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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
1 kg.m is equal to

102 Joules
9.81 Joules
None of these
427 Joules

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Steam Boilers, Engines, Nozzles and Turbines
The critical pressure ratio for gases is

0.577
0.546
0.582
0.528

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Steam Boilers, Engines, Nozzles and Turbines
The velocity of flue gases (V) through the chimney under a static draught of (H') metres is given by

V = 2g H'
V = 2g/H'
V = 2gH'
V = H'/2g

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following is a fire tube boiler?

Lancashire boiler
Babcock and Wilcox boiler
Yarrow boiler
None of these

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Steam Boilers, Engines, Nozzles and Turbines
For combustion of a fuel, following is essential

Proper ignition temperature
Correct fuel air ratio
All the three above
Oā‚‚ to support combustion

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Steam Boilers, Engines, Nozzles and Turbines
In a De-Laval nozzle expanding superheated steam from 10 bar to 0.1 bar, the pressure at the minimum cross-section (i. e. pressure at throat, pā‚‚) will be

3.3 bar
8.2 bar
5.46 bar
9.9 bar

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