The pressure and temperature conditions of air at the suction of compressor are_________________?

Related Mcqs:

1. 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

2. 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

3. 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

4. The pressure in the air space above an oil (sp. gr. 0.8) surface in a tank is 0.1 kg/cm”. The pressure at 2.5 m below the oil surface will be __________________?

   A. 2 metres of water column
   B. 3 metres of water column
   C. 3.5 metres of water column
   D. 4 m of water column
   E. none of the above

5. If partial pressure of air and steam be pa and ps respectively in a condenser, then according to Dalton’s law, the pressure in condenser is equal to__________________?

   A. Ps-Pa
   B. pa-ps
   C. Pa+P
   D. non of these

6. 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

7. The capacity of a compressor is 5 m /mih. 5 m /min refers to_______________?

   A. standard air
   B. free air
   C. compressed air
   D. compressed air at delivery pressure
   E. air sucked

8. The basic constituents of Hastelloy are_________________?

   A. aluminium, copper etc
   B. nickel, molybdenum etc
   C. nickel, copper, etc
   D. all of the above
   E. none of the above

9. The diameters of fire tubes and superheaer tubes in locomotive boiler are_________________?

   A. 47.5 mm, 130 mm
   B. 32.5 mm, 180 mm
   C. 65.5 mm, 210 mm
   D. 24.5 mm, 65 mm

10. The fire tubes in, a Coarran and Scotish marine boiler are_________________?

    A. horizontal
    B. vertical
    C. inclined
    D. both horizontal and vertical
    E. horizontal and inclined