AIGF Exit Exam • Set 2 Question 12 of 30
What is the temperature of the water used for the test above the nilductility transition temperature of the material?
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Direct Answer
Option 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.
All Options
A
below 30°C
B
equal to 30°C
C
above 30°C
D
at least 30°C
(Correct Answer)
Detailed Explanation & Context
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.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Ships subject to the IGF Code (AIGF).
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