Mechanical Engineering MCQs

A. C02
B. Co
C. 02
D. N2

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

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

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

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

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

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

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

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

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