Inter cooling in compressors__________________?

Related Mcqs:

1. The ratio of useful power; engine friction exhaust gas losses; cooling water, air and oil losses for a diesel engine is of the order of____________________?

   A. 5:25:30:50
   B. 25:35:5:35
   C. 25:5:10:60
   D. 40:30:15:15
   E. 25:5:35:35

2. The cooling water requirement for diesel engine is of the order of________________?

   A. 0.2 to 1.0 liter per minute per h.p.
   B. 1 to 3 liters per minute per h.p.
   C. 5 to 10 liters per minute per h.p
   D. 10 to 20 liters per minute per h.p.
   E. 20-30 liters per minute per h.p

3. In petrol engine, increase of cooling water temperature will_________________?

   A. increase the knocking tendency
   B. decrease the knocking tendecny
   C. not affect the knocking tendency
   D. increase or decrease knocking tendency depedning on strength and time of spark
   E. unpredictable

4. Isothermal compression efficiency, even when running at high speed, can be approached by using A. multi-stage compression B. cold water spray C. both A. and B. above D. fully insulating the cylinder E. high stroke_________________?

   Isothermal compression efficiency, even when running at high speed, can be approached by using
   A. multi-stage compression
   B. cold water spray
   C. both A. and B. above
   D. fully insulating the cylinder
   E. high stroke

5. The overall isothermal eiffciency of compressor is defined as the ratio of_______________?

   A. isothermal h.p. to the BHP of motor
   B. isothermal h.p. to adiabatic h.p.
   C. power to drive compressor to isothermal h.p.
   D. work to compress air isothermally to work for actual compression
   E. isothermal work to ideal work

6. Maximum work is done in compressing air when the compression is_________________?

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

7. Standard air is the air at_____________________?

   A. atmospheric conditions at any specific location
   B. 20°C and 1 kg/cm2 and relative humidity 36%
   C. 0°C and standard atmospheric conditions
   D. 15°C and 1 kg/cm2
   E. 25°C, 1 kg/cm2 and RH of 60%.

8. 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

9. The work done per unit mass of air in compression will’be least when n is equal to______________?

   A. 1
   B. 1.2 ,
   C. 1.3
   D. 1.4
   E. 1.5

10. 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