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Machine Design

Machine Design
The following type of nut is used with alien bolt

Hexagonal nut
Castle nut
Any one of the above
Slotted nut

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Machine Design
In standard taper roller bearings, the angle of taper of outer raceway is

5°
15°
8°
25°

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Machine Design
Rankine Gordon formula for buckling is valid for

Long column
Short and long column
Very long column
Short column

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Machine Design
Screws used for power transmission should have

High efficiency
Low efficiency
Very fine threads
Strong teeth

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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

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

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Machine Design
In a belt drive, if the pulley diameter is doubled keeping the tension and belt width constant, then it will be necessary to

Increase the key length
Decrease the key length
Increase the key depth
Increase the key width

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