Machine Design
The ratio of driving tensions in V-belt drives is __________ flat belt drives.

sin α times less than
sin α times more than
cosec α times more than
Equal to

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Machine Design
A triple riveted butt joint with double straps of unequal width is to be designed for a boiler shell. The pitch of the rivets in the outer row is double the pitch in the inner row and zigzag riveting is proposed. Which of the following statement is correct?

There are five rivets per pitch length, all in double shear
There are four rivets per pitch length, all in double shear
There are five rivets per pitch length, out of which four are in double shear and one is in single shear
There are four rivets per pitch length, out of which two are in single shear and two are in double shear

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Machine Design
The face of the tooth is the

Surface of the tooth above the pitch surface
Surface of the top of the tooth
Surface of the tooth below the pitch surface
Width of the tooth measured along the pitch circle

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