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Machine Design

Machine Design
The efficiency of a riveted joint is equal to

Least of Pt, Ps and Pc/P
Pc /P
Ps /P
Pt /P

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Machine Design
According to Indian standards, total numbers of fundamental deviations are

25
10
15
20

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Machine Design
When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor, and W = Axial compressive load on the spring)

(2WD/ πd3) × K
(8WD/ πd3) × K
(WD/ πd3) × K
(4WD/ πd3) × K

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Machine Design
Which of the following cotter joint will be used to connect strap end of a connecting rod?

Sleeve and cotter joint
Gib and cotter joint
Any one of these
Spigot and socket cotter joint

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Machine Design
A self locking screw has

Hole for inserting split pin
Course threads
Fine threads
Coefficient of friction is greater than tangent of load angle

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Machine Design
In a steam engine, the valve rod is connected to an eccentric rod by means of

Flange coupling
Cotter joint
Universal joint
Knuckle joint

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