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Mechanical Engineering
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Steam Boilers and Engines
Comments
Question
The amount of water evaporated in kg per kg of fuel burnt is called
Options
A. evaporative capacity of a boiler
B. equivalent evaporation from and at 100° C
C. boiler efficiency
D. none of these
Correct Answer
evaporative capacity of a boiler
Steam Boilers and Engines problems
Search Results
1. In forced circulation steam boilers, the force is applied
Options
A. to draw water
B. to circulate water
C. to drain off the water
D. all of these
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Correct Answer: to circulate water
2. Which of the following are boiler accessories?
Options
A. economiser
B. superheater
C. both (a) and (b)
D. none of these
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Correct Answer: both (a) and (b)
3. The length of Lancashire boiler varies from
Options
A. 5 to 6 m
B. 6 to 7 m
C. 7.25 to 9 m
D. 9 to 10 m
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Correct Answer: 7.25 to 9 m
4. A Cochran boiler is a horizontal multi-tubular boiler.
Options
A. Yes
B. No
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Correct Answer: No
5. The forced circulation of water does not take place in
Options
A. La-Mont boiler
B. Lancashire boiler
C. Velox boiler
D. Benson boiler
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Correct Answer: Lancashire boiler
6. By compounding the expansion of steam in two or more cylinders, the ratio of expansion
Options
A. does not change
B. increases
C. decreases
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Correct Answer: decreases
7. The average value of diagram factor lies between
Options
A. 0.2 to 0.5
B. 0.5 to 0.65
C. 0.65 to 0.9
D. 0.8 to 1.2
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Correct Answer: 0.65 to 0.9
8. Which of the following is a fire tube boiler?
Options
A. Lansashire boiler
B. Babcock and Wilcox boiler
C. Yarrow boiler
D. none of these
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Correct Answer: Lansashire boiler
9. Fire tube boilers are limited to a maximum working pressure of
Options
A. 0.17 MN/m
2
B. 1.7 MN/m
2
C. 17 MN/m
2
D. 170 MN/m
2
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Correct Answer: 1.7 MN/m
2
10. The diameter of superheated tubes in a locomotive boiler is
Options
A. 13 mm
B. 31 mm
C. 130 mm
D. 230 mm
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Correct Answer: 130 mm
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