Steam Boilers and Engines MCQs

The factor of evaporation for all boilers is always greater than unity.

The amount of water evaporated in kg per kg of fuel burnt is called equivalent evaporation from and at 100° C.

The ratio of heat actually used in producing the steam to the heat liberated in the furnace is called boiler efficiency.

none of the above

volume of intake steam

pressure of intake steam

temperature of intake steam

all of these

100 tonnes/h

135 tonnes/h

175 tonnes/h

250 tonnes/h

equal

half

double

four times

A fire tube boiler occupies less space than a water tube boiler, for a given power.

Steam at a high pressure and in large quantities can be produced with a simple vertical boiler.

A simple vertical boiler has one fire tube.

all of the above

steam jet

centrifugal fan

chimney

both (a) and (b)

[A]. Yes

[B]. No

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null

[A]. steam enters and exhausts through the same port

[B]. steam enters at one end and exhausts at the centre

[C]. steam enters at the centre and exhausts at the other end

[D]. none of the above

[A]. lever safety valve

[B]. dead weight safety valve

[C]. high steam and low water safety valve

[D]. all of these

[A]. internally fired boiler

[B]. externally fired boiler

[C]. natural circulation boiler

[D]. forced circulation boiler