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Aircraft Design
Aircraft Design Multiple Choice
Quiz 1
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Q.1
If area ratio is 1.then, at which mach number flow is flowing?
a) 0.68
b) 1.89
c) 2
d) 0.21
Q.2
What is the function of a typical nozzle?
a) To expand exhaust flow
b) To reduce flow velocity
c) To generate lift to fly
d) To increase pressure
Q.3
Performance of engine can be controlled by nozzle.
a) True
b) False
Q.4
Following diagram represents ______________
a) fixed convergent nozzle
b) fixed divergent nozzle
c) cd nozzle
d) rocket engine
Q.5
Only convergent section will be used for supersonic speeds.
a) True
b) False
Q.6
Consider a flow with 0.5M. Now, as area decreases, velocity of the flow inside convergent section _____________
a) increases
b) decreases
c) reduces by half always
d) velocity is independent of area
Q.7
Following diagram represents ___________
a) preliminary sizing of capture area
b) lift curve
c) drag polar
d) drag coefficient curve
Q.8
Our designed Mach number is 0.Find the required area ratio for the design. Assume isentropic relation is valid.
a) 1.038
b) 3.45
c) 5.64
d) 0.12
Q.9
____________ is the most common type of boundary layer diverter used for supersonic applications.
a) Channel diverter
b) Empennage
c) Aileron
d) Elevator
Q.10
Following diagram represents __________
a) cd nozzle
b) convergent nozzle
c) divergent nozzle
d) constant area nozzle
Q.11
At exhaust of nozzle temperature isand density of the flow is 1.kg/mIf back pressure is 1 bar then, nozzle is ______________
a) nozzle can be under or over expanded
b) under expansion
c) over expanded
d) design condition
0 h : 0 m : 1 s
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