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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The diameter of a cylindrical shell of a Scotch marine boiler varies from

2.5 to 3.5 m
None of these
3.5 to 4.5 m
1.5 to 2 m

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Steam Boilers, Engines, Nozzles and Turbines
Heating wet steam at constant temperature is heating it at constant

Entropy
Enthalpy
Volume
Pressure

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Steam Boilers, Engines, Nozzles and Turbines
A valve installed between the boiler and the feed pump is

Steam stop valve
Blow off cock
Feed check valve
None of these

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Steam Boilers, Engines, Nozzles and Turbines
Green coal, in order to be burnt, must be

Heated sufficiently
Burnt as powder
Burnt in excess air
Heated to its ignition point

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following is correct? (Where pa = Actual mean effective pressure, pm = Theoretical mean effective pressure, and K = Diagram factor)

pa = pm + K
pa = pm × K
pa = pm/K
pa = K/pm

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Steam Boilers, Engines, Nozzles and Turbines
Mechanical equivalent of heat for 1 kcal or Joule's equivalent is equal to

102 kg.m
421 kg.m
539 kg.m
421 kg.m

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