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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The length of shell of a Locomotive boiler is

4 m
2 m
1 m
3 m

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Steam Boilers, Engines, Nozzles and Turbines
The specific heat of superheated steam in kcal/kg is generally of the order of

0.3
0.8
0.5
0.1

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Steam Boilers, Engines, Nozzles and Turbines
In which of the following boilers, the draught in furnace is increased by utilising exhaust steam from engine

Benson boiler
Lancashire boiler
Locomotive boiler
Babcock and Wilcox boiler

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Steam Boilers, Engines, Nozzles and Turbines
The stage efficiency (ηS) is given by (where ηB = Blading efficiency, and ηN = Nozzle efficiency)

ηS = ηN / ηB
None of the listed here
ηS = ηB / ηN
ηS = ηB × ηN

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Steam Boilers, Engines, Nozzles and Turbines
The pressure at which latent heat of vaporisation of water is zero, is

Below atmospheric pressure
1 kg/cm²
225.6 kg/cm²
100 kg/cm²

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

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

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