Air-fuel ratio in a jet engine will be of the order of__________________? - PakMcqs

Related Mcqs:

1. 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...

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

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

3. In jet engines, for the efficient production of large power, fuel is burnt in an atmosphere of__________________?

   A. vacuum B. atmospheric air C. compressed air D. oxygen alone E. liquid hydrogen...

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

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

5. The air-fuel ratio in gas turbines is of the order of ______________________?

   A. 7 : 1 B. 15 : 1 C. 30 : 1 D. 40 : 1 E. 50: 1...

6. A closed gas turbine in which fuel is burnt directly in the air is not possible because of__________________?

   A. high pressure ratio B. increasing gas temperature C. high specific volume D. high friction losses E. paucity of 02...

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

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

8. 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...

9. 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...

10. In jet engines, paraffin is usually used as the fuel because of its _________________?

    A. high calorific value B. ease of atomisation C. low freezing point D. A. and C. above E. none of the above...