The volumetric efficiency of a compressor falls roughly as follows for every 100 m increase in elevation___________________?

Related Mcqs:

1. The volumetric efficiency of a compressor falls roughly as follows for every 5°C increase in atmospheric temperature__________________?

   A. 0.1%
   B. 0.5%
   C. 1%
   D. 5%
   E. 10%.

2. Volumetric efficiency of a compressor without clearance volume________________?

   A. increases with increase in compression ratio
   B. decreases with increase in compression ratio
   C. is not dependent upon compressin ratio
   D. may increase/decrease depending on compressor capacity
   E. unpredictable

3. Volumetric efficiency of a compressor with clearance volume ________________?

   A. increases with increase in compression ratio
   B. decreases with increase in compression ratio
   C. in not dependent upon compression ratio
   D. may increase/decrease depending on compressor capacity
   E. unpredictable

4. The vloumetric efficiency of compressor with increase in compression ratio will ___________________?

   A. increase
   B. decrease
   C. remain same
   D. may increase/decrease depending on clearance volume
   E. none of the above

5. Volumetric efficiency of air compressors is of the order of________________?

   A. 20-30%
   B. 40-50%
   C. 60-70%
   D. 70-90%
   E. 90-100%

6. Volumetric efficiency is_____________________?

   A. the ratio of stroke volume to clearance volume
   B. the ratio of the air actually delivered to the amount of piston displacement
   C. reciprocal of compression ratio
   D. index of compressor performance
   E. proportional to compression ratio

7. As the value of index ‘«’ is decreased, the volumetric efficiency will___________________?

   A. increase
   B. decrease
   C. remain unaffected
   D. may increase/decrease depending on compressor clearance
   E. none of the above

8. There is a certain pressure ratio (optimum) for a gas turbine at which its thermal efficiency is maximum. With increase in turbine temperature, the value of pressure ratio for the peak efficiency would__________________?

   A. remain same
   B. decrease
   C. increase
   D. unpredictable
   E. none of the above

9. The thermodynamic efficiency of rotary compressor is based on_______________?

   A. isothermal compression
   B. adiabatic compression
   C. isentropic compression
   D. polytropic compression
   E. none of the above

10. The criterion of the thermodynamic efficiency for rotary compressor is_________________?

    A. isentropic compression
    B. isothermal compression
    C. polytropic compression
    D. any one of the above
    E. none of the above