Engineering :: Machine Design
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541. |
Treads in tyres are provided to |
A. |
increase tyre grip on the road |
B. |
prevent skidding on dusty roads |
C. |
prevent skidding on wet roads |
D. |
none of the above |
Answer: Option B
Explanation:
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542. |
The most common material for the balls and races of ball bearings is |
A. |
High carbon steel |
B. |
High speed steel |
C. |
high chromium steel |
D. |
none of the above |
Answer: Option C
Explanation:
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543. |
The holding power of sunk key is due to the resistance it differs in |
A. |
shear only |
B. |
crushing only |
C. |
tension only |
D. |
shear and crushing |
Answer: Option D
Explanation:
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544. |
Splined shafts are most commonly used in |
A. |
aircrafts |
B. |
machine tools |
C. |
automobiles |
D. |
none of the above |
Answer: Option C
Explanation:
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545. |
A shaft coupling should |
A. |
hold the two shafts in perfect alignment |
B. |
transmit full power of the shaft |
C. |
have no projecting parts |
D. |
have all the above characteristics |
Answer: Option D
Explanation:
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546. |
A coupling used to connect two perfectly aligned shafts is |
A. |
bush pin coupling |
B. |
Oldham coupling |
C. |
rigid tlange coupling |
D. |
none of the above |
Answer: Option C
Explanation:
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547. |
In door shutters, the type of the spring used is |
A. |
close coiled helical spring |
B. |
spiral spring |
C. |
conical helical spring |
D. |
helical torsion spring |
Answer: Option D
Explanation:
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548. |
In watches and gramophones, which spring is most commonly used |
A. |
Flat spiral spring |
B. |
torsion helical spring |
C. |
conical helical spring |
D. |
none of the above |
Answer: Option A
Explanation:
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549. |
The material of a flt spiral spring is in a state of |
A. |
pure torsion |
B. |
pure bending |
C. |
torsion and bending |
D. |
none of the above |
Answer: Option B
Explanation:
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550. |
When a nut is tightened by placing a washer under it, the bolt tends to fall in |
A. |
compression |
B. |
tension |
C. |
shear |
D. |
none of the above |
Answer: Option B
Explanation:
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