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

2.5

2.8

3.5

3.0

2.5

2.8

3.5

3.0

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Machine Design
The anti-friction bearings

Have high initial cost

All of these

Have low starting and low running friction at moderate speeds

Can carry both radial and thrust loads

Have high initial cost

All of these

Have low starting and low running friction at moderate speeds

Can carry both radial and thrust loads

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Machine Design
In a horizontal flat belt drive, it is customary to use

Idler pulley

None of these

Top side of belt as slack side

Bottom side of belt as slack side

Idler pulley

None of these

Top side of belt as slack side

Bottom side of belt as slack side

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Machine Design
In order to determine the stresses in a thin cylinder due to an internal pressure, it is assumed that

All of these

The effect of the restraining action of the heads at the end of the pressure vessel is neglected

The tensile stresses are uniformly distributed over the section of the walls

The effect of curvature of the cylinder wall is neglected

All of these

The effect of the restraining action of the heads at the end of the pressure vessel is neglected

The tensile stresses are uniformly distributed over the section of the walls

The effect of curvature of the cylinder wall is neglected

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Machine Design
Tearing resistance required to tear off the plate per pitch length is (where p = Pitch of rivets, d = Dia. of rivet hole, and σt = Permissible tensile stress for plate material)

p.t.σt

p.d.σt

(p - d) t.σt

p.t.σt

p.d.σt

(p - d) t.σt

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Machine Design
A sliding bearing which operates without any lubricant present, is called

Hydrodynamic lubricated bearing

Zero film bearing

Boundary lubricated bearing

Hydrostatic lubricated bearing

Hydrodynamic lubricated bearing

Zero film bearing

Boundary lubricated bearing

Hydrostatic lubricated bearing

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Machine Design

Machine Design The anti-friction bearings

Machine Design In a horizontal flat belt drive, it is customary to use

Machine Design In order to determine the stresses in a thin cylinder due to an internal pressure, it is assumed that

Machine Design Tearing resistance required to tear off the plate per pitch length is (where p = Pitch of rivets, d = Dia. of rivet hole, and σt = Permissible tensile stress for plate material)

Machine Design A sliding bearing which operates without any lubricant present, is called

Machine Design
The anti-friction bearings

Machine Design
In a horizontal flat belt drive, it is customary to use

Machine Design
In order to determine the stresses in a thin cylinder due to an internal pressure, it is assumed that

Machine Design
Tearing resistance required to tear off the plate per pitch length is (where p = Pitch of rivets, d = Dia. of rivet hole, and σt = Permissible tensile stress for plate material)

Machine Design
A sliding bearing which operates without any lubricant present, is called