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Machine Design

Machine Design
A bench vice has following type of threads

Square
Metric
Acme
Buttress

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

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

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Machine Design
For standard coarse threads of nut, the threads will be as strong in failure by shear as the bolt in tension, if the height of nut (h) is approximately

0.7 times
0.6 times
0.4 times
0.8 times

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Machine Design
The helix angle for single helical gears ranges from

20° to 35°
15° to 20°
35° to 50°
10° to 15°

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Machine Design
A riveted joint is a __________ fastening.

Temporary
None of these
Permanent
Either A or B

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Machine Design
Deep groove ball bearings are used for

Combined thrust and radial loads at high speed
Small angular displacement of shafts
Radial load at high speed
Heavy thrust load only

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