Technician A says that engine components made from different materials thermal expand at different rates. Technician B says that the gasket must be able to withstand scrubbing or even shearing during uneven expansion and contraction while maintaining its seal. Who is correct?
A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

Both technicians are correct. Engine components made from different materials have different coefficients of thermal expansion, which means they expand and contract at different rates when exposed to heat. This can lead to uneven expansion and contraction, which can cause the gasket to be scrubbed or sheared. Therefore, the gasket must be able to withstand this stress and maintain its seal.

Technician a Says That Engine Components Made from Different Materials