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Machine Design

Machine Design
In a flange coupling, the bolts are subjected to

None of these
Tensile stress
Shear stress
Compressive stress

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Machine Design
In designing thick cylinders, the equation used is

All of these
Clavarinos' equation
Lame's equation
Birnie's equation

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Machine Design
The rated life of a bearing varies

Inversely as cube of load
Directly as load
Inversely as square of load
Inversely as fourth power of load

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Machine Design
The power transmitted by means of a belt depends upon

Arc of contact between the belt and the smaller pulley
Tension under which the belt is placed on the pulleys
Velocity of the belt
All of these

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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 = 2√t
d = 1.6√t
d = √t
d = 6√t

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Machine Design
Two helical springs of the same material and of equal circular cross-section, length and number of turns, but having radii 80 mm and 40 mm, kept concentrically (smaller radius spring within the larger radius spring), are compressed between two parallel planes with a load W. The inner spring will carry a load equal to

2W/3
W/2
W/9
8W/9

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