CHEMCO exit exam questions and answers — Set 3
Set 3 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 3 — 30 CHEMCO exit exam questions with answers
1. You are preparing to contain an oil spill. You must first receive approval from the coastal authorities prior to __________.
- A. employing a boom
- B. using suction equipment
- C. applying chemical agents
- D. deploying skimmers
2. Your vessel is taking on fuel when a small leak develops in the hose. You order the pumping stopped. Before you resume pumping, you should
- A. notify the terminal superintendent
- B. place a large drip pan under the leak and plug the scuppers
- C. repair the hose with a patch
- D. replace the hose
3. If you detect oil in the water around your vessel while discharging fuel, the FIRST thing to do is _________ .
- A. try to find out where the oil is coming from
- B. call the Master
- C. have the pumpman check the discharge piping
- D. shutdown operations
4. Containment and Damage Control: which step is of highest importance for spill/damage control?
- A. All personnel entering a contaminated space shall wear PPE
- B. Actions toward controlling the immediate spread of the spill
- C. For each pair entering a space, a trained person with appropriate equipment, will be on standby.
- D. Action steps minimizing the impact to the ship and crew.
5. What assigns for each new ship a calculable figure that will denote its total emissions of CO2 from combustion of fuel.
- A. Energy Efficiency Design Index
- B. Energy Inefficiency Design Index
- C. SOX Design Index
- D. VOX Design Index
6. When did Annex VI take effect?
- A. May 19, 2005
- B. October 12, 1991
- C. February 25, 1997
- D. July 3, 2015
7. The extent of MARPOL compliance is determined by:
- A. Vessel type, size and speed
- B. Vessel flag, type and age
- C. Vessel type, size and crew
- D. Vessel type, size and age
8. MARPOL applies to:
- A. applies to all ships, oil platforms, barges and private yachts
- B. tankers greater than 150GT and cargo ships greater than 400GT
- C. applies to all ships, oil platforms, barges and private yachts and hydrofoils
- D. applies to all ships, oil platforms, barges and private yachts and hovercrafts
9. When you have completed bunkering operations, the hoses should be _________.
- A. blown down with inert gas
- B. drained into drip pans or tanks
- C. stowed with their ends open for venting
- D. steam cleaned and flushed with hot water
10. What annex deals with regulations for the prevention of air pollution from ships?
- A. Annex IV
- B. Annex III
- C. Annex I
- D. Annex VI
11. What is the most important regulatory requirement for the master arriving at the lightering position?
- A. Lightering of Oil and Hazardous Material Cargoes Pre-arrival notices.
- B. Reporting of incidents.
- C. Designation of lightering zones.
- D. Factors considered in designating lightering zones.
12. Most minor spills of oil products are caused by
- A. equipment failure
- B. human error
- C. major casualties
- D. unforeseeable circumstances
13. Containment and Damage Control: identify which step is of the highest importance for personal protection?
- A. Don required PPE as determined from the MSDS. Contain liquid material using barriers, such as absorbents, rags or other equipment suitable to dam the flow.
- B. Fight fire (if any), being careful to use firefighting methods compatible with the material involved.
- C. Shut off or otherwise stem the spill at the source.
- D. Contain liquid material using barriers, such as absorbents, rags or other equipment suitable to dam the flow.
14. What is used to incinerate solid and liquid wastes arising from the operation of the ship?
- A. Incinerator
- B. Oily water separation
- C. ISM Screen
- D. Fire Sprinkler Cleaner
15. Oil Pollution Regulations require any transfer, or discharge of oil, or oily mixtures be recorded in the
- A. Pollution Control Record
- B. Bridge log
- C. Oil Record book
- D. Masters log
16. The Volatile Organic Compound (cargo vapor) Management Plan is required on what type of vessel?
- A. Tank sensors
- B. Container vessels
- C. Ro-ro vessels
- D. Crude Oil Carriers
17. Your vessel is carrying 24,000 barrels (3816 cubic metres) of oil for discharge. The cargo hoses have an inside diameter of eight inches. The container around the loading manifold must hold _________.
- A. three barrels
- B. four barrels
- C. six barrels
- D. eight barrels
18. It is generally NOT allowed to clean up an oil spill by using __________.
- A. a boom
- B. suction equipment
- C. chemical agents
- D. skimmers
19. The total quantity of oil discharged at sea on new tankers must not exceed:
- A. 1/15000 of the total quantity of that particular cargo of which the residue formed part
- B. 1/20000 of the total quantity of that particular cargo of which the residue formed part
- C. 1/25000 of the total quantity of that particular cargo of which the residue formed part
- D. 1/30000 of the total quantity of that particular cargo of which the residue formed part
20. A starting interlock in the ODME ensures
- A. the monitoring equipment is fully operational before commencing the discharge of the oil effluent at sea
- B. prevents malfunctioning of the system
- C. that an alarm is given off when the system malfunctions
- D. stops discharge of the oil effluent when the oil content exceeds 5 part per million
21. A gas venting system on a tanker that has gas lines in each tank connected to a common gas main running the full length of the ship is called:
- A. A gas-main system
- B. A common-main system
- C. A vent-main system
- D. An independent system
22. The inert gas is delivered to the cargo tanks by an inert gas deck main line. Find the correct labelling for the deck equipment items,
- A. 1-Pressure/Vacuum Valve; 2- Cargo tank valves; 3- Mast Riser; 4-Isolating Valve
- B. 1-Mast Riser; 2-Isolating Valve; 3-Cargo tank valves ; 4- Pressure/Vacuum Valve
- C. 1-Cargo tank valves; 2- Pressure/Vacuum Valve; 3- Mast Riser; 4-Isolating Valve
- D. 1-Isolating Valve; 2- Pressure/Vacuum Valve; 3- Mast Riser; 4-Cargo tank valves
23. Pneumatically Operating Valve; what is the most critical component for correct valve operation, based on your shipboard experience of running such a system?
- A. Valve orifice
- B. The Diaphragm
- C. Valve stem
- D. The valve springs
24. Advantages of using inert gas, pick one that is the main reason for its application,
- A. No explosive mixtures can form in the tank.
- B. Reduces corrosion.
- C. Voyage cleaning of tanks is unnecessary.
- D. Reduces pumping time because of positive pressure in the tanks.
25. Increasing rotation speed will decrease discharge pressure.
- A. 5%
- B. 3%
- C. 7%
- D. 10%
26. Cargo system Valves can be categorized in many ways: identify one operation that can be classified as, manual remote,
- A. Local or remote actuation: Local control means the operator is at the valve and controls it directly.
- B. When the valve is located some distance from the operator such as at the bottom of the cargo tank, it is then necessary to install a reach rod for remote actuation.
- C. A reach rod assembly is a series of steel rods coupled to connect the stem of the valve in the tank to a valve operating stand on deck.
- D. In automated cargo systems, the valves are frequently operated using hydraulic or pneumatic motors connected to the stem
27. Acidic solutions are formed in cargo tanks of tankers
- A. when sulphur compounds in oil cargoes react with water
- B. when sulphur compounds in oil cargoes react with oxygen
- C. when sulphur compounds in oil cargoes react with hydrocarbon gas
- D. when sulphur compounds in oil cargoes react with chemicals
28. Tank level measurement of free water by gauging tape and plumb bob: find the labeling combination that is correct,
- A. 1 Water Innage; 2-Water Cut; 3- Water Cut; 4- Water Ullage
- B. 1- Water Cut; 2- Water Innage; 3- Water Cut; 4- Water Ullage
- C. 1- Water Cut; 2- Water Innage; 3- Water Ullage; 4- Water Cut
- D. 1- Water Cut; 2- Water Cut; 3- Water Innage ; 4- Water Ullage
29. An inert gas generator burns what oil to generate inert gas ?
- A. Crude oil
- B. Gas oil
- C. Heavy oil
- D. Diesel oil
30. Back flow of inert gas is prevented by:
- A. An isolating valve
- B. The deck water seal
- C. A valve provided in the scrubber
- D. The deck mechanical non-return valve
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