GASCO Exit Exam • Set 7 Question 3 of 30

Which flammability diagram is used to observe change in cargo tank atmosphere for an LNG gas carrier?

✓

Direct Answer

Option D: Methane, oxygen and nitrogen mixtures

The correct answer is Methane, oxygen and nitrogen mixtures. This complies with established gas tanker operational standards, thermodynamics, and the IGC Code safety requirements.

All Options

Methane and nitrogen mixtures

Methane and oxygen mixtures

Methane and air mixtures

Methane, oxygen and nitrogen mixtures (Correct Answer)

Detailed Explanation & Context

The correct answer is Methane, oxygen and nitrogen mixtures. This complies with established gas tanker operational standards, thermodynamics, and the IGC Code safety requirements.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Liquefied Gas Tanker Cargo Operations (GASCO).

Practice Full GASCO Set 7

Test yourself with 30 interactive questions, live timer, and instant score.

Launch Practice Simulator →

Question Discussion & Notes

Have a doubt, memory trick, or exam update? Share your insights with fellow mariners.

Loading mariner discussions...

« Previous Question Next Question »

More Questions in GASCO Set 7

View All 30 →

Q1 What is the use of a Distributed Control System (DCS) onboard an LNG carrier? Q2 Which of the following is not a sign of an LNG gas (vapor) leak into insulation spaces? Q3 How is intrinsic safety achieved for electrical circuits used in hazardous areas? Q4 Why is the 'maximum surface temperature' identified, for electrical equipment used in hazardous areas onboard LNG carriers? Q5 What can major failure of primary membrane lead to? Q6 Based on the principles of segregation, what would you classify electric motor room? Q7 How will you measure methane concentration inside insulation spaces? Q8 For the LNG NO 96 containment system, why is the cargo tanks secondary insulation spaces pressure maintained slightly higher than primary insulation spaces? Q9 How do you remove water from the secondary insulation space? Q10 If insulation damage occurs, how does filling the ballast tanks with sea water help in maintaining the hull steel temperature?