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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Steam engine operates on

Carnot cycle
Joule cycle
Brayton cycle
Stirling cycle

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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

Economizer
Superheater
Injector
Air-preheater

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Steam Boilers, Engines, Nozzles and Turbines
The draught (in mm of water), for maximum discharge of flue gases through the chimney, is given by (where H = Height of the chimney in meters, and T1 = Absolute temperature of air outside the chimney in K)

T1 /176.5H
176.5H/T1
88.25H/T1
T1 /88.25H

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Steam Boilers, Engines, Nozzles and Turbines
The critical pressure ratio for initially wet steam is

0.577
0.601
0.546
0.582

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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

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

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Steam Boilers, Engines, Nozzles and Turbines
Thermal equilibrium means that the flow of steam is

Hyperbolic
Isentropic
Isothermal
Polytropic

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