Valve face and valve seat reconditioning is being discussed. Technician A says that when an interference angle is used, both the valve and the seat are machined at exactly the same degree cut. Technician B says that as the valve seat is cut, the valve stem height increases. Who is correct?
A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

Technician B is correct. As the valve seat is cut, the valve stem height increases. Technician A is incorrect because when an interference angle is used, the valve and seat are machined at slightly different angles to ensure a tight seal.

Valve Face and Valve Seat Reconditioning Is Being Discussed