Technician A says aluminum expands at a different rate than cast iron. Technician B says cast iron has a coefficient of thermal expansion two or three times greater than aluminum. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Question

Quizplus · Accepted Answer

Technician A is correct because aluminum does indeed expand at a different rate than cast iron, but it is aluminum that has a higher coefficient of thermal expansion, not cast iron as Technician B suggests.

Technician a Says Aluminum Expands at a Different Rate Than