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BIGF exit exam questions and answers — Set 4

Set 4 of the Basic Training for Ships subject to the IGF Code (BIGF) exit exam bank — 30 of 181 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 4 — 30 BIGF exit exam questions with answers

1. In production of chemical gases, By combining with nitrogen under high pressure and temperature in the presence of a catalyst __________ is produced.

  • A. hydrogen
  • B. carbondioxide
  • C. ammonia
  • D. vinyl chloride
Answer: C — ammonia
Ammonia is synthesized industrially via the Haber-Bosch process by reacting reformed hydrogen with atmospheric nitrogen under high pressure and temperature over an iron catalyst.

2. In IGF Code, L is the _______ as defined in the International Convention on Load Lines in force.

  • A. less
  • B. length
  • C. least
  • D. lower
Answer: B — length
Under the IGF Code, vessel Length (L) is defined in accordance with the International Convention on Load Lines in force.

3. In IGF Code, Length (L) is the length as defined in the ___________ in force

  • A. International Convention on Level Lines
  • B. Indian Convention on Load Lines
  • C. International Convention on Load Lines
  • D. Independent Convention on Load Lines
Answer: C — International Convention on Load Lines
The standard definition of ship length (L) in the IGF Code references the criteria specified under the International Convention on Load Lines.

4. In IGF Code, MARVS means

  • A. Minimum allowable relief value setting
  • B. Maximum allowable relief value setting
  • C. Minimum allowable relief valve setting
  • D. Maximum allowable relief valve setting
Answer: D — Maximum allowable relief valve setting
MARVS stands for Maximum Allowable Relief Valve Setting, the design pressure limit set on cargo/fuel tank pressure relief valves.

5. In IGF Code, MAWP means

  • A. Minimum allocated working pressure
  • B. Maximum allowable working pressure
  • C. Minimum allowable working pressure
  • D. Maximum allocated working pressure
Answer: B — Maximum allowable working pressure
MAWP stands for Maximum Allowable Working Pressure, the maximum gauge pressure permissible at the top of a tank or piping system in operational service.

6. In IGF Code, Membrane tanks means

  • A. an tank in which an explosive gas atmosphere a flammable gas or vapour is or may be expected to be present
  • B. an tank in which an explosive gas atmosphere or a flammable gas or vapour is present continuously or is present for long periods
  • C. self-supporting, do not form part of the ship's hull and are not essential to the hull strength
  • D. non-self-supporting tanks that consist of a thin liquid and gas tight layer membrane) supported through insulation by the djacent hull structure
Answer: D — non-self-supporting tanks that consist of a thin liquid and gas tight layer membrane) supported through insulation by the djacent hull structure
Membrane tanks are non-self-supporting fuel containment systems composed of a thin liquid and gas-tight metallic barrier supported through load-bearing insulation by the adjacent inner hull.

7. What is critical pressure?

  • A. The pressure at which a substance exists in the solid state at its critical temperature.
  • B. The pressure at which a substance exists in the liquid state at its critical temperature.
  • C. ATMOSPHERIC PRESSURE
  • D. none of the above
Answer: B — The pressure at which a substance exists in the liquid state at its critical temperature.
Critical pressure is the minimum pressure required to liquefy a gas at its critical temperature.

8. The pressure at which a substance exists in the _______ state at its critical temperature is called critical pressure.

  • A. semi solid
  • B. liquid
  • C. solid
  • D. vapour
Answer: B — liquid
Critical pressure represents the saturation pressure corresponding to the substance's critical point temperature where liquid and vapor phases become indistinguishable.

9. Explanation for critical pressure?

  • A. The pressure at which a substance exists in the liquid state at its critical temperature is called critical pressure.
  • B. both (a) and (b)
  • C. Critical pressure is the saturation pressure at the critical temperature.
  • D. none of the above
Answer: B — both (a) and (b)
At the critical point, the liquid and vapor densities become equal and no distinct phase boundary exists, regardless of additional pressure application.

10. Critical temperature is ________________

  • A. The temperature above which a semi solid cannot be liquefied by pressure alone.
  • B. The temperature above which a gas cannot be liquefied by pressure alone.
  • C. none of the above
  • D. The temperature above which a solid cannot be liquefied by pressure alone.
Answer: B — The temperature above which a gas cannot be liquefied by pressure alone.
Critical temperature is the maximum temperature above which a gas cannot be liquefied, no matter how much external pressure is applied.

11. ________________ is the temperature above which a gas cannot be liquefied by pressure alone.

  • A. Absolute temperature
  • B. Critical temperature
  • C. Critical pressure
  • D. Absolute pressure
Answer: B — Critical temperature
Above the critical temperature, a substance exists solely as a supercritical fluid and cannot be condensed into a distinct liquid phase by pressure alone.

12. ______________ is the endorsement issued by a flag state administration to a certificate of competency of a ship's officer allowing service on dangerous cargo carriers such as oil tankers, chemical tankers or gas carriers.

  • A. Bulk cargo
  • B. EXEMPTION
  • C. Dangerous Cargo Endorsement
  • D. Cargo containment system
Answer: C — Dangerous Cargo Endorsement
A Dangerous Cargo Endorsement (DCE) is a statutory endorsement issued by the maritime administration to an officer's Certificate of Competency for service on tankers or gas carriers.

13. Dangerous Cargo Endorsement is the endorsement issued by a flag state administration to a certificate of competency of a ship's office rallowing service on dangerous cargo carriers such as ______________

  • A. chemical tankers
  • B. gas carriers
  • C. All of the above
  • D. oil tankers
Answer: C — All of the above
Dangerous Cargo Endorsements are required under STCW regulations for certified officers serving on oil tankers, chemical tankers, and liquefied gas carriers.

14. Dangerous Cargo Endorsement is the endorsement issued by a flag state administration to a ______________ ship's officer allowing service on dangerous cargo carriers such as oil tankers, chemical tankers or gas carriers.

  • A. continuous discharge certificate
  • B. Indos
  • C. certificate of competency
  • D. none of the above
Answer: C — certificate of competency
A Dangerous Cargo Endorsement is formally attached to the officer's Certificate of Competency (CoC) upon satisfying mandatory STCW sea time and specialized training.

15. Density is the mass per unit volume of a substance at specified conditions of_________

  • A. temperature
  • B. none of the above
  • C. both (a) and (b)
  • D. pressure
Answer: C — both (a) and (b)
Density is the physical mass of a substance per unit volume (kg/m³), which varies as a function of temperature and pressure.

16. ________ is the mass per unit volume of a substance at specified conditions of temperaure and pressure.

  • A. Volume
  • B. Dew point
  • C. Density
  • D. Pressure point
Answer: C — Density
Density expresses the ratio of mass to volume of a fuel gas or liquid at standard reference temperature and pressure conditions.

17. ___________ is the temperature at which condensation will take place within a gas if further cooling occurs.

  • A. Flame
  • B. Enthalpy
  • C. Bleve
  • D. Dew point
Answer: D — Dew point
Dew point is the saturation temperature at which water vapor or hydrocarbon gas begins to condense into liquid droplets upon cooling at constant pressure.

18. Enthalpy is a ___________ measure of the total heat content of a lliquid at a given temperature.

  • A. equlibria
  • B. irreversible
  • C. reversible
  • D. thermodynamic
Answer: D — thermodynamic
Enthalpy is a fundamental thermodynamic state property representing the total heat energy content (internal energy plus pressure-volume work) of a substance.

19. Enthalpy is expressed in ____________

  • A. k joules per unit
  • B. k joules per 1 kg
  • C. k joules per M
  • D. k joules per volume
Answer: B — k joules per 1 kg
Specific enthalpy in maritime thermodynamics is standardly expressed in units of kilojoules per kilogram (kJ/kg).

20. In Enthalpy, for a liquid / vapour mixture, it will be seen that it is the sum of ________________

  • A. the latent heat of vaporization
  • B. the enthalpy of the liquid
  • C. none of the above
  • D. both (a) and (b)
Answer: D — both (a) and (b)
For a saturated liquid-vapor mixture, total enthalpy is the sum of liquid sensible enthalpy and the latent heat of vaporization multiplied by vapor quality.

21. Synonyms of methane is

  • A. marsh gas
  • B. LNG
  • C. natural gas
  • D. All of the above
Answer: D — All of the above
Methane (CH4) is also commonly known as marsh gas, firedamp, methyl hydride, or natural gas.

22. Synonyms of ethane is

  • A. methyl methane
  • B. dimethyl
  • C. bimethyl
  • D. All of the above
Answer: D — All of the above
Ethane (C2H6) is also referred to as bimethyl, dimethyl, or ethyl hydride.

23. Synonyms of n-butane is

  • A. iso butane
  • B. methlypropane
  • C. All of the above
  • D. normal butane
Answer: D — normal butane
n-Butane refers to normal butane (unbranched straight-chain C4H10 hydrocarbon).

24. Synonyms of i-butane is

  • A. methlypropane
  • B. none of the above
  • C. iso butane
  • D. both (a) and (b)
Answer: D — both (a) and (b)
Isobutane (i-butane) is 2-methylpropane, a branched constitutional isomer of butane.

25. Synonyms of ethylene is

  • A. bimethyl
  • B. dimethyl
  • C. propane
  • D. ethane
Answer: D — ethane
Ethylene is the IUPAC-recognized name ethene, an unsaturated hydrocarbon with a carbon-carbon double bond (C2H4).

26. Synonyms of propylene is

  • A. dimethyl
  • B. ethane
  • C. propane
  • D. bimethyl
Answer: C — propane
Propylene is systematically named propene, an unsaturated hydrocarbon with the chemical formula C3H6.

27. Synonyms of α butylene is

  • A. none of the above
  • B. But-1-ene
  • C. both (a) and (b)
  • D. ethyl ethylene
Answer: C — both (a) and (b)
Alpha-butylene refers to 1-butene (C4H8), an unsaturated terminal alkene monomer.

28. Under STCW Code Table A-V/3-1, what is the mandatory requirement regarding environmental protection and MARPOL standards during Basic IGF Code operations?

  • A. Optional adherence based on vessel size
  • B. Strict compliance with approved safety procedures and flag state regulations
  • C. Verbal recommendation without documentation
  • D. Applicable only during drydock operations
Answer: B — Strict compliance with approved safety procedures and flag state regulations
STCW Code Table A-V/3-1 mandates strict compliance with approved safety protocols for Basic IGF Code.

29. What specific safety precaution must be observed when managing environmental protection and MARPOL standards for Basic IGF Code on board?

  • A. Disabling automated safety alarms to save time
  • B. Conducting a thorough risk assessment and briefing all involved personnel prior to starting work
  • C. Proceeding without informing the officer on watch
  • D. Delegating tasks exclusively to untrained crew members
Answer: B — Conducting a thorough risk assessment and briefing all involved personnel prior to starting work
Risk assessments and pre-job briefings ensure all team members understand hazards during Basic IGF Code operations.

30. Which international regulation specifies the minimum standard for environmental protection and MARPOL standards concerning Basic IGF Code?

  • A. Port State Control advisory note only
  • B. International Load Line Certificate Annex 3
  • C. Tonnage Measurement Convention 1969
  • D. STCW Code Section A-V/3-1 and relevant SOLAS/MARPOL conventions
Answer: D — STCW Code Section A-V/3-1 and relevant SOLAS/MARPOL conventions
STCW Code Section A-V/3-1 sets international standards for training and operational competency in Basic IGF Code.

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