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Machine Design

Machine Design
Rankine's theory is used for

Plastic materials
Elastic materials
Brittle materials
Ductile materials

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Machine Design
When a shaft is subjected to combined twisting moment (T) and bending moment (M), then the equivalent twisting moment is equal to

(1/2) × √(M² + T²)
(1/2) × [M + √(M² + T²)]
M + √(M² + T²)
√(M² + T²)

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Machine Design
The standard length of the shaft is

7 m
All of these
6 m
5 m

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Machine Design
The helix angle for single helical gears ranges from

35° to 50°
10° to 15°
20° to 35°
15° to 20°

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Machine Design
The shock absorbing capacity of a bolt may be increased by

Tightening the bolt properly
Increasing its shank diameter
Making the shank diameter equal to core diameter of thread
Decreasing its shank diameter

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Machine Design
When bevel gears connect two shafts whose axes intersect at an angle greater than a right angle and one of the bevel gears has a pitch angle of 90°, then they are known as

Crown bevel gears
Mitre gears
Angular bevel gears
Internal bevel gears

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