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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
Latent heat of dry steam at atmospheric pressure is equal to

100 kcal/ kg
539 BTU/ lb
427 kcal/ kg
539 kcal/ kg

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Steam Boilers, Engines, Nozzles and Turbines
In locomotive boiler, maximum steam pressure is limited to

1 kg/cm²
5 kg/cm²
18 kg/cm²
10 kg/cm²

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Steam Boilers, Engines, Nozzles and Turbines
Vacuum for reciprocating steam engines compared to steam turbines is

Less
Equal
More
Could be more or less depending on the size of plant

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Steam Boilers, Engines, Nozzles and Turbines
A single stage impulse turbine with a diameter of 1.2 m runs at 3000 r.p.m. If the blade speed ratio is 0.42, then the inlet velocity of steam will be

188 m/s
79 m/s
900 m/s
450 m/s

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Steam Boilers, Engines, Nozzles and Turbines
The number of flue tubes in Lancashire boiler is

Four
Two
One
Zero

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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