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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
When the total heat of steam is h kJ/kg and the sensible heat of feed water is hf1 kJ/kg, then the factor of evaporation is given by

(h - hf1)/2257
(h + hf1)/2257
(h × hf1)/2257
None of these

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Steam Boilers, Engines, Nozzles and Turbines
A compound steam engine in which the high pressure and low pressure cylinders have common piston rod, is called

Woolf type compound engine
Receiver type compound engine
None of these
Tandem type compound engine

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Steam Boilers, Engines, Nozzles and Turbines
Which is not correct statement about pulverized fuel firing?

Fuel burns economically
High burning rate is possible
Heat release can be easily controlled
It is the best technique for burning high ash content fuel having low fusion ash

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Steam Boilers, Engines, Nozzles and Turbines
The Locomotive boiler has

147 fire tubes and 34 superheated tubes
157 fire tubes and 24 superheated tubes
137 fire tubes and 44 superheated tubes
167 fire tubes and 14 superheated tubes

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Steam Boilers, Engines, Nozzles and Turbines
An economiser _________ the steam raising capacity of a boiler.

Increases
Decreases
None of these
Has no effect on

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Steam Boilers, Engines, Nozzles and Turbines
The expansion of steam in a nozzle follows

Joule cycle
Carnot cycle
Stirling cycle
Rankine cycle

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