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

2.8

3.5

3

2.5

2.8

3.5

3

2.5

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Machine Design
The ends of the leaves of a semi-elliptical leaf spring are made triangular in order to

Have variable bending moment (M) in each leaf

Permit each leaf to act as an overhanging beam

Obtain variable moment of inertia (I) in each leaf

Make M/I constant throughout the length of the leaf

Have variable bending moment (M) in each leaf

Permit each leaf to act as an overhanging beam

Obtain variable moment of inertia (I) in each leaf

Make M/I constant throughout the length of the leaf

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Machine Design
According to I.B.R., the efficiency of a triple riveted butt joint with double straps of unequal width (5 rivets per pitch length) should be

80 to 90%

63 to 70%

70 to 83%

45 to 60%

80 to 90%

63 to 70%

70 to 83%

45 to 60%

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Machine Design
The maximum normal stress theory is used for

Non-ferrous materials

Brittle materials

Plastic materials

Ductile materials

Non-ferrous materials

Brittle materials

Plastic materials

Ductile materials

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Machine Design
Which of the following has threads at both ends?

Bolt

None of these

Stud

Tap bolt

Bolt

None of these

Stud

Tap bolt

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Machine Design
If shearing stress in nut is half the tensile stress in a bolt, then nut length should be equal to

Diameter of bolt

0.75 × diameter of bolt

1.5 × diameter of bolt

1.25 × diameter of bolt

Diameter of bolt

0.75 × diameter of bolt

1.5 × diameter of bolt

1.25 × diameter of bolt

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Machine Design

Machine Design The ends of the leaves of a semi-elliptical leaf spring are made triangular in order to

Machine Design According to I.B.R., the efficiency of a triple riveted butt joint with double straps of unequal width (5 rivets per pitch length) should be

Machine Design The maximum normal stress theory is used for

Machine Design Which of the following has threads at both ends?

Machine Design If shearing stress in nut is half the tensile stress in a bolt, then nut length should be equal to

Machine Design
The ends of the leaves of a semi-elliptical leaf spring are made triangular in order to

Machine Design
According to I.B.R., the efficiency of a triple riveted butt joint with double straps of unequal width (5 rivets per pitch length) should be

Machine Design
The maximum normal stress theory is used for

Machine Design
Which of the following has threads at both ends?

Machine Design
If shearing stress in nut is half the tensile stress in a bolt, then nut length should be equal to