Mechanical Engineering - Machine Design

26. 

In radial cams, the follower moves

A. in a direction perpendicular to the cam axis
B. in a direction parallel to the cam axis
C. in any direction irrespective of cam axis
D. along the cam axis

Answer: Option A

Explanation:

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27. 

The square threads are not so strong as V-threads but they offer less frictional resistance to motion than Whitworth threads.

A. Correct
B. Incorrect

Answer: Option A

Explanation:

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28. 

According to Unwin's formula, the relation between the diameter of rivet hole (d) and the thickness of plate (t) is given by (where d and t are in mm)

A. d = t
B. d = 1.6 t
C. d = 2 t
D. d = 6 t

Answer: Option D

Explanation:

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29. 

In order to avoid tearing of the plate at an edge, the distance from the centre line of the rivet hole to the nearest edge of the plate should be equal to (where d = Diameter of rivet hole)

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

Answer: Option B

Explanation:

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30. 

The value of stress concentration factor depends upon

A. material of the part
B. geometry of the part
C. material and geometry of the part
D. none of these

Answer: Option C

Explanation:

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