Engineering :: Machine Design
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| 331. |
Which of the following types of gears are free from interference? |
| A. |
Cycloidal |
B. |
Hypocycloidal |
| C. |
Epicycloidal |
D. |
Involute |
| E. |
Stub |
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Answer: Option A
Explanation:
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| 332. |
For which of the following gear material the noise level is relatively low? |
| A. |
Alloy steels |
B. |
Grade cast iron |
| C. |
Porous materials |
D. |
Non-ferrous materials |
| E. |
Non-matallic material |
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Answer: Option E
Explanation:
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| 333. |
Lewis equation in ears is used to evaluate |
| A. |
Tensile stress in bending |
B. |
Compressive stress in bending |
| C. |
Endurance limit |
D. |
Creep stress |
| E. |
Shear stress on flank |
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Answer: Option B
Explanation:
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| 334. |
Low pressure angle on gears is likely to result in |
| A. |
Weaker teeth |
B. |
Stronger teeth |
| C. |
Pitting |
D. |
Abrasion |
| E. |
Wear |
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Answer: Option A
Explanation:
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| 335. |
Automobile gears are generally made of |
| A. |
carbon chrome manganese steel |
B. |
Phosphor bronze |
| C. |
Grade 30 cast iron |
D. |
Malleable cast iron |
| E. |
Any of the above |
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Answer: Option A
Explanation:
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| 336. |
Abrasion wear of gear tooth occurs due to |
| A. |
Poor lubrication |
B. |
Fatigue |
| C. |
Presence of foreign particles |
D. |
Excessive load |
| E. |
Any of the above |
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Answer: Option C
Explanation:
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| 337. |
Gears preferred for minimum axial thrust are |
| A. |
Helical gears |
B. |
Worm gears |
| C. |
Hypoid gears |
D. |
Herring bone gears |
| E. |
Any of the above |
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Answer: Option D
Explanation:
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| 338. |
Spigot and socket joints are used on pipes |
| A. |
Carrying air at pressure below atmospheric pressure |
B. |
Carrying air at pressure above atmospheric pressure |
| C. |
Carrying high pressure fluids under high pressure |
D. |
Carrying steam under high pressure |
| E. |
Which are buried underground |
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Answer: Option E
Explanation:
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| 339. |
Expansion joints are provided on pipes carrying |
| A. |
Air at pressures below atmospheric pressure |
B. |
Air at high pressures |
| C. |
Water |
D. |
Viscous fluids |
| E. |
Steam |
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Answer: Option E
Explanation:
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| 340. |
Regenerative braking is used on |
| A. |
Heavy duty trucks |
B. |
Earth moving machines |
| C. |
Steam locomotives |
D. |
Diesel locomotives |
| E. |
Electric locomotives |
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Answer: Option E
Explanation:
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