OCTCO/OCTF exit exam questions and answers — Set 9
Set 9 of the Oil and Chemical Tanker Cargo Operations (OCTCO/OCTF) exit exam bank — 12 of 252 questions, with the correct option marked and a one-line explanation for every one. Read it end to end, jump to a single set, or search it — then sit the same bank as a timed paper. The real DG Shipping exit exam is 30 marks with 15 to pass.
These are the bank's original groupings. Practising deals the whole bank out again every time you reshuffle, so a practice “Set 3” is a different 30 questions each time — the set numbers below are the source file's, and are only used here so the key stays navigable. Options are listed in their original order with fixed letters; when you practise, those move too.
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Set 9 — 12 OCTCO/OCTF exit exam questions with answers
1. In IG the mass of the water vapor contained in a given volume of saturated gas depends on the.........of the gas?
- A. temperature
- B. color
- C. volume
- D. velocity
2. Which of the following is a safety consideration when dealing with liquefied gas?
- A. its corrosive
- B. it's cold
- C. it's cacogenic
- D. its caustic
3. Before entry into a cargo tank which has contained a petroleum product.........
- A. adjacent tanks must be empty
- B. the tank must be filled with fresh water and emptied
- C. static electricity must be measured
- D. the tank must be tested for a sufficient amount of oxygen
4. The blower casing is of ...... material?
- A. highly water resistant
- B. corrosion resistant
- C. both a and b
- D. none of the above
5. This valve is used in conjunction with closed and restricted measurement equipment to allow measurement in ship tanks that are closed to the atmosphere. Once a portable measurement unit (PMU) is attached to the VCV, the valve is opened and the PMU probe is dropped into the tank to perform the required measurement.
- A. PMU point
- B. measurement valve
- C. Both (A) and (B)
- D. vapor control valve (VCV)
6. Which of the following describes a liquefied gas?
- A. a liquid that needs to be stored at absolute zero to prevent it from becoming gaseous.
- B. a gas that is mixed with another substance that causes it to liquefy
- C. a substance that at normal temperature and pressure would be a gas
- D. a liquid that is required to be heated above normal ambient temperature to make it from a gas
7. As well as chemical what may chemical tankers also be used to transport.......
- A. waste products
- B. other liquid products
- C. nuclear waste
- D. bulk acids
8. The IG blower ........introduced pressure fluctuations in inert gas demand.
- A. must not
- B. should
- C. may or may not
- D. none of the above
9. Are all pumps and blowers shut down during the emergency shut down procedure of a shipboard inert gas system?
- A. no, the sea water pumps and the blowers are still running
- B. no, the scrubber sea water pumps are still running
- C. no, sea water cooling of deck seal running
- D. yes, all is shut down
10. The draft reading at the middle of the ship markings, this draft can and often does, differ from the mean draft due to hogging or sagging?
- A. mean draft
- B. moulded draft
- C. midship draft
- D. none of the above
11. Mast riser fire doesn't normally occur during?
- A. purging
- B. discharging
- C. loading
- D. purging inert gas pressure during normal passage
12. What is the term for filling tanks with nitrogen, or similar liquid or gas to prevent cargo contact with the atmosphere?
- A. covering
- B. padding
- C. blanketing
- D. inerting
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