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Machine Design

Machine Design
The allowable static stress for steel gears is approximately __________ of the ultimate tensile stress.

One-third
One-fourth
Double
One-half

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Machine Design
The arms of the pulleys for flat belt drive have

Elliptical cross-section
Major axis twice the minor axis
Major axis in plane of rotation
All the three characteristics

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Machine Design
A hollow shaft will transmit a __________ torque than a solid shaft of the same mass and same material.

Medium
Greater
None of these
Smaller

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Machine Design
When bevel gears having equal teeth and equal pitch angles connect two shafts whose axes intersect at right angle, then they are known as

Crown bevel gears
Miter gears
Internal bevel gears
Angular bevel gears

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Machine Design
The included angle in unified of American National threads is

55°
29°
60°
47°

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Machine Design
The ratio of the ultimate stress to the design stress is known as

Bulk modulus
Strain
Elastic limit
Factor of safety

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