The shock absorbing capacity of a bolt can be increased by

How can shock absorbing capacity of a bolt be increased

A

By tightening it properly

B

By increasing the shank diameter

C

By grinding the shank

D

By making the shank diameter equal to the core diameter of thread

The shock absorbing capacity of bolt can be increased by making the shank diameter ________ the root diameter.

A

Lesser than

B

Equal to

C

Greater than

D

No effect

A wall bracket is attached to the wall by means of 2 identical bolts, one at A and one at B. The force of 20kN acts at a distance of 400mm. Bolt A lies at a distance of 50mm from axis of tilt and bolt B 500mm. Allowable shear stress in the bolts is 100N/mm² and tensile is 40N/mm². Find the radius of Mohr circle which can be made from the shear stress and tensile stress acting on bolts.(Consider bolt under max stress and area of bolt is A)

A

10000/A N/mm²

B

6378.5/A N/mm²

C

10755.7/A N/mm²

D

None of the listed

The shock absorbing capacity of a bolt may be increased by

A

Increasing its shank diameter

B

Decreasing its shank diameter

C

Tightening the bolt properly

D

Making the shank diameter equal to core diameter of thread

Consider the following statements regarding typical analysis of bolt failure : 1. 15% failure of bolt occur at the fillet under the head. 2. 50% failure of bolt occur at the end of threads on the shank. 3. 80% failure of bolt occur in the threads that are in contact with the nut. Which of the above statements is/are correct ?

A

1 only

B

3 only

C

2 and 3 only

D

1, 2 and 3

Nominal bearing strength of bolt is 2.5kbdtfu where kb depends on (i) end distance, (ii)pitch distance, (iii)ultimate tensile stress of bolt, (iv)shank area of bolt, (v)yield stress of bolt, (vi)diameter of hole

A

i, ii, iv, v

B

i, ii, iii, vi

C

ii, iii, iv, v

D

iii, iv, v, vi

Which of the following stresses are associated with the tightening of a nut on a bolt? P. Tensile stress due to the streching of bolt Q. Bending stress due to the bending of bolt R. Torsional shear stress due to frictional resistance between the nut and the bolt Select the correct answer using the codes given below.

A

P and Q

B

P and R

C

Only p

D

R and Q

The shock absorbing capacity of bolts can be increased by

A

Increasing the shank diameter

B

Decreasing the length of shank portion of bolt

C

Increase the shank diameter and decreasing the length of shank

D

None of the listed

Pitch of the given bolt is 10 mm. The bolt completed the ½ revolution in the forward direction. How much the bolt advances through axis?

A

10 mm

B

5 mm

C

2.5 mm

D

20 mm

Which of the following stresses are associated with the tightening of a nut on a bolt? P. Crushing and shear stress in threads Q. Bending stress due to the bending of bolt R. Torsional shear stress due to frictional resistance between the nut and the bolt Select the correct answer using the codes given below:

A

P and Q

B

P and R

C

Only P

D

Only R

The shock absorbing capacity of a bolt can be increased by

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