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

Related Mcqs:

1. In a compressor, free air delivered is the actual volume delivered at the stated pressure reduced to ____________________?

   A. N.T.P. conditions
   B. intake temperature and pressure conditions
   C. 0°C and 1 kg/cm2
   D. 20°C and 1 kg/cm2
   E. none of the above

2. 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

3. Atmospheric pressure is 1.03 kg/cm and vapour pressure is 0.03 kg/cm . The air pressure will be_____________________ ?

   A. 1.03 kg/cm2
   B. 1.06 kg/cm2
   C. 1.00 kg/cm2
   D. 0.53 kg/cm2
   E. 0.5 kg/cm2

4. An ideal air compressor cycle without 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

5. 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

6. The following is true for an open cycle gas turbine having exhaust heat exchanger. Atmospheric air before entering the compressor is____________________?

   A. heated
   B. compressed air before entering the combustion chamber is heated
   C. bled gas from turbine is heated and readmitted for complete expansion
   D. exhaust gases drive the compressor
   E. part of exhaust gases are heated and mixed up with atmospheric air to utilise exhaust heat

7. The clearance volume of the air compressor is kept minimum because____________________?

   A. it allows maximum compression to be achieved
   B. it greatly affects volumetric efficiency
   C. it results in minimum work
   D. it permits isothermal compression
   E. none of the above

8. 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

9. An air compressor may be controlled by____________________?

   A. throttle control B. clearance control
   C. blow-off control
   D. any one of the above
   E. none of the above

10. The area of actual indicator diagram on an air compressor as compared to area of ideal indicator diagram is_____________________?

    A. less
    B. more
    C. same
    D. more/less depending on compressor capacity
    E. unpredictable