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Machine Design

Machine Design
Which is positive drive?

V belt drive
Timing belt
Flat belt drive
Crossed belt drive

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Machine Design
In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by

Decreasing the cross-section area of bar
Increasing the cross-section area of bar
Would depend upon other factors
Remain unaffected with cross-section area

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Machine Design
The usual clearance provided in hydrodynamic bearing per mm of diameter of shaft is

0.01 micron
0.1 micron
1 micron
10 microns

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Machine Design
A flanged pipe joint will be a leak-proof joint, if the circumferential pitch of the bolts is (where d = Diameter of bolt hole)

Equal to inside diameter of pipe
Greater than 30d
Between 20d and 30d
Less than 20d

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Machine Design
The suitable material for belt used in flour mill is

Rubber
Canvas or cotton duck
Leather
Balata gum

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Machine Design
Resilience of a material is important, when it is subjected to

Fatigue
Thermal stresses
Combined loading
Shock loading

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