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Strength of Materials
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Question
The distance between the centres of rivets in adjacent rows of zig-zag riveted joint, is called back pitch.
Options
A. True
B. False
Correct Answer
False
More questions
1. A uniform body 3 m long, 2 m wide and 1 m deep floats in water. If the depth of immersion is 0.6 m, then the weight of the body is
Options
A. 3.53 kN
B. 33.3 kN
C. 35.3 kN
D. none of these
Show Answer
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Correct Answer: 35.3 kN
2. In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta.
Options
A. less than
B. more than
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Correct Answer: less than
3. The heat flows from a cold body to a hot body with the aid of an external source. This statement is given by
Options
A. Kelvin
B. Joule
C. Clausis
D. Gay-Lussac
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Correct Answer: Clausis
4. The efficiency of roots blower __________ with the increase in pressure ratio.
Options
A. decreases
B. increases
C. does not change
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Correct Answer: decreases
5. Time study is carried out to determine the time required to complete job by
Options
A. a slow worker
B. a fast worker
C. an average worker
D. an apprentice
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Correct Answer: an average worker
6. The knocking tendency in spark ignition engines may be decreased by
Options
A. controlling the air-fuel mixture
B. controlling the ignition timing
C. controlling the exhaust temperature
D. reducing the compression ratio
Show Answer
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Correct Answer: reducing the compression ratio
7. Volumetric efficiency of a compressor decreases with __________ in compression ratio.
Options
A. decrease
B. increase
Show Answer
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Correct Answer: increase
8. The negative rake is usually provided on
Options
A. high carbon steel tools
B. high speed steel tools
C. cemented carbide tools
D. all of these
Show Answer
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Correct Answer: cemented carbide tools
9. When the gas is heated at constant pressure, the heat supplied
Options
A. increases the internal energy of the gas
B. increases the temperature of the gas
C. does some external work during expansion
D. Both (B) and (C)
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Correct Answer: Both (B) and (C)
10. In a centrifugal compressor, the flow of air is __________ to the axis of compressor.
Options
A. parallel
B. perpendicular
C. inclined
D. none of these
Show Answer
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Correct Answer: perpendicular
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