CHEMCO exit exam questions and answers — Set 9
Set 9 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 9 — 30 CHEMCO exit exam questions with answers
1. It is possible to find the appropriate EmS SPILLAGE SCHEDULE from the
- A. Proper shipping name
- B. UN Number
- C. Packing group
- D. Packing instructions
2. Pyrophoric oxidation occurs when loading:
- A. Light crude oils
- B. Sour crude oils
- C. Refined products
- D. Chemical cargoes
3. Systemic poisons are those that cause an adverse health effect on------------
- A. the whole body
- B. several organs of the human body
- C. the skin only
- D. a specific organ
4. The products of combustion are
- A. carbon dioxide and water
- B. oxygen and water
- C. only carbon dioxide
- D. only oxygen
5. In the burning process hydrocarbon gases react with oxygen in the air:
- A. To produce carbon and water
- B. To produce hydrogen and water
- C. To produce carbon dioxide and water
- D. To produce carbon monoxide and water
6. Buildup of electrostatic charge when loading static accumulator oils is avoided by:
- A. Increasing the flow rate
- B. Not using natural fibre ropes in ullaging equipment
- C. Taking tank soundings within a metal sounding pipe
- D. Fitting, fixed equipment away from the tank wall
7. What is a resuscitator ?
- A. Equipment to revive an unconscious person
- B. To supply air to a person in a tank
- C. Equipment to restore the breathing of a person overcome by gas or lack of oxygen
- D. It is a rescue equipment for use in emergency
8. What is the TLV-TWA for hydrogen sulphide over a period of 8 hours ?
- A. 5 ppm
- B. 10 ppm
- C. 15 ppm
- D. 20 ppm
9. The International Medical Guide for Ships gives guidelines on how to diagnose, treat and prevent health problems in seafarers, mainly focusing on the first _____________ hours after injury.
- A. 6
- B. 48
- C. 12
- D. 24
10. When required to work in an area where explosive gases may accumulate, you should use tools which are
- A. approved by the Coast Guard
- B. high carbon steel
- C. fixed with a ferrous cover
- D. non-sparking
11. Multi-gas instruments are widely used and are usually capable of housing four different sensors. A typical configuration would comprise sensors for measuring: identify one that will be of major importance for enclosed space entry,
- A. Hydrocarbon vapor as a % LFL (explosimeter function using a pellistor sensor).
- B. Hydrocarbon vapor in inert gas as a % Volume (tankscope function using an infra-red sensor).
- C. Oxygen (using an electrochemical sensor).
- D. Hydrogen Sulfide (using an electrochemical sensor).
12. Tanker pump room ventilation must be switched on at least how many minutes before entry ?
- A. 10 minutes
- B. 15 minutes
- C. 30 minutes
- D. One hour
13. Which of the following hazards is the main concern when entering a ballast tank?
- A. toxic gases
- B. flammable gases
- C. infection
- D. lack of oxygen
14. A crew member is unconscious and the face is flushed. You should __________.
- A. lay the crew member down with the head and shoulders slightly raised
- B. administer a liquid stimulant
- C. lay the crew member down with the head lower than the feet
- D. attempt to stand the crew member upright to restore consciousness
15. A diffuse discharge from a single sharp conductor is called
- A. A spark
- B. A corona
- C. A brush discharge
- D. A Propagating brush discharge
16. What is the type of gas detection system fitted for spaces with air?
- A. Spot metering type fixed inside the individual insulation spaces
- B. Infrared type using sequential measurement
- C. Portable gas detection system due to mobility of this method
- D. Catalytic combustion type
17. Class B fires involve
- A. Solid cellulosic materials such as wood, paper, clothing, etc.
- B. Vapour/air mixture over the surface of flammable liquids
- C. Energised electrical equipment
- D. Combustible materials such as magnesium, sodium, etc.
18. Lower flammable limit (LFL) or Lower Explosive Limit (LEL), is usually expressed:
- A. as a percentage of the air volume
- B. as a percentage of hydrocarbon volume
- C. in volume percent
- D. as a percentage of the volume of oxygen
19. For Oxygen analyzer, identify the statement that explains the working principle
- A. Electrochemical Sensors: Analyzers of this type determine the oxygen content of a gas mixture by measuring the output of an electrochemical cell.
- B. Oxygen diffuses through a membrane into the cell and current flows between two special electrodes separated by a liquid or gel electrolyte.
- C. The current flow is related to the oxygen concentration in the sample and the scale is arranged to give a direct indication of oxygen content.
- D. The analyzer readings are directly proportional to the pressure in the measuring cell, and only small errors are caused by normal variations in atmospheric pressure.
20. The bypass valve on a self-contained breathing apparatus (SCBA) bypasses
- A. a breathing bag containing excessive pressure
- B. the regulator in an emergency
- C. oxygen to the atmosphere
- D. the regenerator in an emergency
21. A fuel tank is considered to be gas free when the tank is
- A. free of most flammable gas concentrations
- B. thoroughly ventilated for at least 24 hours
- C. inerted with carbon dioxide for 24 hours
- D. free of all dangerous concentrations of flammable or toxic gases
22. Which of the gases listed is the poisonous gas most likely to be found in a closed compartment involved in a fire?
- A. Nitrogen
- B. Hydrogen
- C. Carbon dioxide
- D. Carbon monoxide
23. Which type of cargoes are often known as static accumulator cargoes?
- A. Crude oil
- B. Vegetable oil
- C. Highly refined petroleum products
- D. Animal oil
24. What is the priority order of a Company's on board policies and procedures?
- A. Safety of the crew; Safe operation of the vessel; Protection of the environment
- B. Safe operation of the vessel; Safety of the crew; Protection of the environment
- C. Protection of the environment; Safety of the crew; Safe operation of the vessel
- D. Protection of the environment; Safe operation of the vessel; Safety of the crew
25. When preparing to pump flammable liquids with a centrifugal pump, you should
- A. draw a small quantity of liquid to prime the pump
- B. check for gland leakage and any fire hazard
- C. have a standby pump running with the discharge valve closed
- D. lift the relief valve by hand to check its operation
26. Certain operations can give rise to accumulations of electric charge which may be released suddenly in electrostatic discharges with sufficient energy to ignite
- A. Flammable hydrocarbon gas/air mixtures
- B. Flammable hydrocarbon gas/Nitrogen mixtures
- C. Combustible hydrocarbon liquid
- D. Flammable hydrocarbon gas/CO2 mixtures
27. How many portable multi – gas detectors should be carried onboard?
- A. At least one with methane gas and one of propane gas detection capability
- B. At least one with methane and one of carbon monoxides gas detection capability
- C. At least one with methane gas and one of ammonia gas detection capability
- D. At least two sets with methane gas detection capability
28. Class A fires involve
- A. Solid cellulosic materials such as wood, paper, clothing, etc.
- B. Vapour/air mixture over the surface of flammable liquids
- C. Energised electrical equipment
- D. Combustible materials such as magnesium, sodium, etc.
29. The ISM Code requires work procedures which ensures ________ performance
- A. Superior
- B. Profitable
- C. Safe
- D. Excellent
30. What is the procedure for checking for spinal cord damage in an unconscious patient?
- A. Beginning at the back of the neck, and proceeding to the buttocks, press the spine to find where it hurts
- B. Prick the skin of the hands and the soles of the feet with a sharp object to check for reaction
- C. Selectively raise each arm and each leg and watch patient's face to see if he registers pain
- D. Roll patient onto his stomach and prick along the length of his spine to check reaction
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