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Machine Design

Machine Design
The efficiency of a riveted joint is equal to

Least of Pt, Ps and Pc/P
Pc /P
Pt /P
Ps /P

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Machine Design
Buttress threads are usually found on

Spindles of bench vices
Feed mechanisms
Railway carriage couplings
Screw cutting lathes

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Machine Design
Allen bolts are

Used in aircraft application
Self locking bolts
Provided with hexagonal depression in head
Designed for shock load

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Machine Design
According to I.B.R., shearing resistance required to shear off the rivet per pitch length (in double shear) is (where n = Number of rivets per pitch length)

3 × (π/4) d² × τ × n
1.875 × (π/4) d² × τ × n
2 × (π/4) d² × τ × n
(π/4) d² × τ × n

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Machine Design
In leaf springs, the longest leaf is known as

None of these
Lower leaf
Master leaf
Upper leaf

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Machine Design
A leaf spring in automobiles is used

To apply forces
To store strain energy
To absorb shocks
To measure forces

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