Axial flow compressor resembles____________________ ?

Related Mcqs:

1. Axial flow compressor has the following advantage over centrifugal compressor__________________?

   A. larger air handling ability per unit frontal area
   B. higher pressure ratio per stage
   C. aerofoil blades are used
   D. higher average velocities
   E. none of the above

2. The maximum compression ratio in an actual single stage axial flow comperssor is of the order of________________?

   A. 1 : 1.2
   B. 1 : 2
   C. 1 : 5
   D. 1 : 10
   E. 1 : 1

3. The degree of reaction of an axial flow turbine is the ratio of isentropic temperature drop in a blade row to the_____________________?

   A. adiabatic temperature drop in the stage
   B. total temperature drop
   C. total temperature drop in the stage
   D. total adiabaitc temperature drop
   E. difference of maximum and minimum temperature in the cycle

4. In the axial flow gas turbine, the work ratio is the ratio of____________________?

   A. compressor work and turbine work
   B. output and input
   C. actual total head tempeature drop to the isentrpic total head drop from total head inlet to static head outlet
   D. actual compressor work and theoretical comprssor work
   E. none of the above

5. The pressure ratio of an ideal vaned compressor with increase in mass flow rate_________________?

   A. increases
   B. decreases
   C. remains constant
   D. first decreases and then increases
   E. unpredictable

6. The specific output per kg mass flow rate of a gas turbine (having fixed efficiencies of compressor and turine and fixed higher and lower temperature) with increase in pressure ratio will___________________?

   A. increase first at fast rate and then slow
   B. increase first at slow rate and then fast
   C. decrease continuously
   D. first increase, reach maximum and then decrease
   E. none of the above

7. 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

8. Separators in compressor installations are located_____________________?

   A. before intercooler
   B. after intercooler
   C. after receiver
   D. between after-cooler and air receiver
   E. before suction

9. 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

10. 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