Machine Design
Which of the following statement is correct, for two shafts connected in parallel?

Torsional stiffness of each shaft is the same
Shear stress in each shaft is the same
Angle of twist of each shaft is the same
Torque in each shaft is the same

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Machine Design
Pitch point of a cam is

A point on the pitch curve having maximum pressure angle
Any point on the pitch curve
A point on the pitch curve having minimum pressure angle
Any point on the pitch circle

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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 four rivets per pitch length, all in double shear
There are five 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
Jam nut is a locking device in which

One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter spitted and bent in reverse direction at other end
A slot is cut partly in middle of nut and then slot reduced by tightening a screw
A hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip

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Machine Design
When the belt is transmitting maximum power,

The tension in tight side is thrice the centrifugal tension
None of these
The tension in slack side is equal to the centrifugal tension
The tension in tight side is twice the centrifugal tension

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