Machine Design
The difference between the tooth space and the tooth thickness as measured on the pitch circle, is called

Backlash
Clearance
Working depth
Face width

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Machine Design
For unequal width of butt straps, the thicknesses of butt straps are

0.75 t for wide strap on the inside and 0.625 t for narrow strap on the outside
0.75 t for narrow strap on the inside and 0.625 t for wide strap on the outside
0.75 t for both the straps on the inside and outside
0.625 t for both the straps on the inside and outside

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Machine Design
Which of the following statement is correct regarding power screws?

The efficiency of a self locking screw can not be more than 50%
If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50%
Both (A) and (B)
The efficiency of Acme (trapezoidal) thread is less than that of a square thread

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Machine Design
In hydrostatic bearings

Do not require external supply of lubricant
Grease is used for lubrication
The oil film is maintained by supplying oil under pressure
The Oil film pressure is generated only by the rotation of the journal

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