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Machine Design

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

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

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Machine Design
Shear stress theory is applicable for

Elastic materials
All of these
Ductile materials
Brittle materials

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Machine Design
Three different weights fall from a certain height under vacuum. They will take

Times inversely proportional to weight to reach earth
None of these
Same time to reach earth
Times proportional to weight to reach earth

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

360°
120°
180°
270°

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Machine Design
When two helical springs of equal lengths are arranged to form a cluster spring, then

Load taken by each spring will be half the total load
Only A is correct
Shear stress in each spring will be equal
Both A and B is correct

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Machine Design
Which of the following statement is correct for gears?

All of these
The pitch circle diameter is equal to the product of module and number of teeth
The pitch circle is always greater than the base circle
The addendum is less than dedendum

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