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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The rate of discharge through the nozzle ___ when the exit pressure is gradually reduced.

None of the listed here
Decreases
Remains same
Increases

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

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

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Steam Boilers, Engines, Nozzles and Turbines
Efficiency of a thermal cycle increases by

Cooling of steam
Reheating of steam
Regeneration
Both (A) and (B)

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the volume at cut-off to the swept volume is called

Cut-off ratio
None of these
Clearance ratio
Expansion ratio

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Steam Boilers, Engines, Nozzles and Turbines
Pulverized fuel is used for

More calorific value
Less radiation loss
Better burning
Medium sized units

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Steam Boilers, Engines, Nozzles and Turbines
The function of a cross-head is to guide motion of the _________ and to prevent it from bending.

Eccentric rod
Piston rod
Connecting rod
Valve rod

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