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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
An economiser in a boiler

Increases steam flow
Decreases fuel consumption
Decreases steam pressure
Increases steam pressure

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Steam Boilers, Engines, Nozzles and Turbines
100% efficiency of a thermal cycle cannot be achieved because of

It is not possible to achieve 0°K temperature
Leakage
Frictional losses
Non availability of ideal substance

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Steam Boilers, Engines, Nozzles and Turbines
The bituminous coal is no caking if its carbon content is

81-85%
90-95%
78-81%
85-90%

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Steam Boilers, Engines, Nozzles and Turbines
A device in which some portion of waste heat of flue gases is recovered to heat the air before it passes to the furnace for combustion purpose, is known as

Injector
Air-preheater
Superheater
Economizer

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Steam Boilers, Engines, Nozzles and Turbines
The device attached to the steam chest for preventing explosions due to excessive internal pressure of steam is called

Safety valve
Water level indicator
Pressure gauge
Fusible plug

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Steam Boilers, Engines, Nozzles and Turbines
An air preheater is installed

Before the superheater
None of these
Between the economiser and chimney
Before the economiser

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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