Steam Boilers, Engines, Nozzles And Turbines MCQ Questions & Answers

Section 1 Section 2 Section 3 Section 4 Section 5

121.
In accelerated circulation type boiler

A. Heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum

B. Water is supplied in drum and through down comers located in atmospheric condition it passes to the water wall and rises to drum in the form of mixture of water and steam

C. Feed pump is employed to supplement natural circulation in water wall type furnace

D. Water is converted into steam in one pass without any recirculation

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122.
In forced circulation type boiler

A. Heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum

B. Water is supplied in drum and through down comers located in atmospheric condition it passes to the water wall and rises to drum in the form of mixture of water and steam

C. Feed pump is employed to supplement natural circulation in water wall type furnace

D. Water is converted into steam in one pass without any recirculation

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123.
The critical pressure ratio for initially dry saturated steam is

A. 0.546

B. 0.577

C. 0.582

D. 0.601

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124.
Heating of dry steam above saturation temperature is known as

A. Enthalpy

B. Superheating

C. Super saturation

D. Latent heat

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125.
The chimney draught varies with

A. Climatic conditions

B. Temperature of furnace gases

C. Height of chimney

D. All of these

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126.
De-Laval turbine is a

A. Simple impulse turbine

B. Simple reaction turbine

C. Impulse-reaction turbine

D. None of these

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127.
The efficiency of steam turbines may be improved by

A. Reheating of steam

B. Regenerative feed heating

C. Binary vapor plant

D. Any one of these

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128.
Incomplete combustion can be best judged by

A. Smoky chimney exit

B. Excess air in flue gases

C. Measuring carbon monoxide in flue gases

D. Measuring temperature of flue gases at exit of furnace

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129.
Green coal, in order to be burnt, must be

A. Heated sufficiently

B. Burnt in excess air

C. Heated to its ignition point

D. Burnt as powder

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130.
The ratio of the workdone on the blades to the energy supplied to the blades, is called

A. Blading efficiency

B. Nozzle efficiency

C. Gross or stage efficiency

D. Mechanical efficiency

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Steam Boilers, Engines, Nozzles And Turbines MCQ Questions & Answers | Mechanical Engineering

121. In accelerated circulation type boiler

Answer & Solution

122. In forced circulation type boiler

Answer & Solution

123. The critical pressure ratio for initially dry saturated steam is

Answer & Solution

124. Heating of dry steam above saturation temperature is known as

Answer & Solution

125. The chimney draught varies with

Answer & Solution

126. De-Laval turbine is a

Answer & Solution

127. The efficiency of steam turbines may be improved by

Answer & Solution

128. Incomplete combustion can be best judged by

Answer & Solution

129. Green coal, in order to be burnt, must be

Answer & Solution

130. The ratio of the workdone on the blades to the energy supplied to the blades, is called

Answer & Solution

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121.
In accelerated circulation type boiler

122.
In forced circulation type boiler

123.
The critical pressure ratio for initially dry saturated steam is

124.
Heating of dry steam above saturation temperature is known as

125.
The chimney draught varies with

126.
De-Laval turbine is a

127.
The efficiency of steam turbines may be improved by

128.
Incomplete combustion can be best judged by

129.
Green coal, in order to be burnt, must be

130.
The ratio of the workdone on the blades to the energy supplied to the blades, is called