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Machine Design

Machine Design
The material commonly used for machine tool bodies is

Aluminium
Cast iron
Mild steel
Brass

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Machine Design
Multiple threads are used to secure

Low efficiency
High efficiency
High load lifting capacity
High mechanical advantage

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Machine Design
When the bearing is subjected to large fluctuations of load and heavy impacts, the bearing characteristic number should be _________ the bearing modulus.

20 times
5 times
15 times
10 times

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Machine Design
If p = bearing pressure on projected bearing area, z = absolute viscosity of lubricant, and N = speed of journal, then the bearing characteristic number is given by

p/ZN
Z/pN
ZN/p
N/Zp

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Machine Design
In unilateral system of tolerance, the tolerance is allowed on

One side of the nominal size
Both sides of the actual size
Both sides of the nominal size
One side of the actual size

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Machine Design
An Involute pinion and gear are in mesh. If both have the same size of addendum, then there will be interference between the

Tip of both gear and pinion
Flanks of both gear and pinion
Tip of the pinion and flank of gear
Tip of the gear and flank of pinion

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