# Mechanical Engineering - Machine Design

### Exercise :: Machine Design - Section 9

1.

The springs mostly used in machinery have spring index less than 3.

 A. Correct B. Incorrect

Explanation:

No answer description available for this question. Let us discuss.

2.

According to I.B.R., the distance between the rows of rivets, for equal number of rivets in more than one row for lap joint or butt joint (chain riveting) shall not be less than

 A. d B. 1.5 d C. 2 d D. 2.5 d

Explanation:

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3.

The interference may only be avoided if the addendum circles of the two mating gears cut the common tangent to the base circles between the points of tangency.

 A. True B. False

Explanation:

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4.

The spigot and socket joint is mostly used for pipes which are burried in the earth.

 A. Agree B. Disagree

Explanation:

No answer description available for this question. Let us discuss.

5.

The permissible stress in the fillet weld is 100 N/mm2. The fillet weld has equal leg lengths of 15 mm each. The allowable shearing load on the weldment per cm length of the weld is

 A. 7.5 kN B. 10.6 kN C. 15 kN D. 22.5 kN