Question

The effect of an unbalanced primary force perpendicular to the line of stroke is to produce _____

(a) Variation in pressure on the rails

(b) Variation in tractive force

(c) Swaying couple

(d) Piston effort

The question was posed to me during an online interview.

Enquiry is from Effect of Partial Balancing of Reciprocating Parts of Two Cylinder Locomotives topic in section Balancing of Reciprocating Masses of Machine Dynamics

Answer 1

Right choice is (a) Variation in pressure on the rails

Explanation: The effect of an unbalanced primary force along the line of stroke is to produce Swaying couple and variation in tractive force along the line of stroke and The effect of an unbalanced primary force perpendicular to the line of stroke is to produce variation in pressure on the rails.