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Machine Design

Machine Design
Which one of the following is a positive drive?

V-belt drive
Chain drive
Rope drive
Crossed flat belt drive

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Machine Design
The V-belts are particularly suitable for __________ drives.

Both A and B
Long
Short
None of these

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Machine Design
The buckling load will be maximum for a column, if

Both ends of the column are clamped
Both ends of the column are hinged
One end of the column is hinged and the other end is free
One end of the column is clamped and the other end is free

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Machine Design
According to Unwin's formula, the relation between the diameter of rivet hole (d) and the thickness of plate (t) is given by (where d and t are in mm)

d = 6√t
d = 2√t
d = √t
d = 1.6√t

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Machine Design
The suitable material for belt in agricultural machinery is

Leather
Balata gum
Rubber
Cotton duck

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

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