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AIGF exit exam questions and answers — Set 8 — Advanced Training for Ships subject to the IGF Code

Set 8 of the Advanced Training for Ships subject to the IGF Code (AIGF) exit exam bank — 30 of 468 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 8 — 30 AIGF exit exam questions with answers

1. In gas turbine may be fitted in a gas-tight enclosure a ____________ in the gas supply piping may be accepted within this enclosure

  • A. pressure above 30 bar
  • B. pressure above 10 bar
  • C. pressure above 50 bar
  • D. pressure below 10 bar
Answer: B — pressure above 10 bar
When marine gas turbines are housed in gas-tight enclosures, fuel gas piping with pressures exceeding 10 bar may be approved within the ventilated enclosure.

2. What is the full redundancy for ventilation for the enclosure for ESD protected machinery spaces ?

  • A. 2x100% capacity fans from different electrical circuits
  • B. 2x200% capacity fans from same electrical circuits
  • C. 2x100% capacity fans from same electrical circuits
  • D. 2x200% capacity fans from different electrical circuits
Answer: A — 2x100% capacity fans from different electrical circuits
Ventilation for ESD-protected machinery enclosures must feature 100% redundancy with two independent extraction fans powered from separate electrical circuits.

3. Each __________ are fitted with an automatic shutdown device for high exhaust temperatures.

  • A. pelton wheel
  • B. none of the above
  • C. both (a) and (b)
  • D. turbine
Answer: D — turbine
IGF Code (gas turbines, 10.5): each turbine shall be fitted with an automatic shutdown device for high exhaust temperatures.

4. Fuel cells design are to ensure that any single failure in active components of the fuel cell system not lead to ____________

  • A. loss of propulsion
  • B. loss of efficiency
  • C. loss of manoeuring
  • D. loss of brake air
Answer: A — loss of propulsion
Marine fuel cell installations must be designed with redundancy so that a single failure in any active component will not result in total loss of vessel propulsion or steering.

5. To make a fuel cell space non hazardous, all fuel pipes are enclosed in a gas tight _________

  • A. loss of propulsion
  • B. double open space
  • C. single enclosure
  • D. ring space
Answer: C — single enclosure
A fuel cell space can be treated as non-hazardous when all fuel pipes in it are enclosed in a gas-tight enclosure (double-walled pipe or duct), so a leak cannot reach the space (IMO interim guidelines for fuel cell installations).

6. The fuel cell space is fitted with gas detection and an _______________ for Emergency ShutDown protected machinery spaces.

  • A. programmed shut down system
  • B. instructed shut down system
  • C. automatic shut down system
  • D. manual shut down system
Answer: C — automatic shut down system
Fuel cell compartments must be fitted with continuous gas detection systems and automated emergency shutdown (ESD) systems to isolate fuel upon leak detection.

7. For fuel cell systems with aggregate power ______________, the installation of the whole fuel cell system in the same compartment may be accepted by the Administration

  • A. lower than 375 kW
  • B. lower than 500 kW
  • C. lower than 775 kW
  • D. lower than 275 kW
Answer: A — lower than 375 kW
Small fuel cell systems with an aggregate power below 375 kW may be installed in a single compartment subject to approval by the Administration.

8. Fuel tanks located above the bulkhead deck shall be shielded with ________ insulation towards accommodation.

  • A. class A-120
  • B. class A-90
  • C. class A-60
  • D. class A-80
Answer: C — class A-60
Fuel tanks situated on open decks above the bulkhead deck must be shielded from accommodation spaces, service spaces, and control stations by A-60 class thermal insulation.

9. ______________used for refrigeration or cooling of fuel must be compatible with the fuel.

  • A. boiler
  • B. freezing
  • C. Refrigerants
  • D. Griller
Answer: C — Refrigerants
Refrigerants utilized in fuel reliquefaction and gas cooling systems must be chemically compatible with the fuel and non-reactive in the event of heat exchanger leakage.

10. Heat exchangers can be repaired on board without ___________

  • A. heat sources
  • B. external sources
  • C. power sources
  • D. internal sources
Answer: B — external sources
Plate and shell-and-tube fuel heat exchangers are arranged with isolation valves and bypasses to allow maintenance and tube cleaning on board without external assistance.

11. What is arranged to enable each fuel storage tank to be safely gasfreed and to be safely filled with fuel gas from a gas-free condition?

  • A. storage tank
  • B. Gas Combining Unit
  • C. heat exchangers
  • D. piping system
Answer: D — piping system
Dedicated piping connections must be provided to allow each fuel storage tank to be safely inerted, gas-freed with air, and re-gassed from a gas-free state.

12. Dry air only applicable for which type of tankvwhere condensation and icing due to cold surfaces is an issue?

  • A. cargo tanks
  • B. storage tanks
  • C. fuel tanks
  • D. liquid tanks
Answer: C — fuel tanks
Dry air purging is utilized to dry fuel tanks and hold spaces prior to gassing up to eliminate moisture and prevent ice formation on cryogenic surfaces.

13. The ship's motion shall include ______________

  • A. surge
  • B. heave
  • C. sway
  • D. All the above
Answer: D — All the above
Structural design of fuel tanks must account for all six degrees of ship motion: rolling, pitching, yawing, surging, swaying, and heaving.

14. What properties are adequate for the intended service to Thermal insulation and other materials used in liquefied gas fuel containment systems?

  • A. All the above
  • B. absorption of the liquefied gas fuel
  • C. solubility in the liquefied gas fuel
  • D. compatibility with the liquefied gas fuels
Answer: A — All the above
Under the IGF Code, thermal insulation and other materials in liquefied gas fuel containment systems must have properties adequate for the intended service, including compatibility with the liquefied gas fuel, solubility in it, and absorption of it. All the listed properties apply.

15. The properties for Thermal insulation the range should be how much

  • A. neutral
  • B. minimum
  • C. between temperature in service and 5°C below the minimum design temperature
  • D. zero
Answer: C — between temperature in service and 5°C below the minimum design temperature
Thermal insulation properties must be tested and certified across the temperature range between operational service conditions and 5°C below the minimum design temperature.

16. The properties for Thermal insulation and other materials including composites tested how much should be the minimum Design temperature should not be lower than__________

  • A. plus196°C
  • B. minus196°C
  • C. plus196°F
  • D. minus196°F
Answer: B — minus196°C
Materials used in cryogenic LNG fuel containment systems must be impact tested at design temperatures down to -196°C to verify ductility against brittle failure.

17. _________ refers to the usage of other power supply sources to feed power to the ship

  • A. alternate marine power system
  • B. ship marine power system
  • C. None of the above
  • D. alternate feed power system
Answer: A — alternate marine power system
Alternative Marine Power (AMP / Cold Ironing) supplies electrical power to the vessel from the shoreside grid while berthed, allowing auxiliary engines to be shut down.

18. _______ reduces the emission by the ship by a great margin

  • A. main marine power system
  • B. auxiliary marine power system
  • C. alternate marine power system
  • D. None of the above
Answer: C — alternate marine power system
Shore power connection (AMP) drastically reduces local port emissions of NOx, SOx, PM, and greenhouse gases while ships are berthed in port.

19. Alternate Marine Power provides powers to

  • A. lights
  • B. refrigerator
  • C. All of the above
  • D. air conditioner
Answer: C — All of the above
AMP supplies high-voltage electrical power to all shipboard consumers, including hotel loads, refrigeration, lighting, and auxiliary pumps.

20. Which type of vessel has got the biggest disadvantage with reference to Alternate Marine Power?

  • A. tanker
  • B. bulK carrier
  • C. passenger ships
  • D. container
Answer: A — tanker
Tankers face significant safety challenges with shore power connections due to hazardous area zoning and potential ignition risks during cargo operations.

21. Speed recovery solutions can save fuel upto

  • A. 1%
  • B. 20-30%
  • C. 2%
  • D. 4-11%
Answer: D — 4-11%
Speed reduction and operational efficiency measures (slow steaming and hull optimization) can deliver substantial fuel savings of 4% to 11% or more.

22. Coating is done to reduce ___________

  • A. air resistance
  • B. oil resistance
  • C. None of the above
  • D. hull sytems
Answer: A — air resistance
Aerodynamic superstructure fairings and low-friction hull coatings reduce aerodynamic and hydrodynamic resistance, improving overall vessel propulsive efficiency.

23. ________ is an engine for reduction of the vessels maximum speed to increase the efficiency by limiting the potential power output

  • A. over rating
  • B. rerating
  • C. None of the above
  • D. derating
Answer: D — derating
Engine derating involves limiting the maximum power rating of a marine engine to optimize its thermal efficiency and specific fuel consumption at lower operating speeds.

24. LNG fuel should have after treatment systems like ___________

  • A. oxidation catalyst
  • B. nitrogen catalyst
  • C. hydrogen catalyst
  • D. helium catalyst
Answer: A — oxidation catalyst
Methane oxidation catalysts (MOC) are exhaust aftertreatment devices designed to oxidize residual unburned methane (methane slip) in lean-burn gas engine exhausts.

25. _______ should have after treatment systems like oxidation catalyst

  • A. petrol
  • B. LNG fuel
  • C. coal
  • D. gas fuel
Answer: B — LNG fuel
LNG-fueled lean-burn Otto-cycle engines utilize oxidation catalysts to reduce carbon monoxide, unburned hydrocarbons, and methane slip.

26. Slow steaming is otherwise called

  • A. maxrating of the engine
  • B. rerating of the engine
  • C. derating of the engine
  • D. duerating of the engine
Answer: C — derating of the engine
Slow steaming is an operational strategy that involves reducing vessel transit speed and derating main engines to achieve significant fuel and emissions savings.

27. The cooling jacket of a hybrid turbo charger is made up of which material

  • A. aluminium
  • B. stainless steel
  • C. steel
  • D. silver
Answer: A — aluminium
The water-cooling jacket on high-speed hybrid turbocharger alternators is commonly fabricated from corrosion-resistant marine aluminum alloys.

28. GCU means ___________________

  • A. Gas Consumption Unit
  • B. Gas Combustion Unit
  • C. Goods Combustion Unit
  • D. Gas Combining Unit
Answer: B — Gas Combustion Unit
GCU stands for Gas Combustion Unit, a dedicated thermal oxidizer on LNG-fueled ships that safely burns excess boil-off gas when engines cannot consume it.

29. _____________ utilized for gas freeing of tanks may be provided externally to the ship.

  • A. Green gas
  • B. Non-Toxic gas
  • C. Toxic gas
  • D. Inert gas
Answer: D — Inert gas
Inert gas (such as liquid nitrogen) used for purging and gas-freeing fuel tanks may be supplied from shoreside tanker trucks during bunkering or drydocking.

30. Spaces surrounding fuel tanks is filled with which type of air?

  • A. vapour
  • B. cool air
  • C. moistured air
  • D. dry air
Answer: D — dry air
Hold spaces surrounding independent Type C fuel tanks are filled with dry air or inert gas and continuously monitored for pressure and flammable gas.

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