Skip to content
DG Exit Exam
Home
Answer Key

AIGF exit exam questions and answers — Set 2

Set 2 of the Advanced Training for Ships subject to the IGF Code (AIGF) exit exam bank — 30 of 342 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.

Bank last rebuilt .

Practise these AIGF questions AIGF mock exit exam, 30 marks AIGF exit exam sets and syllabus

30 of 30 shown · Set 2

Nothing in this set matches that. Try a shorter word, or search the whole key.

Set 2 — 30 AIGF exit exam questions with answers

1. What is the minimum clear opening of horizontal openings?

  • A. no greater than 500 by 500 mm
  • B. no greater than 600 by 600 mm
  • C. no less than 600 by 600 mm
  • D. no less than 500 by 500 mm
Answer: C — no less than 600 by 600 mm
The minimum clear opening of horizontal access openings into fuel hold spaces and tank connection spaces under the IGF Code is not less than 600 mm by 600 mm.

2. What is the minimum clear opening of hatches or manholes through the length and breadth of the space?

  • A. less than 600 mm by 800 mm at the height of more than 600 mm from the bottom
  • B. not less than 600 mm by 800 mm at the height of not more than 600 mm from the bottom
  • C. not less than 600 mm by 800 mm at the height of more than 600 mm from the bottom
  • D. less than 600 mm by 800 mm at the height of not more than 600 mm from the bottom
Answer: B — not less than 600 mm by 800 mm at the height of not more than 600 mm from the bottom
For vertical access through the length and breadth of hold spaces, manholes must provide a minimum clear opening of not less than 600 mm by 800 mm at a sill height of not more than 600 mm.

3. In pump room, what are the basic things present?

  • A. continuous gas detection
  • B. both (a) and (b)
  • C. ventilation of the space
  • D. none of the above
Answer: B — both (a) and (b)
Fuel pump rooms contain cryogenic fuel pumps, vaporizers, relief valves, gas detectors, and dedicated mechanical ventilation systems.

4. Pressure relief systems is for which type of fuel tanks?

  • A. both (a) and (b)
  • B. high-flashpoint liquid fuel tanks
  • C. none of the above
  • D. low-flashpoint liquid fuel tanks
Answer: D — low-flashpoint liquid fuel tanks
Pressure relief systems are mandatory for all low-flashpoint liquid and compressed gas fuel tanks to prevent overpressurization exceeding design limits.

5. What test is for Type A independent tanks?

  • A. hydropneumatic test
  • B. hydrostatic test
  • C. both (a) and (b)
  • D. hydrodynamic test
Answer: C — both (a) and (b)
Type A independent tanks require structural design verification and complete hydrostatic or hydropneumatic testing alongside non-destructive examination (NDT).

6. For Type B tanks, the maximum primary membrane stress under test conditions of the yield will not _____________

  • A. exceed 90%
  • B. exceed 50%
  • C. not exceed 90%
  • D. not exceed 50%
Answer: C — not exceed 90%
For Type B independent tanks, the maximum primary membrane stress under test conditions must not exceed 90% of the material yield strength.

7. For Type B tanks, the maximum primary maximum bending stress under test conditions of the yield will not _____________

  • A. exceed 50%
  • B. not exceed 50%
  • C. not exceed 90%
  • D. exceed 90%
Answer: A — exceed 50%
For Type B independent tanks, the maximum primary bending stress under test conditions must not exceed 50% of the material yield strength.

8. For Type C tanks, What is the pressure vessel to a hydrostatic test at a pressure measured at the top of the tanks ?

  • A. not less than 1.5 Po
  • B. not greater than 2.5 Po
  • C. less than 1.5 Po
  • D. greater than 2.5 Po
Answer: A — not less than 1.5 Po
Type C independent pressure vessel tanks must undergo a hydrostatic pressure test at a pressure not less than 1.5 times the maximum design vapor pressure (1.5 Po).

9. What is the temperature of the water used for the test above the nilductility transition temperature of the material?

  • A. below 30°C
  • B. equal to 30°C
  • C. above 30°C
  • D. at least 30°C
Answer: D — at least 30°C
Water used for hydrostatic pressure testing of cryogenic tank materials must have a temperature of at least 30°C above the nil-ductility transition (NDT) temperature of the steel to prevent brittle fracture.

10. In Non destructive testing, What is the design temperatures?

  • A. colder than –500°C
  • B. colder than –200°C
  • C. colder than –10°C
  • D. colder than –300°C
Answer: C — colder than –10°C
Non-destructive testing (NDT) and impact toughness testing are mandatory for materials operating at design temperatures colder than -10°C.

11. During test, what is tested in valves?

  • A. operation of the valve
  • B. colour of the valve
  • C. length of the valve
  • D. width of the valve
Answer: A — operation of the valve
During factory and pre-commissioning testing of cryogenic valves, functional operation, seat tightness, and pressure containment are verified under operating temperatures.

12. Which type of test covers the fracture acceptable after a 180° bend?

  • A. Bend tests
  • B. Charpy V-notch impact tests
  • C. All of the above
  • D. Tensile tests
Answer: A — Bend tests
Bend tests of welded joints verify ductility and root soundness, requiring that no fracture or crack develops after undergoing a standard 180° guided bend.

13. What IS prevented in good mechanical strength?

  • A. prevent damage
  • B. none of the above
  • C. harmful
  • D. thermal expansion
Answer: A — prevent damage
Piping systems require adequate constructive mechanical strength and support to prevent mechanical damage, vibration fatigue, and structural deformation.

14. Mechanical strength is impracticable or would cause ________

  • A. lower local stresses
  • B. none of the above
  • C. excessive local stresses
  • D. no stress
Answer: C — excessive local stresses
Where excessive rigid piping supports would induce unacceptable thermal contraction stresses, flexible loops or expansion bellows are incorporated.

15. In allowable loads, liquid pressure surge during transfer operations cause

  • A. superimposed dead loads
  • B. live loads
  • C. superdead loads
  • D. superimposed loads
Answer: D — superimposed loads
Allowable piping loads account for superimposed forces, thermal contraction, and hydraulic pressure surges (water hammer) during rapid valve closure.

16. High pressure gas piping systems have ____________

  • A. sufficient destructive strength
  • B. sufficient constructive strength
  • C. insufficient constructive strength
  • D. insufficient destructive strength
Answer: B — sufficient constructive strength
High-pressure gas fuel piping systems (operating above 10 bar) must possess sufficient constructive strength and verified wall thickness to withstand extreme operating pressures.

17. High pressure gas piping systems are confirmed by carrying out stress analysis of

  • A. destresses due to the length of the piping system
  • B. stresses due to the length of the piping system
  • C. destresse due to the weight of the piping system
  • D. stresses due to the weight of the piping system
Answer: D — stresses due to the weight of the piping system
High-pressure gas piping stress analysis verifies that combined stresses resulting from internal pressure, thermal expansion, dynamic ship motions, and piping self-weight remain within permissible limits.

18. In allowable stress, When the design temperature is _________ a complete stress analysis all the stresses happens.

  • A. plus 1100 C
  • B. minus 2200 C
  • C. minus 110 C
  • D. plus 220 C
Answer: C — minus 110 C
For cryogenic fuel piping with design temperatures colder than -110°C, a comprehensive computerized thermal stress and flexibility analysis is required.

19. The arrangement and installation of gas piping provides the necessary flexibility to maintain the _________

  • A. abstinence of the piping system
  • B. division of the piping system
  • C. integrity of the piping system
  • D. cutting of the piping system
Answer: C — integrity of the piping system
Piping installation must provide sufficient flexibility through pipe bends, loops, and bellows to absorb thermal movements and preserve piping structural integrity.

20. _______________ comply with a standard acceptable to the Administration, taking into account the design pressure.

  • A. tubes
  • B. All of the above
  • C. Flanges
  • D. pipes
Answer: B — All of the above
All piping components, flanges, fittings, and valves must comply with recognized international standards approved by the Administration taking into account design pressure and temperature.

21. In Piping fabrication, for bellows and expansion joints used in vapour service, a ____________ than defined in is accepted.

  • A. lower minimum design pressure
  • B. higher minimum design pressure
  • C. higher maximum design pressure
  • D. lower maximum design pressure
Answer: A — lower minimum design pressure
For bellows and expansion joints in low-pressure vapor service, a lower minimum design pressure may be accepted where protected by upstream relief devices.

22. In Piping fabrication, All valves and expansion joints used in ____________

  • A. high pressure gas systems
  • B. low pressure gas systems
  • C. low pressure pipe system
  • D. high pressure pipe system
Answer: A — high pressure gas systems
All valves, expansion joints, and fittings used in high-pressure gas fuel systems must be type-approved by the Administration for the intended pressure and temperature.

23. In Piping fabrication, The piping system shall be joined by welding with a ____________

  • A. maximum of tanks connections
  • B. maximum of flange connections
  • C. minimum of tanks connections
  • D. minimum of flange connections
Answer: D — minimum of flange connections
Gas fuel piping systems must be joined primarily by butt welding with a minimum number of flanged connections to reduce potential leak paths.

24. In Piping fabrication, Gaskets shall be protected against ____________

  • A. mild occurance
  • B. light
  • C. blow-out
  • D. All of the above
Answer: C — blow-out
Flange gaskets in gas fuel piping must be constructed of blowout-proof spiral-wound metallic or composite materials to prevent catastrophic gasket failure.

25. In Piping fabrication, ____________ are protected against blow-out.

  • A. nut
  • B. liner
  • C. seal
  • D. Gaskets
Answer: D — Gaskets
Gaskets in cryogenic and pressurized gas fuel service must be protected against blowout by tongue-and-groove or raised-face spigot flange construction.

26. Piping fabrication and joining details shall comply with ___________

  • A. parallel connections
  • B. Indirect connections
  • C. Direct connections
  • D. Diverted connections
Answer: C — Direct connections
Direct piping connections and fabrication details must strictly comply with recognized classification society rules and IGF Code standards.

27. In Expansion joints of Piping fabrication, Where bellows and expansion joints are provided in accordance with _____________

  • A. bellows shall be protected against icing
  • B. bellows are removed
  • C. bellows are disconnected
  • D. bellows shall be unprotected against icing
Answer: A — bellows shall be protected against icing
Where expansion bellows are installed in open deck piping, they must be protected by external sheaths to prevent icing and physical damage.

28. In Expansion joints of Piping fabrication, In other connections,___________ is joined in accordance but for other exceptional cases the Administration or its Recognized Organization may consider alternative arrangements.

  • A. Piping connections
  • B. presssure gauge
  • C. steel joints
  • D. temperature meter
Answer: A — Piping connections
Piping connections must be fabricated in accordance with approved welding procedures; alternative mechanical joints require special consideration by the Administration.

29. In Direct connections of Piping fabrication, ____________ with complete penetration at the root may be used in all applications

  • A. lap joints
  • B. corner joints
  • C. U-groove weld
  • D. Butt-welded joints
Answer: D — Butt-welded joints
Full-penetration butt-welded joints with 100% root penetration are approved and preferred for all fuel piping applications.

30. In Direct connections of Piping fabrication, For design temperatures colder than__________ butt welds will be either double welded or equivalent to a double welded butt joint.

  • A. plus 5000°C
  • B. minus 10°C
  • C. plus 100°C
  • D. minus 500°C
Answer: B — minus 10°C
For design temperatures colder than -10°C, butt welds must be double-welded or equivalent full-penetration welds subject to 100% volumetric non-destructive testing.

Printing this? Use your browser's Print (Ctrl/⌘ + P) — the buttons, the search box and the site chrome drop out and the questions run on as plain text, so a set fits a few pages. Filter to one set first if you only want that set on paper.

Practise these AIGF questions as a timed paper All 342 AIGF questions and answers AIGF exit exam sets and syllabus All 27 STCW exit exam courses