The increase in pressure _________________?

A. Lowers the boiling point of a liquid
B. Raises the boiling point of a liquid
C. .does not affect the boiling point of a liquid
D. Reduces its volume

Hygrometery deals with the_________________?

A. Hygroscopic substances
B. Water vapour in air
C. Temperature of air
D. Pressure of air

Equivalent evaporation of water is the evaporation “for a feed water supply at 100°C__________________?

A. And its corresponding conversion into dry saturated steam at 100°c and 1.033 kg/cm2
B. And its corresponding conversion into dry steam at desired boiler pressure
C. Conversion into steam at atmospheric condition
D. Conversion into steam at the same pres-sure at which feed water is supplied

The state of vapour under saturation condition is described by_______________?

A. Pressure alone
B. Temperature alone
C. Pressure and temperature
D. Pressure and dryness fraction

Water boils when its vapour pressure ___________________?

A. Equals that of the surroundings
B. Equals 760 mm of mercury
C. Equals to atmospheric pressure
D. Equals the pressure of water in the container

Heating wet steam at constant temperature is heating it at constant_________________?

A. Volume
B. Pressure
C. Entropy
D. Enthalpy

At critical point, i.e. p=225.65 kg/cm2, the latent enthalpy of vaporisation is______________?

A. Maximum
B. Minimum
C. Zero
D. Depends on temperature also

In an experiment to determine dryness fraction of steam, the mass of water separated was 1.2 kg in 15 mts and the mass of steam passed out in same time was 4.8 kg. Dryness fraction is__________________?

A. 40%
B. 25%
C. 50%
D. 80%

Latent heat of dry steam at atmospneric pressure is equal to____________________?

A. 539 kcal/kg
B. 539 btu/lb
C. 427 kcal/kg
D. 100 kcal/kg

The dry saturated steam at very high pressure (150-200 kg/cm2) when throttled to atmosphere will become_______________?

A. Wet
B. Superheated
C. Remain dry saturated
D. Dry