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Machine Design

Machine Design
A rivet is specified by

Type of head
Length of rivet
Shank diameter
Length of tail

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Machine Design
The shearing stresses in the inner face as compared to outer face of the wire in a heavy close coiled spring is

Equal
Larger
Smaller
Larger/smaller depending on diameter of spring coil

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Machine Design
The longitudinal stress is __________ of the circumferential stress.

Two-third
Double
Three-fourth
One-half

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Machine Design
The standard length of the shaft is

5 m
All of these
7 m
6 m

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Machine Design
The material commonly used for machine tool bodies is

Mild steel
Cast iron
Brass
Aluminium

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Machine Design
A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is τ. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be

τ
τ/2
4 τ
2 τ

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