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Machine Design

Machine Design
When a close coiled helical spring is compressed, its wire is subjected to

Shear
Compression
All of these
Tension

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Machine Design
The cam follower extensively used in aircraft engines is

Knife edge follower
Spherical faced follower
Flat faced follower
Roller follower

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Machine Design
A type of brake commonly used in motor cars is a

Shoe brake
Internal expanding brake
Band and block brake
Band brake

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Machine Design
A spring of stiffness 1000 N/m is stretched initially by 100 mm from the undeformed position. The work required to stretch it by another 100 mm is

10 N-m
5 N-m
7 N-m
15 N-m

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Machine Design
According to maximum normal stress theory, the maximum normal stress in the shaft is

√(σ² × 4τ²)
σ + √(σ² × 4τ²)
(1/2) × [σ + √(σ² × 4τ²)]
(1/2) × √(σ² × 4τ²)

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Machine Design
Taper on the cotter and slot is provided

On both the sides
On one side only
May be provided anywhere
On none of the sides

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