Turbofan engine employs ____________________ ? - PakMcqs

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1. 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...

2. In turbo fan engine, the jet velocity as compared to turbo-jet engine is_________________?

   A. less B. more C. same D. may be less or more depening upon speed E. none of the above...

3. The compression ratio in a jet engine varies proportional to ____________________?

   A. speed B. speed C. altitude D. Vspeed E. does not Vary...

4. Mining industry usually employs following motive power___________________?

   A. A.C. electric motor B. compressed air C. petrol engine D. diesel engine E. D.C. electric motor...

5. A jet engine works on the principle of conservation of____________________?

   A. mass B. energy C. flow D. linear momentum E. angular momentum...

6. The weight per horse power ratio for gas. turbine as compared to I.C. engine and steam turbine is________________?

   A. same B. higher C. lower D. uncomparable E. unpredictable...

7. Fighter bombers use following type of engine __________________?

   A. turbo-jet B. turbo-propeller C. rocket D. ram-jet , E. pulsojet...

8. 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 :...

9. In air breathing jet engine, the jet is formed by expanding__________________?

   A. gases B. solids C. liquid D. plasma E. highly heated atmospheric air...

10. 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...