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Machine Design

Machine Design
In designing a flange coupling, the pitch circle diameter of bolts is taken as (where d = Diameter of the shaft)

5 d
4 d
3 d
2 d

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Machine Design
The wire ropes make contact at

Sides and bottom of groove of the pulley
Anywhere in the groove of the pulley
Sides of groove of the pulley
Bottom of groove of the pulley

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Machine Design
The suitable material for belt in agricultural machinery is

Cotton duck
Balata gum
Leather
Rubber

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Machine Design
In designing thick cylinders, the equation used is

Lame's equation
Clavarinos' equation
Birnie's equation
All of these

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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)

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

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Machine Design
A coupling used to connect two perfectly aligned shafts, is

Muff coupling
Compression coupling
Flange coupling
All of these

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