Question

In a horizontal engine, reciprocating parts are retarded when the piston moves from _________

(a) TDC to BDC

(b) BDC to TDC

(c) Midway to TDC

(d) BDC to midway

I had been asked this question during an online interview.

I need to ask this question from Forces on the Reciprocating Parts of an Engine Neglecting Weight of the Connecting Rod topic in division Inertia Forces in Reciprocating Parts of Machine Dynamics

Answer 1

Correct choice is (b) BDC to TDC

The explanation is: The reciprocating parts of a horizontal engine are accelerated during the latter half of the stroke, i.e when the piston moves from inner dead center to outer dead center and retards when the piston moves from outer dead center to inner dead center.