A. 0
B. ∞
C. 1
D. 0.5
Related Mcqs:
- When the wet steam is throttled but still remains wet at the exit of the throttle valve, then its temperature & dryness fraction respectively____________________?
A. Decreases & increases
B. Increases & increases
C. Increases & decreases
D. Decreases & decreases - 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 - 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 - 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 - . 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 - Compressed dry air is used as the cutting fluid, while machining____________________?
A. Steel
B. Cast iron
C. Aluminium
D. None of these - Which of the following does not discharge the dust collected as a dry solid?
A. Electrostatic precipitator
B. Wet scrubber
C. Bag filter
D. Gravity settling chamber - Moist air is cooled along the line of constant ________________ , when it is passed over a cold & dry cooling coil, such that no condensation occurs ?
A. Enthalpy
B. Relative humidity
C. Wet bulb temperature
D. Dew point temperature - Percentage of argon (by volume) in dry atmospheric air is about________________?
A. 0.09
B. 0.3
C. 0.57
D. 0.94 - 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
