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Machine Design

Machine Design
The suitable material for belt in agricultural machinery is

Rubber
Balata gum
Cotton duck
Leather

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Machine Design
Which of the following statement is correct, for two shafts connected in parallel?

Torque in each shaft is the same
Shear stress in each shaft is the same
Angle of twist of each shaft is the same
Torsional stiffness of each shaft is the same

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Machine Design
The shearing stresses in the inner face as compared to outer face of the wire in a heavy close coiled spring is

Smaller
Larger/smaller depending on diameter of spring coil
Larger
Equal

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Machine Design
An Involute pinion and gear are in mesh. If both have the same size of addendum, then there will be interference between the

Tip of both gear and pinion
Flanks of both gear and pinion
Tip of the pinion and flank of gear
Tip of the gear and flank of pinion

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Machine Design
The power transmitted by the belt drive can be increased by

Dressing the belt to increase the coefficient of friction
Increasing the initial tension in the belt
Increasing wrap angle by using idler pulley
All of these

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Machine Design
The modulus of elasticity for mild steel is approximately equal to

110 kN/mm²
210 kN/mm²
100 kN/mm²
80 kN/mm²

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