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

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Machine Design
In hydrostatic bearings

Grease is used for lubrication
Do not require external supply of lubricant
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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Machine Design
The ends of the leaves of a semi-elliptical leaf spring are made triangular in order to

Make M/I constant throughout the length of the leaf
Permit each leaf to act as an overhanging beam
Have variable bending moment (M) in each leaf
Obtain variable moment of inertia (I) in each leaf

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Machine Design
Which of the following statement is wrong for a connecting rod?

If Ixx > 4 Iyy, the buckling will occur about Y-axis
The most suitable section for the connecting rod is T-section
If Ixx < 4 Iyy, the buckling will occur about X-axis
The connecting rod will be equally strong in buckling about X-axis and Y-axis, if Ixx = 4 Iyy

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