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Machine Design

Machine Design
Belt slip may occur due to

Driving pulley too small
Heavy load
Loose belt
All of these

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Machine Design
Stress concentration in static loading is more serious in

Equally serious in both cases
Ductile materials
Brittle materials
Depends on other factors

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Machine Design
A flanged pipe joint will be a leak-proof joint, if the circumferential pitch of the bolts is (where d = Diameter of bolt hole)

Less than 20d
Greater than 30d
Between 20d and 30d
Equal to inside diameter of pipe

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Machine Design
In static loading, stress concentration is more serious in

Brittle as well as ductile materials
Elastic materials
Ductile materials
Brittle materials

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Machine Design
A double fillet welded joint with parallel fillet weld of length 'l' and leg 's' is subjected to a tensile force 'P'. Assuming uniform stress distribution, the shear stress in the weld is given by

2P/s.l
√2P/s.l
P/√2.s.l
P/2.s.l

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Machine Design
When the bearing is subjected to large fluctuations of load and heavy impacts, the bearing characteristic number should be _________ the bearing modulus.

10 times
5 times
20 times
15 times

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