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Machine Design

Machine Design
The helix angle for double helical gears may be made up to

75°
45°
60°
90°

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Machine Design
The dedendum is the radial distance from the

Pitch circle to the top of a tooth
Addendum circle to the clearance circle
Top of a tooth to the bottom of a tooth
Pitch circle to the bottom of a tooth

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Machine Design
The smallest diameter of an external or internal screw thread is known as

Pitch diameter
Minor diameter
None of these
Major diameter

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Machine Design
The ratio of circumferential stress to longitudinal stress in a thin cylinder subjected to an internal pressure is

4
1
43832
2

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Machine Design
When an open coiled helical compression spring is subjected to an axial compressive load, the stress induced in the wire is

Compressive stress
Bending stress
Tensile stress
Shear stress

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Machine Design
The notch sensitivity q is expressed in terms of fatigue stress concentration factor Kf and theoretical stress concentration factor Kt as

(Kt - 1)/ (Kf - 1)
(Kf - 1)/ (Kt - 1)
(Kt + 1)/ (Kf + 1)
(Kf + 1)/ (Kt + 1)

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