When the wet steam is throttled but still remains wet at the exit of the throttle valve, then its temperature & dryness fraction respectively____________________?

Related Mcqs:

1. Dryness fraction of dry steam is_________________?

   A. 0
   B. ∞
   C. 1
   D. 0.5

2. Saturated steam at a pressure of 25 kg/cm2 is throttled to attain 5 kg/cm2. Then the outcoming steam will be_________________?

   A. Wet
   B. Saturated
   C. Superheated
   D. None of these

3. When dry bulb temperature & wet bulb temperature of moist air is the same, it means that the _________________?

   A. Partial pressure of water vapour is less than the total pressure
   B. Humidity is < 100% & dew point temperature of air has not reached
   C. Dew point temperature of air has not reached & air is not saturated fully
   D. Air is fully saturated

4. During sensible cooling of air, its wet bulb temperature ?

   A. Decreases but dew point remains constant
   B. Increases but dew point remains constant
   C. Increases & the dew point decreases
   D. Decreases & the dew point increases

5. If a solid is compressed adiabatically in its elastic range, its _____________ remains constant ?

   A. Internal energy
   B. Enthalpy
   C. Entropy
   D. Temperature

6. Dry saturated steam can be converted into super heated steam by____________________?

   A. Increasing its cross-sectional area of flow
   B. Passing it through a pressure reducing valve
   C. Forcing it downwards through a vertical tube
   D. None of these

7. Latent heat of dry steam at atmospheric pressure is 539 Kcal/kg; which _____________ with increase in the pressure of steam?

   A. Decreases
   B. Increases
   C. Remain same
   D. May increase or decrease

8. . The effect of friction on the flow of steam through a nozzle is to decrease the _______________ of steam?

   A. Wetness
   B. Mass flow rate
   C. Both A & B
   D. Neither A nor B

9. In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the________________?

   A. Range is 15°F
   B. Approach is 10°F
   C. Both A. & B.
   D. Neither A. nor B.

10. ______________________ temperature remains constant during adiabatic saturation process of unsaturated air ?

    A. Dew point
    B. Dry bulb
    C. Wet bulb
    D. None of these