Question

Theoretically, the inlet valve should open at what position of the piston?

(a) Bottom dead centre

(b) Side centre position

(c) Bottom side position

(d) Top dead centre

The question was posed to me in an interview for internship.

My question is based upon Valve Timing topic in section Valve Timing Technologies of Automotive Engine Design

Answer 1

Correct option is (d) Top dead centre

To elaborate: Theoretically the inlet valve should open at Top dead position of the piston and the inlet valve should close at Bottom dead centre position of the piston.