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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Hard coke is used in

Thermal power plant
Domestic use
Blast furnace
Cement industry

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Steam Boilers, Engines, Nozzles and Turbines
The draught produced by a steam jet issuing from a nozzle placed in the ash-pit under the fire grate of the furnace is called

Forced steam jet draught
Chimney draught
None of these
Induced steam jet draught

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Steam Boilers, Engines, Nozzles and Turbines
It is required to produce large amount of steam at low pressure. Which boiler should be used?

Pulverized fuel fired boiler
Lancashire boiler
Babcock and Wilcox boiler
Cochran boiler

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

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

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the useful heat drop to the isentropic heat drop is called

Condenser efficiency
Boiler efficiency
Nozzle efficiency
Vacuum efficiency

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Steam Boilers, Engines, Nozzles and Turbines
Size of boiler tubes is specified by

Inside diameter and thickness
Outside diameter and inside diameter
Mean diameter and thickness
Outside diameter and thickness

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