crude oil washing?
• LEL stands for
• Which statement about LEL and UEL is NOT true?
• Where do most cargo fires start on tankers?
• During loading a tanker, what should you do with the valves?
• Which axis is labeled Oxygen % Volume on the graph?
• Cargo liquids are categorized into two types: flammable (defined by flash point and Reid vapor pressure) and combustible (defined by flash point). Which criterion differentiates them?
• What is the usual working pressure for a hose?
• Reid Vapor Pressure is defined as what?
• Which statement best describes the 30-minute relaxation period after loading static accumulating liquid?
• In tanker transfer terminology, runaround refers to hard piping, and jumper refers to a hose.
• In the USCG's classification of petroleum liquids, Grade E is a
• A longitudinal framing system is characterized by which of the following?
• The fitting at the bitter end of the bottom piping to each cargo tank is called what?
• Benzene's threshold limit value time weighted average is 1 ppm.
• A 'free-flow' bottom cargo piping system is most likely to be found on which vessel type?
• Cofferdam
• Though three hull designs exist which minimize cargo outflow in a grounding and/or collision, the USCG allows only one within US waters. Which design is it?
• The flammable or explosive range is all combinations of vapor and O2 that are ignitable mixtures.
• The connection to make up a tug and tank barge ATB unit can be
• Handling precautions for static accumulating liquids need not be followed for properly inerted cargo tanks.
• The lowest temperature at which sufficient vapor is emitted by a liquid to form an ignitable mixture in the presence of an external ignition source is its
• Which alarm is not found on an inert gas system?
• To the USCG, tank ships are self-propelled and tank barges are not self-propelled.
• Mid-deck and Coulumbi designs rely on sea's hydrostatic force to prevent cargo outflow.
• A tank containing 0% of its capacity is Empty.
• What is the primary purpose of maintaining inert gas pressure in a tank?
• In inert gas systems used on tankers, the gas introduced to the cargo tank primarily functions by reducing which component of the atmosphere?
• Which statement defines the two cargo-liquid categories?
• Who completes the certificate of inspection for a tanker?
• A fuel/air mixture below LEL is
• You are the PIC for a chemical liquid loading. The SDS is missing. Which resource(s) can you call for appropriate first aid guidance if a crew member ingests cargo liquid?
• Static accumulating liquids are good electrical conductors.
• Which of the below liquids may be loaded into the double hull section of a tanker?
• Lower Explosive Limit is defined as which of the following?
• Liquid petroleum products can accumulate a static electric charge by
• What is the purpose of a 30-minute relaxation period after loading a static accumulating liquid?
• Heating coils can be operated regardless of the amount, i.e., the level of cargo in the tank. True or False
• The connection to make up a tug and tank barge unit can be which of the following?
• When providing first aid to a poisoned person, what should you check first (the ABC sequence)?
• Which hull design name is associated with minimizing cargo outflow in grounding or collision scenarios?
• Installing strainers before pumps is usual practice because:
• Portable tank cleaning machines are easy to rig up and operate.
• The emergency shutdown requirements apply to
• The abbreviated name for a tug and barge combination in which the tug fits into a notch at the barge's stern, propels the barge by pushing it, and is not permanently connected to the barge is
• Inert gas (excluding nitrogen) usually contains 2-5% oxygen. Besides oxygen deficiency, which component makes it highly toxic?
• Which condition corresponds to the 'Slack' status of a cargo tank?
• Who enforces shipping regulations?
• Free surface's negative effect on stability is reduced by
• Above the Upper Explosive Limit, the proportion of vapor in the mixture is too high to ignite and burn; the mixture is 'too rich'.