Steam Boilers - Interview Questions | Exam2Win

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126. Orsat meter is used for

A. gravimetric analysis of the flue gases

B. volumetric analysis of the flue gases

C. mass flow of the flue gases

D. measuring smoke density of flue gases

E. none of the above.

Explanation:

127. During polytropic process

A. heat transfer takes place across cylinder walls

B. work is done

C. steam may be wet, dry or superheated after expansion

D. all of the above

E. none of the above.

Explanation:

128. Pick up the wrong statement about critical condition of steam

A. latent heat is zero

B. liquid directly becomes steam

C. specific volume of steam and liquid is same

D. this is the maximum pressure limit

E. all properties of liquid and steam are same.

Explanation:

129. 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

E. dryness fraction alone.

Explanation:

130. 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 con-tainer

E. boiling has ^nothing to do with vapour pressure.

Explanation: