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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
In locomotives, the draught is produced by

Both combined (A) and (B)
Steam jet draught
Induced draft fan
Chimney

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Steam Boilers, Engines, Nozzles and Turbines
In case of non-condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is _________ the condenser pressure.

None of these
Equal to
Higher than
Lower than

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Steam Boilers, Engines, Nozzles and Turbines
When the cross-section of a nozzle increases continuously from entrance to exit, it is called a

None of these
Convergent nozzle
Divergent nozzle
Convergent-divergent nozzle

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Steam Boilers, Engines, Nozzles and Turbines
The friction present between the steam and the nozzle surfaces reduces the heat drop by

15 to 25%
40 to 60%
25 to 40%
10 to 15%

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of heat utilized to produce steam and the heat liberated in furnace is known as

Boiler efficiency
Boiler evaporative capacity
Factor of evaporation
Boiler effectiveness

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Steam Boilers, Engines, Nozzles and Turbines
The relative heat absorption for successively added equal areas of boiler convection heating surfaces

First increases and then decreases
Remain unaffected
Increases
Decreases

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