Mining industry usually employs following motive power___________________? - PakMcqs

Related Mcqs:

1. Turbofan engine employs ____________________ ?

   A. one air stream B. two or more air streams C. no air stream D. solid fuel firing E. rocket principle for its operation...

2. 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...

3. An ideal air compressor cycle with clearance on p-v diagram can be represented by following processes_______________?

   A. one adiabatic, two isobaric, and one constant volume B. two adiabatic and two isobaric C. two adiabatic, one isobaric and one constant volume, D. one adiabatic, one isobaric and two constant volume E. two isobaric, two adiabatic and one constant volume...

4. Out of the following, from where you will prefer to take intake for air compressor_________________?

   A. from an air conditioned room maintained at 20°C B. from outside atmosphere at 1°C C. from coal yard side D. from a side where cooling tower is located nearby E. from any one of the above locations...

5. For slow-speed large capacity compressor, following type of valve will be best suited________________?

   A. poppet valve B. mechanical valve of the corliss, sleeve, rotary or semirotary type C. disc or feather type D. any of the above E. none of the above...

6. For supplying intermittent small quantity of air at high pressure, following compressor is best suited__________________?

   A. centrifugal B. reciprocating C. axial D. screw E. turbo jet...

7. Axial flow compressor has the following advantage over centrifugal compressor__________________?

   A. larger air handling ability per unit frontal area B. higher pressure ratio per stage C. aerofoil blades are used D. higher average velocities E. none of the above...

8. Turbo propeller has the following additional feature over the turbojet __________________?

   A. peopeller B. diffuser C. intercooler D. turbine and combustion chamber E. starting engine...

9. The effective power of gas turbines is increased by adding the following in compressor__________________?

   A. ammonia and water vapour B. carbon dioxide C. nitrogen D. hydrogen E. none of the above...

10. Which of the following plants is smallest and lightest for genrating a given amount of power__________________?

    A. steam power plant B. petrol engine C. diesel engine’ D. solar plant E. gas turbine plant...