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Machine Design

Machine Design
Oil in journal bearing should be applied at the point where load is

Maximum
Average
Nil or lightest
Any one of the above

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Machine Design
A key way lowers

Both the strength and rigidity of the shaft
The ductility of the shaft
The rigidity of the shaft
The strength of the shaft

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Machine Design
When a shaft is subjected to combined twisting moment (T) and bending moment (M), then the equivalent twisting moment is equal to

(1/2) × √(M² + T²)
√(M² + T²)
(1/2) × [M + √(M² + T²)]
M + √(M² + T²)

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Machine Design
Which one of the following loading is considered for the design of axles?

Twisting moment only
Combined action of bending moment, twisting moment and axial thrust
Combined bending moment and twisting moments
Bending moment only

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Machine Design
Gear box is used

To increase efficiency of system
For speed reduction
To produce torque
To obtain variable speeds

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Machine Design
For longitudinal joint in boilers, the type of joint used is

Any one of the above
Butt joint with double cover plate
Butt joint with single cover plate
Lap joint with one ring overlapping the other

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