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