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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The best suited coal for chain or traveling grate stoker boiler is

High sulphur coal
Non-coking or free burning coal
Pulverized coal
Coking coal

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of heat actually used in producing the steam to the heat liberated in the furnace, is known as

Power of a boiler
Factor of evaporation
Boiler efficiency
Equivalent evaporation

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

0.546
0.601
0.582
0.577

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Steam Boilers, Engines, Nozzles and Turbines
For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is _________ the piston speed of single acting steam engine.

Twice
Four times
Three times
Equal to

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following is steam dial?

Brown coal
Pulverized coal
Coking bituminous coal
Non-coking bituminous coal

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Steam Boilers, Engines, Nozzles and Turbines
When the speed of the crankshaft is between 100 r.p.m. and 250 r.p.m., the engine said to be a

Medium speed steam engine
Slow speed engine
High speed steam engine
None of the listed here

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