Related Mcqs:

1. 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

2. 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

3. With increase in annealing temperature, the following defect density decreases?

   A. Vacancy
   B. Dislocation
   C. Grain boundary
   D. All of these

4. 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

5. A gas which is collected over water becomes moistened due to water vapor, exerts its own partial pressure at the gas temperature, which is termed as its_______________?

   A. Aqueous tension
   B. Saturated humidity
   C. Vapor pressure
   D. Absolute humidity

6. Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by_________________?

   A. Conduction
   B. Convection
   C. Radiation
   D. Both A. & B.

7. If the head is doubled in & centrifugal pump, the power required will increase in the ratio of__________________?

   A. 23
   B. 23/2
   C. 25/2
   D. 21/3

8. __________________ of air does not increase with increase in temperature?

   A. Density
   B. Thermal diffusivity
   C. Viscosity
   D. Thermal conductivity

9. The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is ______________ BTU/hr?

   A. 100
   B. 200
   C. 1000
   D. 2000

10. A solid aluminium ball, when quenched in a water bath maintained at 40°C, cools down from 550°C to 450°C in 20 seconds. The expected temperature of the ball after next 20 seconds may be about ____________________ °C?

    A. 370
    B. 340
    C. 320
    D. 300