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Machine Design

Machine Design
In order to permit the thermal expansion/contraction of tubing, it should be

Flared
Crimped
Bent
Honed

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Machine Design
The suitable material for belt in agricultural machinery is

Leather
Cotton duck
Balata gum
Rubber

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Machine Design
The permissible stress in the fillet weld is 100 N/mm². The fillet weld has equal leg lengths of 15 mm each. The allowable shearing load on the weldment per cm length of the weld is

7.5 kN
22.5 kN
10.6 kN
15 kN

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Machine Design
The objective of 'crowning' of the flat pulleys of belt drive is to

Prevent the belt joint from damaging the belt surface
Prevent the belt from running off the pulley
Increase the power transmission capacity
Increase the belt velocity

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Machine Design
In designing a flange coupling, the pitch circle diameter of bolts is taken as (where d = Diameter of the shaft)

3 d
5 d
2 d
4 d

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Machine Design
In a flange coupling, the keys are staggered at __________ along the circumference of the shafts in order to divide the weakening effect caused by key ways.

135°
160°
90°
180°

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