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Machine Design

Machine Design
A bench vice has following type of threads

Acme
Metric
Square
Buttress

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Machine Design
An elastic bar is fixed at the upper end and loaded at the lower end by a falling weight. The shock load produced can be reduced by

All of these
Decreasing the modulus of elasticity of the bar
Decreasing the cross-sectional area of the bar
Increasing the length of bar

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Machine Design
The rolling contact bearings are known as

Thick lubricated bearings
Thin lubricated bearings
Antifriction bearings
Plastic bearings

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Machine Design
If a bearing is designated by the number 305, it means that the bearing is of

Light series whose bore is 5 mm
Medium series whose bore is 25 mm
Light series whose bore is 25 mm
Medium series whose bore is 5 mm

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Machine Design
For tight leakage joints, following type of thread is best suited

Buttress
NPT (national pipe threads).
Square
Metric

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Machine Design
Which of the following is an anti-friction bearing?

Pedestal bearing
Collar bearing
Journal bearing
Needle bearing

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