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Machine Design

Machine Design
Euler’s formula for a mild steel column is not valid if the slenderness ratio is

120
100
60
90

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Machine Design
The bearings of heavy series have capacity __________ over the medium series.

20 to 30%
30 to 40%
10 to 20%
40 to 50%

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Machine Design
Shaft coupling is used in machinery to

All of these
Introduce mechanical flexibility
Reduce the transmission of shock loads
Introduce protection against over loads

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Machine Design
A circular shaft can transmit a torque of 5 kN-m. If the torque is reduced to 4 kN-m, then the maximum value of bending moment that can be applied to the shaft is

3 kN-m
4 kN-m
2 kN-m
1 kN-m

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

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

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Machine Design
Cast iron pipes are mainly used

All of these
For conveying steam
In pressure lubrication systems on prime movers
In water and sewage systems

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