USCG Tankerman Assistant (Liquefied Gases) Practice Test

10 sample Tankerman Assistant (Liquefied Gases) questions with answers

The same 10 on every visit. A related section is the closest match RegKnot found in the regulations and references; it is not part of the NMC’s answer key.

1. Question 1 · Tank Vessel – Assistant

   On a barge carrying bulk liquid hazardous cargo, remote controls for quick-closing shut off valves are required in how many location(s)?

   • A.1
   • B.2 (correct answer)
   • C.3
   • D.4

   Answer: B. 2

   Related regulation: 46 CFR 151.20-5 ↗ — Cargo system valving requirements

2. Question 2 · Tank Vessel – Assistant

   Your tank vessel is loaded down to her marks, and you find that she has too much trim by the stern. What action should you take to obtain an even keel and still maintain profitability?

   • A.Discharge cargo amidships
   • B.Load more cargo forward
   • C.Add ballast forward
   • D.Shift bunkers forward (correct answer)

   Answer: D. Shift bunkers forward

   Related regulation: NVIC 05-86 Encl.1 — Voluntary Standards for U.S. Uninspected Commercial Fishing Vessels — Enclosure (1)

3. Question 3 · Tank Vessel – Assistant

   Which of the following defines flammable liquids for the purpose of U.S. regulations?

   • A.liquids that give off flammable vapors only above 80°F (27°C)
   • B.liquids that have a Reid vapor pressure of 18 pounds or more
   • C.liquids that give off flammable vapors at or below 80°F (27°C) (correct answer)
   • D.liquids that sustain combustion at a temperature at or below 100°F (38°C)

   Answer: C. liquids that give off flammable vapors at or below 80°F (27°C)

   Related regulation: 46 CFR 188.10-27 ↗ — Flammable liquid

4. Question 4 · Tank Vessel – Assistant

   What is the primary hazard of liquefied petroleum gas and liquefied natural gas?

   • A.Temperature
   • B.Flammability (correct answer)
   • C.Toxicity
   • D.Pressure

   Answer: B. Flammability

   Related regulation: ERG Guide 115 — Gases - Flammable (Including Refrigerated Liquids) (Cyclopropane, Refrigerant gas R-152a, Dimethyl ether, Ethane, Ethyl chloride)

5. Question 5 · Tank Vessel – Assistant

   Which topic is NOT required to be discussed at the pre-transfer conference?

   • A.Details of transferring and receiving systems
   • B.Estimated time of finishing cargo (correct answer)
   • C.Identity of the product to be transferred
   • D.Emergency shutdown procedures

   Answer: B. Estimated time of finishing cargo

   Related regulation: 46 CFR 153.968 ↗ — Cargo transfer conference

6. Question 6 · Tank Vessel – Assistant

   In reference to accidental oil pollution, the most critical time during bunkering is when __________.

   • A.Hoses are being disconnected
   • B.Final topping off is occurring (correct answer)
   • C.You first start to receive fuel
   • D.Hoses are being blown down

   Answer: B. Final topping off is occurring

   Related regulation: EPA 2013 VGP 5.4.1 — EPA 2013 VGP 5.4.1 Additional Effluent Limits — EPA Vessel General Permit (2013)

7. Question 7 · Tank Vessel – Assistant

   Span gas is used for what process?

   • A.To ensure an inert atmosphere during the span of time when a system is being brought to a dry air condition from a flammable atmosphere
   • B.To calibrate a gas analyzer to ensure it indicates correct gas concentrations (correct answer)
   • C.To find the zero point on a gas analyzer
   • D.To purge tanks in a gas-freeing process

   Answer: B. To calibrate a gas analyzer to ensure it indicates correct gas concentrations

   Related regulation: 46 CFR 148.420 ↗ — Flammable gas analyzers

8. Question 8 · Tank Vessel – Assistant

   According to U.S. regulations, tank vessels with greater than 250 barrels capacity are required to have a means of emergency shutdown. This device does which of the following?

   • A.shuts off the main propulsion plant
   • B.shuts off the firefighting foam systems
   • C.stops the flow of oil to shore facility or other vessel (correct answer)
   • D.secures electrical power to all motors

   Answer: C. stops the flow of oil to shore facility or other vessel

   Related regulation: 33 CFR 155.780 — Emergency shutdown

9. Question 9 · Tank Vessel – Assistant

   How can you determine which grades of cargo a tank vessel is permitted to carry?

   • A.refer to the vessel's Certificate of Inspection (correct answer)
   • B.check the loading order
   • C.examine the cargo tanks and fittings
   • D.ask the terminal supervisor or his representative

   Answer: A. refer to the vessel's Certificate of Inspection

   Related regulation: USCG MSM 16000.70 Ch.3 — Marine Safety — Marine Inspection Administration — Ch.3 DOCUMENTATION OF VESSEL INSPECTIONS

10. Question 10 · Tank Vessel – Assistant

    Who completes the Declaration of Inspection before loading a tank vessel?

    • A.The manager of the shore facility.
    • B.The designated person in charge. (correct answer)
    • C.The US Coast Guard.
    • D.The American Bureau of Shipping.

    Answer: B. The designated person in charge.

    Related regulation: 46 CFR 35.35-30 ↗ — “Declaration of Inspection” for tank vessels—TB/ALL

Exams these questions come from

• Tank Vessel – Assistant50 questions

Requirements for the endorsement

• 46 CFR 13.401: Requirements for Tank Vessel-Assistant endorsement applicants
• 46 CFR 13.403: Switching Tank Vessel-Assistant DL and LG endorsements

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