CHEMCO exit exam questions and answers — Set 8
Set 8 of the Advanced Training for Chemical Tanker Cargo Operations (CHEMCO) exit exam bank — 30 of 377 questions, with the correct option marked. This bank is answer-only: the source published no usable explanations for it, so there are none here either. 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 8 — 30 CHEMCO exit exam questions with answers
1. What is IOPC fund?
- A. International Oil Pollution Compensation Funds
- B. International Oil tanker Pollution Compensation Funds
- C. International Oil and hazardous chemical Compensation Funds
- D. International Oil Pollution Compensatory Funds
2. In March 1989, Exxon Valdez ran aground in Alaska (U.S.) spilling approximately 40,000 tons of crude oil into the sea, causing serious environmental damage. What was the outcome legislation that followed the disaster?
- A. CLC Convention and the Fund Convention
- B. Oil Pollution Act of 1990 (OPA 90)
- C. Bunker Convention
- D. LLMC Convention
3. What does LLMC Convention stand for?
- A. Convention on Limitations of Liabilities for Maritime Claims
- B. Conventionon Limited Liabilities for Marine Claims
- C. Convention on Liabilities limited for Marine Claims
- D. Convention on Liabilities with Limits for Maritime Claims
4. The meaning of the CLC Convention is,
- A. Civil Liability Convention for Oil Pollution Damage
- B. Civil Liability Convention for Damage from NLS
- C. Civil Liability Convention for Air Pollution
- D. Civil Liability Convention for pollution by Sewage
5. Under which operation the volumetric cargo losses are more?
- A. During Tank to tank transfer onboard
- B. During Ship to shore transfer
- C. During COW
- D. During circulation inside the same Tank onboard
6. In spite of using clean sample bottles to acquire individual samples from each level (ie top, middle and bottom of each of the ship’s tanks) and clearly labelled for density calculation, why the final result may not provide the correct density value?
- A. Due to temperature variations
- B. Due to Viscosity variations
- C. Due to the loss of volatile fractions to atmosphere
- D. Due to changes in Emulsion
7. What can be the probable causes for a gross mismatch between ship and shore oil figures?
- A. Ullages incorrectly measured, Tanks filled but not taken into account, The contents of pipelines not allowed for, Cargo mistakenly loaded on top of ballast and Cargo lost in the shore installation.
- B. Incorrectly measured Ullages/ Temperatures/ densities, Tanks filled but not taken into account, The contents of pipelines not allowed for, Incorrect temperatures or densities, Cargo mistakenly loaded on top of ballast and Cargo lost in the shore installation.
- C. Ullages incorrectly measured, Tanks filled but not taken into account, The contents of pipelines not allowed for, Incorrect temperatures or densities, and Cargo lost in the shore installation.
- D. Ullages incorrectly measured, The contents of pipelines not allowed for, Incorrect temperatures or densities, Cargo mistakenly loaded on top of ballast and Cargo lost in the shore installation.
8. Normally which one will affect the final cargo measurement more when there is a 0.1% variation in their respective reading?
- A. Ullage measurement
- B. Density measurement
- C. Temperature measurement
- D. Water in cargo measurement
9. Why water finding pastes or electronic tape interface reading to measure water in the take do not give accurate results?
- A. Due to emulsion
- B. Due to temperature difference
- C. Due temperature and density difference
- D. Due to differences in Viscosity
10. What are all the Claims/ disputes you can successfully defend if some records if maintained on board properly?
- A. Shortage, contamination and demurrage / dispatch disputes.
- B. Shortage, performance claims, and demurrage / dispatch disputes.
- C. Shortage, contamination, performance claims, and demurrage / dispatch disputes.
- D. Contamination performance claims, and demurrage / dispatch disputes.
11. What are the factors that may affect the calculation of OBQ value?
- A. Residues on tank floors, the age of the vessel and previous cargoes carried.
- B. Residues on tank floors and previous cargoes carried.
- C. Residues on tank floors and structures, and previous cargoes carried.
- D. Residues on tank floors and structures, and these will vary with the age of the vessel and previous cargoes carried.
12. What are all the cargo measurement issues creep up when liquid cargo is measured for volume calculations
- A. Ullage, listing of vessel, sea conditions, and temperature of cargo
- B. Ullage, listing of vessel, sea conditions, water in cargo and temperature of cargo
- C. Ullage, listing of vessel, sea conditions, water in cargo, density and temperature of cargo
- D. Ullage, listing of vessel, water in cargo, density and temperature of cargo
13. What can be the ship’s defence if the Oil discharged from board is more than the B/L figure?
- A. Water seepage into cargo onboard the ship
- B. The onboard quantity (OBQ) prior to loading has not been taken into consideration
- C. The cargo has been slightly over heated to reduce viscosity
- D. The flow meter on the shore at the discharge port is not working well
14. What are all the normal defence for the Ship, in case of an ‘Oil Shortage’
- A. To prove that all the cargo has been discharged with no (ROB).
- B. To prove that there was no significant in-transit loss
- C. To prove that the ship tank calibrations are more accurate than the shore tank calibrations.
- D. To prove that the shore’s flow meter is wrong
15. Why is it the potential for volumetric losses is greater where COW is performed?
- A. During COW, the cargo is being formed into a low pressure spray and completely atomised
- B. During COW, the cargo is being formed into a high pressure spray and completely atomised
- C. During COW, the cargo is being formed into a high pressure spray and partially atomised
- D. During COW, the cargo is being formed into a low pressure spray and partially atomised
16. When the sea conditions are not exactly calm, how will you make sure that the ullage measurement reading is closer to accurate?
- A. For each tank, take 5 ullage measurements and average, then apply trim correction
- B. For each tank, take 3 ullage measurements and average, then apply trim correction
- C. For each tank, take 5 ullage measurements, leave the maximum and minimum values, then average the remaining three values and apply trim correction
- D. For each tank, take 5 ullage measurements, leave the maximum and minimum values, then average the remaining three values.
17. Select the appropriate sentence from below describing the ‘Oil Shortage claim’
- A. The discrepancy between what has been received on board and what has been discharged from the ship
- B. The discrepancy between what has been received on board as per B/L and what has been discharged from the ship
- C. The discrepancy between the quantity of cargo as stated in the B/L and the out turn quantity as calculated in the discharge port.
- D. The discrepancy between the quantity of cargo as stated in the B/L and the out turn quantity as calculated in the discharge port after due consideration for the allowable transportation loss
18. How to find out ‘True in-Transit losses’ during the voyage?
- A. The ship’s gross volume at normal temperature on loading is compared with the ship’s gross volume at normal temperature prior to discharge
- B. The ship’s gross volume at atmospheric temperature on loading is compared with the ship’s gross volume at atmospheric temperature prior to discharge
- C. The ship’s gross volume at standard temperature on loading is compared with the ship’s gross volume at standard temperature prior to discharge
- D. The ship’s gross volume at atmospheric temperature & pressure on loading is compared with the ship’s gross volume at atmospheric temperature & pressure prior to discharge
19. What are all the records, if maintained onboard will assist in case of claims /disputes?
- A. Voyage abstract (deck), notice of readiness (NOR), port log, Cargo pumping/loading/transfer records and Oil record book including bunker operations
- B. Voyage abstract (deck and engine), notice of readiness (NOR), port log, Cargo pumping/ transfer records and Oil record book including bunker operations
- C. Voyage abstract (deck and engine), notice of readiness (NOR), port log, Cargo pumping/loading/transfer records and Oil record book.
- D. Voyage abstract (deck and engine), notice of readiness (NOR), port log, Cargo pumping/loading/transfer records and Oil record book including bunker operations
20. How to find out ‘Theoretical in-Transit losses’ during the voyage?
- A. The ship’s net volume on board at standard temperature on completion of loading is compared with the net volume on board at standard temperature prior to the commencement of discharge emptying and filling losses.
- B. The ship’s net volume on board at normal temperature & pressure on completion of loading is compared with the net volume on board at normal temperature & pressure prior to the commencement of discharge emptying and filling losses.
- C. The ship’s gross volume on board at standard temperature on completion of loading is compared with the net volume on board prior to the commencement of discharge emptying and filling losses.
- D. The ship’s net volume on board at standard temperature on completion of loading is compared with the gross volume on board at standard temperature prior to the commencement of discharge emptying and filling losses.
21. What are the international classification that describes petroleum liquid cargoes ?
- A. flammable and combustible
- B. volatile and non-volatile
- C. Organic and Inorganic
- D. Acidic and non-acidic
22. Petroleum liquids derived from the naturally occurring crude oil that may include the following
- A. Gasoline, Lubricant, Asphalt
- B. Phosphoric acid, Sulfuric acid, Hydrochloric acid
- C. Caustic soda, molten sulfur, Boric acid
- D. Tallow, grease, molasses
23. The EmS guide is given in
- A. Volume 1 of IMDG code
- B. Volume 2 of IMDG code
- C. IMDG code supplement
- D. SOLAS
24. MARPOL Annex I came into force in
- A. 1987
- B. 1983
- C. 1992
- D. 2003
25. How to reduce Hydrogen Sulphide Hazard in Residual Fuel Oils?
- A. Ventilation to lower the concentration of vapour in the ullage space and in specific areas where vapours may accumulate should be carried out as soon as practicable.
- B. Transfer the oil to some other tank using fuel transfer pump,
- C. Keep heating the oil to maintain a higher temperature
- D. Circulate the oil in the same tank using the fuel transfer pump
26. What is pressure surge ?
- A. When the pressure of oil increases suddenly at the manifold
- B. When the pressure of oil decreases suddenly at the manifold
- C. When the discharge pressure at the pump drops to zero
- D. A sudden increase in the pressure of the liquid in a pipeline brought about by an abrupt change in flow rate
27. Burning of candle is an example of ______________.
- A. rapid combustion
- B. spontaneous combustion
- C. slow oxidation
- D. explosion
28. What is flammable range ?
- A. The range in which nothing will burn
- B. The range in which the oxygen content is too low to cause explosion
- C. The range in which the oxygen content is too high to cause explosion
- D. The range of hydrocarbon gas concentrations in air between the lower and upper flammable limits. Mixtures within this range are capable of being ignited and of burning.
29. What is the eight-hour safe exposure limit for Carbon Monoxide?
- A. 15ppm
- B. 25ppm
- C. 125ppm
- D. 250ppm
30. What is Oxygen deficiency?
- A. Oxygen less than 21%
- B. Oxygen less than 16%
- C. Oxygen less than 8%
- D. Oxygen less than 5%
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