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BOEING 747 TEST QUESTIONS AND ANSWERS
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BOEING 747 TEST QUESTIONS AND ANSWERS...
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What is the Boeing 747's system count? ANSWER Each of the four distinctsystems is connected to an engine.
Every system has two parallel pumps in ______-ANSWER.
The ANSWER bleed air-driven pump is present in Systems 1 and 4.
ANSWER AC motor-driven pump is present in systems two and three.
What are the functions of AC-driven pumps and bleed air? ANSWER: Demand
pumps are controlled by the Demand Hydraulic Pump Switch and can be turned
on, off, or automated.
When is the AC-driven pump and bleed air used? If the system's demand
exceeds what the engine-driven pump can provide, then the answer
AC System Auxiliary-ANSWER installed to supply brake pressure while
towing in the NO. 4 system
System relief is at 3,500 psi; ANSWER is at 2,600 psi; low-pressure indication
is at 1,200 psi; and normal system pressure is at 3,000 psi.
Answer: Independent Reservoirs; No Interconnection; Numbers 1 and 4: 7.5
gallons; Numbers 2 and 3: Gallons of Fluid
ANSWER: Describe: Fluid Cooling Before the fluid is returned to the
reservoir, heat exchangers are positioned in the main fuel tanks to cool it.
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