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

Related Mcqs:

1. The critical pressure at which the latent heat of vaporization of steam becomes zero is _____________ Kg/cm2 ?

   A. 273.15
   B. 225.65
   C. 100.03
   D. 373.15

2. 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

3. For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm3) while the C.V. is same on weight basis (i.e., kcal/kg) ?

   A. Propane and acetylene
   B. Propane and LPG
   C. Sewage gas and gobar gas
   D. B.F gas and coke oven gas

4. 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

5. Percentage of argon (by volume) in dry atmospheric air is about________________?

   A. 0.09
   B. 0.3
   C. 0.57
   D. 0.94

6. With increase in steam pressure, its specific volume decreases ____________________?

   A. Rapidly first and then slowly
   B. Linearly
   C. Slowly first and then rapidly
   D. Exponentially

7. A high pressure boiler generates steam at a pressure greater than _____________________ kg/cm2 ?

   A. 10
   B. 30
   C. 50
   D. 80

8. The delivery pressure of boiler feed water pump compared to the boiler steam pressure is___________________?

   A. Same
   B. Slightly less
   C. Slightly more
   D. Much more

9. Dryness fraction of dry steam is_________________?

   A. 0
   B. ∞
   C. 1
   D. 0.5

10. . 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