The criterion of the thermodynamic efficiency for rotary compressor is_________________?

Related Mcqs:

1. 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

2. Rotary compressor is best suited for_____________________?

   A. large quantity of air at high pressure
   B. small quantity of air at high pressure
   C. small quantity of air at low pressure
   D. large quantity of air at low pressure
   E. any one of the above

3. Maximum delivery pressure is a rotary air compressor is of the order of__________________?

   A. 6 kg/cm2
   B. 10 kg/cm2
   C. 16 kg/cm2
   D. 25 kg/cm2
   E. 40 kg/cm2

4. 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

5. 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

6. The volumetirc efficiency of a compressor is calculated on the basis of __________________?

   A. volume of air inhaled at working conditions
   B. volume of air inhaled at N.T.P. conditions
   C. volume at 0°C and 1 kg/cm2
   D. volume at 20°C and 1 kg/cm2
   E. none of the above

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

   A. 0.1%
   B. 0.5%
   C. 1.0%
   D. 5%
   E. 10%.

8. 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%.

9. 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

10. 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