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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The maximum efficiency of a reaction turbine is

2 sin²α/(1 + sin²α)
(1 + cos²α)/2 cos²α
2 cos²α/(1 + cos²α)
(1 + sin²α)/2 sin²α

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Steam Boilers, Engines, Nozzles and Turbines
Fire tube boilers are

Internally fired
None of these
Internally as well as externally fired
Externally fired

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Steam Boilers, Engines, Nozzles and Turbines
During polytropic process

All of these
Steam may be wet, dry or superheated after expansion
Heat transfer takes place across cylinder walls
Work is done

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Steam Boilers, Engines, Nozzles and Turbines
In which of the following boilers, the draught in furnace is increased by utilising exhaust steam from engine

Babcock and Wilcox boiler
Locomotive boiler
Lancashire boiler
Benson boiler

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Steam Boilers, Engines, Nozzles and Turbines
The high pressure and low pressure cylinders in a Tandem type compound engine are regarded as having cranks

0° to each other
90° to each other
180° to each other
None of these

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Steam Boilers, Engines, Nozzles and Turbines
A compound steam engine in which piston rods of high pressure and low pressure cylinders are attached to two different cranks set at 90° to each other, is called

Woolf type compound engine
Receiver type compound engine
Tandem type compound engine
Both (A) and (B)

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