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Machine Design

Machine Design
When a material is subjected to fatigue loading, the ratio of the endurance limit to the ultimate tensile strength is

0.65
0.2
0.35
0.5

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Machine Design
The piston rod of a steam engine is usually connected to the cross-head by means of

Bolted joint
Cotter joint
Knuckle joint
Universal joint

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Machine Design
According to Indian standards, a bolt thread of 6 mm size of coarse pitch and with allowance on the threads and normal tolerance grade is designated as

M6 - 8d
M8 - 6d
M8
M6

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Machine Design
Rivets are generally specified by

Nominal diameter
Thickness of plates to be riveted
Diameter of head
Length of rivet

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Machine Design
The cross-section of the arm of a bell crank lever is

Rectangular
Any one of these
I-section
Elliptical

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Machine Design
A pressure vessel is said to be a thick shell, if the ratio of wall thickness to its diameter is

Equal to 1/10
Less than 1/10
Greater than 1/10
None of these

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