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REFRESHER exit exam questions and answers — Set 1

Set 1 of the Refresher Course for STCW Modular Courses (REFRESHER) exit exam bank — 30 of 88 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 1 — 30 REFRESHER exit exam questions with answers

1. Fire Triangle Fill up the blanks

  • A. Heat
  • B. Oxygen
  • C. All of Above
  • D. Fuel
Answer: C — All of Above
The fire triangle consists of three essential elements: fuel, heat, and oxygen. Removing any one of these elements will result in the extinguishment of the fire.

2. What is the minimum capacity of emergency fire pumps in meter cube per hour?

  • A. 15 meter cube per hour
  • B. 30 meter cube per hour
  • C. 25 meter cube per hour
  • D. 20 meter cube per hour
Answer: C — 25 meter cube per hour
Under SOLAS requirements for fire safety systems, the emergency fire pump must have a minimum capacity to deliver a specific volume of water, which is established as 25 cubic meters per hour for cargo ships.

3. What is the best fire extinguisher for electrical fires?

  • A. CO2
  • B. Foam
  • C. DCP
  • D. Water
Answer: A — CO2
CO2 is the preferred medium for electrical fires because it is non-conductive, leaves no residue, and effectively displaces oxygen without damaging sensitive electrical components.

4. What is the color of light used for smaller boats?

  • A. Green
  • B. White
  • C. Blue
  • D. Yellow
Answer: B — White
According to the COLREGs, white light is required for the all-round masthead and stern lights on smaller vessels to ensure visibility in all directions, acting as a navigational signal.

5. Fire extinguishing system required for propelling machines and diesel-driven motors:

  • A. CO2
  • B. Hyper mist
  • C. DCP
  • D. Foam
Answer: B — Hyper mist
Hyper mist (Water mist) systems are highly effective for engine room machinery as they cool the fire and provide localized protection without the oxygen-depleting risks of CO2.

6. How many hours should a diesel-driven fire pump run?

  • A. 18 hours
  • B. 14 hours
  • C. 12 hours
  • D. 16 hours
Answer: A — 18 hours
Under SOLAS requirements, the emergency fire pump must be capable of continuous operation for at least 18 hours to ensure sufficient firefighting capability during a prolonged emergency.

7. Dry chemical powder extinguisher works on what principle?

  • A. Cooling
  • B. Inhibition
  • C. Starvation
  • D. Smothering
Answer: B — Inhibition
Dry Chemical Powder (DCP) extinguishes fire primarily by chemical inhibition, where the powder interferes with the free radicals in the combustion chain reaction.

8. Maximum temperature of the unexposed side of a B class division:

  • A. 300 degrees centigrade
  • B. 350 degrees centigrade
  • C. 250 degrees centigrade
  • D. 400 degrees centigrade
Answer: C — 250 degrees centigrade
According to the FTP Code, the average temperature on the unexposed side of a B class division must not rise more than 225°C above initial, with a maximum of 250°C at any point.

9. DCP firefighting system is used in which types of vessels?

  • A. Chemical tankers
  • B. Bulk carriers
  • C. Oil tankers
  • D. Gas carriers
Answer: D — Gas carriers
DCP systems are primarily used on gas carriers because the powder is chemically inert and effectively tackles fires involving liquefied gases where other agents may be ineffective.

10. What is the maximum weight of a portable extinguisher?

  • A. 23 KG
  • B. 25 kgs
  • C. 12 kgs
  • D. 16 kgs
Answer: A — 23 KG
Portable fire extinguishers under SOLAS/FSS Code regulations are limited to a maximum mass of 23 kg to ensure they are manageable by a single crew member during an emergency.

11. Class A fire extinguisher is best used on:

  • A. Liquids
  • B. Metals
  • C. Gases
  • D. Solids
Answer: D — Solids
Class A fires involve ordinary combustible solids like wood, paper, and textiles. Water is the primary extinguishing agent as it provides a cooling effect.

12. In which language is the fire control plan written on board?

  • A. Any local language
  • B. Spanish
  • C. French
  • D. English
Answer: D — English
As per SOLAS requirements, the fire control plan must be written in the working language of the ship and in either English, French, or Spanish.

13. Automatic CO2 release system is for which space?

  • A. Accommodation
  • B. Engine room
  • C. None of the above
  • D. Main deck
Answer: C — None of the above
Automatic CO2 systems are not used in occupied spaces like the accommodation or engine room due to the extreme danger of suffocation to crew members.

14. How often should rescue boards be launched with their assigned crew and manning water?

  • A. Every month
  • B. Once in three months
  • C. Once in two weeks
  • D. Every week
Answer: B — Once in three months
SOLAS regulations require that rescue boats be launched with their assigned crew, and the boat must be maneuvered in the water at least once every three months.

15. Your vessel is in collision and you are not sure if your vessel is sinking. How will you handle the situation?

  • A. Leave the vessel and stay close by.
  • B. Wait and see the situation.
  • C. Search for missing persons, monitor the situation, prepare for abandonment if required.
  • D. Ensure the lifeboat has enough fuel to reach land.
Answer: C — Search for missing persons, monitor the situation, prepare for abandonment if required.
The primary response to a collision is to assess the damage and structural integrity. Monitoring the situation is crucial before committing to abandoning the vessel.

16. The visible range of parachute flares at nighttime is:

  • A. 25 nautical miles
  • B. 15 nautical miles
  • C. 10 nautical miles
  • D. 8 nautical miles
Answer: A — 25 nautical miles
According to LSA code, parachute flares are required to have a high intensity and visibility, capable of being seen at significant distances to alert SAR assets.

17. What should be done in case of a fire on board?

  • A. Reduce speed, keep the fire zone leeward.
  • B. Let the wind follow the fire to reduce oxygen.
  • C. Let the stem be up against the wind.
  • D. Continue on course and speed.
Answer: A — Reduce speed, keep the fire zone leeward.
Maneuvering to keep the fire leeward ensures that the wind blows smoke and flames away from the rest of the ship, assisting the fire-fighting team.

18. What is the full form of PASS in portable fire extinguishers?

  • A. Pull, Aim, Shut, Sit
  • B. Pull, Aim, Squeeze, Sweep
  • C. Pass, Aim, Sure, Speed
  • D. Power, Pull, Aim, Squeeze, Sweep
Answer: B — Pull, Aim, Squeeze, Sweep
PASS is the standard mnemonic for operating portable fire extinguishers: Pull the pin, Aim at the base, Squeeze the handle, and Sweep from side to side.

19. How should the painter of a life raft, which is fitted with an HRU, be secured to the ship?

  • A. It should not be secured in any way.
  • B. Directly to a secure point on the ship.
  • C. Secured via a weak link to a secure point.
  • D. Secured to a part of the hydrostatic release unit that is designed to break free.
Answer: C — Secured via a weak link to a secure point.
The painter is secured via a weak link so that if the vessel sinks, the raft will float free, and the link will break once the raft is inflated, preventing it from being dragged down.

20. Before lifting a lifeboat from water, it must be ensured that:

  • A. The engine is going astern.
  • B. The bottom plug is shipped.
  • C. Fall wires are clear and looped securely.
  • D. The anchor is streamed.
Answer: C — Fall wires are clear and looped securely.
Ensuring the fall wires are clear and looped securely prevents fouling or jamming, which could lead to accidental or uneven release during the recovery of the lifeboat.

21. What is the duration of an emergency escape breathing device (EBD)?

  • A. 12 minutes
  • B. 8 minutes
  • C. 5 minutes
  • D. 10 minutes
Answer: D — 10 minutes
EEBDs are designed for personnel to escape a fire-affected space; SOLAS requires them to have a service duration of at least 10 minutes.

22. A self-contained air breathing apparatus bottle with 1200 liters of air will last for how many minutes?

  • A. 25 minutes
  • B. 45 minutes
  • C. 30 minutes
  • D. 20 minutes
Answer: C — 30 minutes
Standard breathing rate is roughly 40 liters/min. A 1200-liter bottle lasts for 30 minutes (1200 / 40 = 30), accounting for standard consumption during fire operations.

23. The extinguisher that can be used for class F or class K fires is:

  • A. Wet chemical
  • B. Foam
  • C. CO2
  • D. Dry chemical powder
Answer: A — Wet chemical
Wet chemical extinguishers are specifically designed for Class F/K fires, typically involving cooking oils and fats, as they form a soap-like film to prevent re-ignition.

24. Oxygen removal stops fire by:

  • A. Starvation
  • B. Inhibition
  • C. Smothering
  • D. Cooling effect
Answer: C — Smothering
Smothering involves depriving the fire of oxygen, one of the primary elements of the fire triangle, thereby extinguishing the combustion process.

25. What is the fourth component of a fire tetrahedron?

  • A. Molecular chain reaction
  • B. Inhibition
  • C. Fire reaction
  • D. None of the above
Answer: A — Molecular chain reaction
The fire tetrahedron adds the 'Chemical Chain Reaction' to the classic fire triangle (Fuel, Heat, Oxygen), explaining why chemical inhibition is effective.

26. What is the color coding of a portable water extinguisher?

  • A. Blue
  • B. Signal red
  • C. Yellow
  • D. Cream
Answer: B — Signal red
Portable fire extinguishers are color-coded for identification. Under international standards, water extinguishers are identified by a signal red body color.

27. What is the length of a fireproof line of a self-contained air breathing apparatus?

  • A. 20 meters
  • B. 50 meters
  • C. 10 meters
  • D. 30 meters
Answer: D — 30 meters
SOLAS requires that the lifeline of a self-contained breathing apparatus must be fireproof and have a minimum length of 30 meters.

28. Which dangerous condition should be kept in mind after using a 15-pound CO2 fire extinguisher on a small oil fire on the engine room floor plates?

  • A. Possible suffocation from the CO2 gas.
  • B. Forgetting to secure the engine room ventilation system.
  • C. CO2 gas being drawn into nearby engine or air compressor intakes.
  • D. Rekindling of the fire.
Answer: D — Rekindling of the fire.
CO2 is not a cooling agent. After using it, the danger remains that the hot fuel or surfaces may cause the fire to reignite once the gas dissipates.

29. Which of the listed classes of fire is considered as one involving electrical equipment?

  • A. Class "C"
  • B. Class "D"
  • C. Class "B"
  • D. Class "A"
Answer: A — Class "C"
Class C fires involve energized electrical equipment. Using conductive agents like water would be hazardous, necessitating non-conductive agents like CO2.

30. Which of the following would be considered a Class “B” fire?

  • A. Electrical fire in a motor
  • B. Fire in the main switchboard
  • C. Waste rag fire in the engine room
  • D. Oil fire in the engine room bilges
Answer: D — Oil fire in the engine room bilges
Class B fires involve flammable liquids. Engine room bilges often contain oil, making them a prime location for Class B fire risks.

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