Type training · Boeing 737NG B1.1 · ATA 35, 38
Boeing 737NG B1.1: Oxygen, Water and Waste (ATA 35, 38)Type training questions & answers
Crew and passenger oxygen, potable water and heaters, water quantity, and the vacuum toilet system.
- A worked explanation on every question
- Written for the 737-600/700/800/900
- Read in English or 15 other languages
Sample Oxygen, Water and Waste questions with answers
Three questions from the free preview. Think of your answer first, then open the explanation.
1.What does a missing green disc on the 737NG fuselage near the crew oxygen bottle mean?
- A.The cylinder is due for its hydrostatic test
- B.The crew oxygen system is switched off
- C.Cylinder vented by overpressure
Show answer and explanation
Correct answer: C. Cylinder vented by overpressure
The green plastic discharge disc blows out when the cylinder vents from overpressure. Ref Boeing 737-600/700/800/900 training manual, ATA 35.
2.At what pressure does the 737NG crew oxygen frangible disc break?
- A.About 1,850 psig
- B.About 3,500 psig
- C.About 2,600 psig
Show answer and explanation
Correct answer: C. About 2,600 psig
If cylinder pressure gets to 2,600 psig the frangible disc breaks. Ref Boeing 737NG training manual, ATA 35.
3.What is the 737NG crew oxygen cylinder charge at 70°F?
- A.2,600 psig
- B.1,200 psig
- C.1,850 psig
Show answer and explanation
Correct answer: C. 1,850 psig
Nominal cylinder pressure is 1,850 psi at 70°F; servicing is by cylinder replacement. Ref Boeing 737NG training manual, ATA 35.
Part of the Boeing 737NG B1.1 airframe and systems course
One chapter of the Boeing 737NG B1.1 airframe and systems course question bank, for the 737-600/700/800/900, written in our own words for revision. Your type course and the aircraft maintenance manual stay the authority: limits and procedures can differ between airframes and operators.
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