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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
2 d
4 d
3 d

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Machine Design
The longitudinal joint in boilers is used to get the required

Efficiency of boiler
Length of boiler
Length and diameter of boiler
Diameter of boiler

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Machine Design
The acme threads are usually found on

Spindles of bench vices
Railway carriage couplings
Feed mechanism of machine tools
Screw cutting lathes

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Machine Design
The modulus of elasticity for mild steel is approximately equal to

110 kN/mm²
210 kN/mm²
80 kN/mm²
100 kN/mm²

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Machine Design
The coefficient of friction between the belt and pulley depends upon the

Speed of belt
All of these
Slip of belt
Material of belt and pulley

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Machine Design
For low and moderate speed engines, the cam follower should move with

Simple harmonic motion
Uniform acceleration and retardation
Cycloidal motion
Uniform velocity

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