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MEK exit exam questions and answers — Set 6

Set 6 of the Marine Engineering Knowledge (MEK) exit exam bank — 30 of 195 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 6 — 30 MEK exit exam questions with answers

1. Ballast tank on a ship are filled up with _____

  • A. water from other tanks
  • B. drinking water
  • C. sea water
  • D. cargo oil
Answer: C — sea water
Ballast tanks are filled with sea water to maintain the ship's stability, trim, and draft requirements. This allows the ship to operate safely even when not carrying a full cargo load.

2. Settling tanks on ship are provided for

  • A. storing oils before its use
  • B. filtering water from fuel oil
  • C. allowing water and sludge to separate before oil seperator
  • D. mixing oils before use
Answer: C — allowing water and sludge to separate before oil seperator
Settling tanks provide the residence time necessary for water and sludge to settle at the bottom of the fuel. This separation process ensures that the fuel oil purifier receives cleaner oil for final treatment.

3. While bunkering is going on, what will be the most important thing to monitor

  • A. Oil sounding in bunker barge
  • B. Temperature of oil being supplied
  • C. Oil sample is being taken
  • D. Oil sounding in the tank being filled
Answer: D — Oil sounding in the tank being filled
Monitoring the tank sounding is critical during bunkering to prevent overflows. Preventing spills is a high priority for MARPOL compliance and shipboard safety, requiring constant vigilance of tank levels.

4. Quick Closing Valves can be operated...

  • A. All of the above
  • B. Locally
  • C. Pneumatically
  • D. Remotely
Answer: A — All of the above
Quick closing valves are versatile safety devices designed for emergency operations. They can be closed locally by hand or remotely via pneumatic or hydraulic systems to ensure maximum safety in diverse fire scenarios.

5. Each tank is required to have at least the following

  • A. Sounding Pipe
  • B. All of the above
  • C. Outlet Line
  • D. Air Vent
Answer: B — All of the above
Each tank requires an outlet line for discharge, an air vent to prevent over-pressurization during filling, and a sounding pipe to manually check levels. As all these components are fundamental for safe tank operation, 'All of the above' is the correct answer.

6. Storage Tank in the engine room will be called as ______ if the tank capacity is in between 2-50 tonnes

  • A. Large Tank
  • B. Ballast Tank
  • C. Medium Tank
  • D. Small Tank
Answer: D — Small Tank
Under standard maritime nomenclature for engine room storage containers, tanks with a capacity ranging between 2 and 50 tonnes are classified as Small Tanks.

7. On finding an injured person in the engine room, your first action will be to

  • A. bring a stretcher
  • B. report to the duty officer on watch
  • C. look for the cause of injury
  • D. apply first aid
Answer: B — report to the duty officer on watch
Safety procedures prioritize immediate communication. Reporting to the duty officer ensures help is mobilized quickly and proper emergency procedures are activated without delay, which is the primary duty before attempting independent medical aid.

8. A fire alarm in the engineroom is activated

  • A. due to fire in the engine room
  • B. due to a black out
  • C. from the bridge
  • D. automatically on machinery failure
Answer: A — due to fire in the engine room
A fire alarm in the engine room is specifically triggered by fire detection sensors (heat or smoke) identifying an active fire, requiring immediate emergency response protocols.

9. On hearing a CO2 alarm in the engine room, your first action will be

  • A. use large fire extinguisher on the fire
  • B. raise fire alarm
  • C. report to the duty officer on watch
  • D. use emergency exit to get out
Answer: D — use emergency exit to get out
A CO2 fire extinguishing system releases asphyxiating gas into the engine room space. Therefore, the immediate priority upon hearing the warning alarm is to evacuate via the emergency exit to avoid suffocation.

10. A machinery failure alarm in the engine room is activated

  • A. automatically on machinery failure
  • B. due to collision of the ship
  • C. due to fire in the engine room
  • D. from the bridge
Answer: A — automatically on machinery failure
Machinery failure alarms are designed to alert engineers to faults in running equipment (e.g., low lube oil pressure or high jacket water temperature). These are generated automatically by monitoring systems.

11. A general alarm is activated

  • A. from the bridge
  • B. automatically on machinery failure
  • C. due to black out
  • D. due to high bilge level
Answer: A — from the bridge
The General Alarm (GA) is the highest-level emergency signal on a ship. It is manually activated from the bridge by the master or duty officer to alert all personnel of an emergency situation requiring mustering.

12. UMS stands for

  • A. Under Machinery Space Operation
  • B. Uniform Machinery Space Operation
  • C. Unattended Machinery Space Operation
  • D. Undermanned Machinery Space Operation
Answer: C — Unattended Machinery Space Operation
UMS refers to Unattended Machinery Space operations, where the engine room is not manned by engineers on a watch-keeping basis, relying instead on comprehensive alarm and monitoring systems.

13. Which of the following is NOT an audio visual alram

  • A. Fire Alarm
  • B. Ship security alarm
  • C. Co2 Alarm
  • D. Machinery Alarm
Answer: B — Ship security alarm
The Ship Security Alarm (SSAS) is a covert, silent alarm system used to alert authorities of piracy or security threats, intentionally excluding audible or visual indicators to protect the crew.

14. How frequently must operational drills and practical checks for containment, isolation, and emergency response be conducted for Marine Engineering Knowledge?

  • A. Only when requested by port State control inspectors
  • B. At least monthly or as mandated by SOLAS and shipboard safety management system (SMS)
  • C. Annually prior to vessel drydocking
  • D. Once every 5 years during special survey
Answer: B — At least monthly or as mandated by SOLAS and shipboard safety management system (SMS)
Regular drills maintain crew emergency readiness and satisfy SOLAS requirements.

15. Emergencies that can occur in the Engine room

  • A. Flooding of the engine room
  • B. All of the above
  • C. Crank case explosion
  • D. Stoppage of Main engine
Answer: B — All of the above
Crankcase explosions, main engine failure, and flooding are all critical operational emergencies requiring immediate intervention to maintain ship safety and environmental compliance.

16. Fixed fire fighting system for engine room

  • A. DCP
  • B. inert gas
  • C. nitrogen
  • D. CO2
Answer: D — CO2
Fixed CO2 systems are the industry standard for engine room fire suppression due to the gas’s ability to reach inaccessible areas and effectively smother Class B and C fires without leaving residues.

17. Not a part of a fire triangle

  • A. air
  • B. electricity
  • C. heat
  • D. fuel
Answer: B — electricity
The fire triangle consists of fuel, heat, and oxygen. Electricity is an energy source that may ignite fuel but is not an element of the triangle itself.

18. Main fire pump is located

  • A. at the fire station
  • B. in the steering flat
  • C. in the engine room
  • D. on main deck
Answer: C — in the engine room
Under SOLAS regulations, the main fire pumps must be located within the machinery space to be readily available for engine room firefighting, distinct from the emergency fire pump.

19. To fight an electric fire you would use

  • A. steam jet
  • B. water spray
  • C. dry powder
  • D. special foam
Answer: C — dry powder
Dry powder is an electrical non-conductor and is the preferred medium for Class C electrical fires to suppress flames without damaging equipment or risking electrocution to the operator.

20. Means of forcing water out of a portable extinguisher

  • A. nitrogen cartridge
  • B. CO2 cartridge
  • C. air cartridge
  • D. chemical cartridge
Answer: B — CO2 cartridge
Most portable fire extinguishers on board use a pressurized gas cartridge, such as CO2, to expel the contents from the canister onto the fire source.

21. High expansion foam system is suitable for fighting fires in

  • A. cargo holds
  • B. engine room
  • C. accommodation
  • D. deck of ship
Answer: B — engine room
High expansion foam systems are specifically designed to fill large, confined volumes like engine rooms, effectively displacing oxygen and cooling surfaces to extinguish major fires.

22. Which of the following provided for connecting to shore water supply

  • A. fixed foam system
  • B. international shore connection
  • C. fire hydrant
  • D. foam tank
Answer: B — international shore connection
The International Shore Connection (ISC) is a standardized flange required by MARPOL/SOLAS regulations to allow port authorities to connect their shore water supply to the ship's fire main.

23. The emergency fire pump on a ship is located

  • A. at the boat deck
  • B. at the poop deck
  • C. inside the engine room
  • D. outside the engine room
Answer: D — outside the engine room
The emergency fire pump is specifically located outside the engine room to ensure that, in the event of a total engine room fire, a firefighting water supply remains available.

24. Fire hose on ship are made of

  • A. thick cloth
  • B. flexible teel
  • C. strong canvas
  • D. leather
Answer: C — strong canvas
Fire hoses used on ships must be flexible and durable; they are constructed from high-strength canvas or synthetic fabric to withstand high pressure and environmental wear.

25. What is used in case the fire in the engine room becomes out of control

  • A. portable fire extinguisher
  • B. fixed CO2 fire extinguishing system
  • C. fire pumps and hoses
  • D. 45 liters foam fire extinguisher
Answer: B — fixed CO2 fire extinguishing system
Fixed CO2 fire extinguishing systems are designed for total flooding of the engine room when a fire is beyond the capacity of portable equipment or localized firefighting systems.

26. Which one of the following will be used first on a small fire in the engine room

  • A. fire blancket
  • B. fire pumps and hoses
  • C. portable fire extinguisher
  • D. fixed fire extinguishing system
Answer: C — portable fire extinguisher
Portable fire extinguishers are the initial line of defense for small, localized fires, allowing for immediate action before a fire can propagate across the engine room.

27. Full form of PASS....Mark the correct one

  • A. Push, Automatic, Sweep, Squeeze
  • B. Pull, Aim, Smoke,
  • C. Pull, Aim, Sponge, Sweep
  • D. Pull, Aim, Squeeze, Sweep
Answer: D — Pull, Aim, Squeeze, Sweep
PASS is the universal acronym for operating a portable fire extinguisher: Pull the pin, Aim at the base of the fire, Squeeze the handle, and Sweep from side to side.

28. Following is not a part of Fire detection system

  • A. Heat Detector
  • B. Body Detector
  • C. Smoke Detector
  • D. Flame Detector
Answer: B — Body Detector
Fire detection systems utilize sensors for heat, smoke, and flame. A 'body detector' is not a component of maritime fire detection equipment.

29. Which Instrument is used for testing Insulation

  • A. Jagger
  • B. Driver
  • C. Megger
  • D. Drager
Answer: C — Megger
A Megger (megohmmeter) is the standard electrical test instrument used to measure the insulation resistance of electrical cables and windings.

30. Before starting maintenance on any equipment, following precautions to be taken...Mark the incorrect one

  • A. Remove the safety guards
  • B. Put a warning notice on the Mains switch
  • C. Switch on the main supply
  • D. Switch off the machine
Answer: C — Switch on the main supply
Switching on the main supply during maintenance is dangerous and violates all LOTO (Lock-Out, Tag-Out) safety protocols, which strictly mandate isolation of power to prevent accidental energization.

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