Rotary compressor is best suited for_____________________?

Related Mcqs:

1. Reciprocating air 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

2. 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

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. 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

5. Rotary compressors are suitable for ____________________?

   A. large discharge at high pressure
   B. low discharge at high pressure
   C. large discharge at low pressure
   D. low discharge at low pressure
   E. there is no such limitation

6. If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix i and o stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity______________?

   A. Vi=V0B
   B. Vt>V0
   C. U,<V0
   D. V,= U0
   E. Vri=Vm

7. The compressor capacity with decrease in suction temperature_________________?

   A. increases
   B. decreases
   C. remains unaffected
   D. may increase or decrease depending on compressor capacity
   E. increases upto certain limit and then decreases

8. The net work input required for compressor with increase in clearance volume_____________________?

   A. increases
   B. decreases
   C. remains same
   D. increases/decreases depending on com-pressor capacity
   E. unpredictable

9. 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

10. Losses in a centrifugal compressor are due to__________________?

    A. inlet losses
    B. impeller channel losses
    C. diffuser losses
    D. all of the above
    E. none of the above