A shaft is subjected to a maximum bending stress of 80 N/mm² and maximum shearing stress equal to 30 N/mm² at a particular section. If the yield point in tension of the material is 280 N/mm² and the maximum shear stress theory of failure is used, then the factor of safety obtained will be

Machine Design
A shaft is subjected to a maximum bending stress of 80 N/mm² and maximum shearing stress equal to 30 N/mm² at a particular section. If the yield point in tension of the material is 280 N/mm² and the maximum shear stress theory of failure is used, then the factor of safety obtained will be

3

2.5

3.5

2.8

3

2.5

3.5

2.8

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Machine Design
Oil in journal bearing should be applied at the point where load is

Maximum

Any one of the above

Average

Nil or lightest

Maximum

Any one of the above

Average

Nil or lightest

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Machine Design
In cross or regular lay ropes

Wires are not twisted

Wires in two adjacent strands are twisted in opposite direction

Direction of twist of wires in strands is opposite to the direction of twist of strands

Direction of twist of wires and strands are same

Wires are not twisted

Wires in two adjacent strands are twisted in opposite direction

Direction of twist of wires in strands is opposite to the direction of twist of strands

Direction of twist of wires and strands are same

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Machine Design
In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by

Would depend upon other factors

Decreasing the cross-section area of bar

Remain unaffected with cross-section area

Increasing the cross-section area of bar

Would depend upon other factors

Decreasing the cross-section area of bar

Remain unaffected with cross-section area

Increasing the cross-section area of bar

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Machine Design
The rolling contact bearings are known as

Plastic bearings

Thin lubricated bearings

Thick lubricated bearings

Antifriction bearings

Plastic bearings

Thin lubricated bearings

Thick lubricated bearings

Antifriction bearings

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Machine Design
In most machine members, the damping capacity of the material should be

Low

Zero

High

Could be anything

Low

Zero

High

Could be anything

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Machine Design

Machine Design Oil in journal bearing should be applied at the point where load is

Machine Design In cross or regular lay ropes

Machine Design In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by

Machine Design The rolling contact bearings are known as

Machine Design In most machine members, the damping capacity of the material should be

Machine Design
Oil in journal bearing should be applied at the point where load is

Machine Design
In cross or regular lay ropes

Machine Design
In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by

Machine Design
The rolling contact bearings are known as

Machine Design
In most machine members, the damping capacity of the material should be