Mechanical Engineering - Theory of machines

41. 

The pressure angle of a cam is the angle between the direction of the follower motion and a normal to the

A. pitch circle
B. base circle
C. pitch curve
D. prime circle

Answer: Option C

Explanation:

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42. 

A pair of friction discs is an example of rolling pair.

A. True
B. False

Answer: Option B

Explanation:

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43. 

In order to balance the reciprocating masses,

A. primary forces and couples must be balanced
B. secondary forces and couples must be balanced
C. both (a) and (b)
D. none of these

Answer: Option C

Explanation:

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44. 

In a screw jack, the effort required to lower the load W is given by

A. P = W tan(α - φ)
B. P = W tan(α + φ)
C. P = W tan(φ - α)
D. P = W cos(α + φ)

Answer: Option C

Explanation:

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45. 

An automobile steering gear is an example of

A. sliding pair
B. rolling pair
C. lower pair
D. higher pair

Answer: Option C

Explanation:

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