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Machine Design

Machine Design
Which one of the following is a positive drive?

Rope drive
Crossed flat belt drive
V-belt drive
Chain drive

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Machine Design
In a full journal bearing, the angle of contact of the bearing with the journal is

360°
180°
270°
120°

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Machine Design
Creep in belt is due to

Material of the belt
Material of the pulley
Uneven extensions and contractions due to varying tension
All of these

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Machine Design
The expansion joint is mostly used for pipes which carry steam at __________ pressures.

Medium
None of these
High
Low

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Machine Design
If P1 and P2 are the tight and slack side tensions in the belt, then the initial tension Pi (according to Barth) will be equal to (Where, Pc is centrifugal tension)

⅟₂× (P1 + P2)
[(√P1 + √P2)/2]²
P1 + P2
[⅟₂ × (P1 + P2)] + Pc

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Machine Design
The included angle for the V-belt is usually

30°-40°
10°-20°
40°-60°
60°-80°

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