A. less
B. more
C. same
D. may be less or more depening upon speed
E. none of the above
Related Mcqs:
- A simple turbo-jet engine is basically_________________?
A. a propeller system
B. gas-turbine engine equipped with a propulsive nozzle and diffuse*
C. chemical rocket regine
D. ram-jet enigne
E. none of the above - In air breathing jet engine, the jet is formed by expanding__________________?
A. gases
B. solids
C. liquid
D. plasma
E. highly heated atmospheric air - The power available for take off and climb in case of turbojet engine as compared to reciprocating engine is ___________________?
A. less
B. more
C. same
D. may be less or more depending on ambient conditons
E. unpredictable - The jnaximum combustion pressure in gas turbine as compared to I.C. engine is_________________?
A. more
B. less
C. same
D. depends on other factors
E. unpredictable - A jet engine works on the principle of conservation of____________________?
A. mass
B. energy
C. flow
D. linear momentum
E. angular momentum - Air-fuel ratio in a jet engine will be of the order of__________________?
A. 10: 1
B. 15: 1
C. 20 : 1
D. 60 : 1
E. 100 : - The efficiency of jet engine is__________________?
A. higher at ground
B. higher at high altitudes
C. same at all altitudes
D. higher at high speed
E. lower at low speed - The compression ratio in a jet engine varies proportional to ____________________?
A. speed
B. speed
C. altitude
D. Vspeed
E. does not Vary - If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix i and o stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity______________?
A. Vi=V0B
B. Vt>V0
C. U,<V0
D. V,= U0
E. Vri=Vm - The air entry velocity m a rocket as compared to aircraft is_________________?
A. same
B. more
C. less
D. zero
E. dependent on power and speed
