Engineering :: Machine Design
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51. |
Power capacitors are used |
A. |
To improve electrical capacity |
B. |
To improve efficiency |
C. |
To reduce power factor |
D. |
To improve power factor |
E. |
None of the above |
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Answer: Option D
Explanation:
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52. |
The loading on a pinion gear is usually |
A. |
Compression |
B. |
Tension |
C. |
Shear |
D. |
Cyclic loading |
E. |
None of the above |
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Answer: Option D
Explanation:
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53. |
ERW pipes are |
A. |
Elastic reinforced wire |
B. |
Extra reinforcement welded |
C. |
Electrically resistance welded |
D. |
Electrically reinforced and welded |
E. |
None of the above |
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Answer: Option C
Explanation:
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54. |
Induction hardening of components in done |
A. |
To increase hardness at the centre |
B. |
To increase the hardness of the core |
C. |
To increase hardness uniformly |
D. |
To increase hardness on the surface only |
E. |
To increase hardness at a spot only |
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Answer: Option D
Explanation:
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55. |
Muntz metal contains |
A. |
Copper-nickel |
B. |
Copper-zinc |
C. |
Copper-tin |
D. |
Copper-aluminium |
E. |
Copper-chromium |
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Answer: Option B
Explanation:
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56. |
Bush bearings |
A. |
Phosphor bronze |
B. |
Aluminium bronze |
C. |
Mild steel |
D. |
White metal alloys |
E. |
None of the above |
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Answer: Option D
Explanation:
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57. |
A Babbitt is |
A. |
A eutcctic of iron and iron phosphide |
B. |
A gadget for measuring volume |
C. |
A measure of magnetic induction produced in a material |
D. |
Antimony bearing lead or tia alloy |
E. |
None of the above |
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Answer: Option D
Explanation:
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58. |
Steel balls for ball bearings are manufactured by |
A. |
Turning |
B. |
Casting |
C. |
Rolling |
D. |
Cold heading |
E. |
Pressing |
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Answer: Option D
Explanation:
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59. |
Safety valve used on locomotive boilers is generally of |
A. |
Dead weight type |
B. |
Indirect dead weight type |
C. |
Spring balanced type |
D. |
Lever load type |
E. |
Spring type |
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Answer: Option E
Explanation:
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60. |
Dead weight type safety valve is not used on locomotives because |
A. |
It is bulky |
B. |
It gives bad apparatus |
C. |
It is not reliable |
D. |
It is costly |
E. |
It is susceptible to vibratory forces |
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Answer: Option E
Explanation:
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