The metals most often used in a bimetal temperature control are ____.
A) copper and brass
B) copper and steel
C) brass and steel
D) brass and aluminum

Question

The metals most often used in a bimetal temperature control are  ____.
A) copper and brass
B) copper and steel
C) brass and steel
D) brass and aluminum

Quizplus · Accepted Answer

Brass and steel are the most commonly used metals in a bimetal temperature control because they have different coefficients of thermal expansion, allowing the bimetallic strip to bend when heated and break the electrical contact inside the control. Copper and aluminum have similar coefficients of thermal expansion, and copper and steel do not have a large enough difference in expansion to be effective in a bimetallic strip.

The Metals Most Often Used in a Bimetal Temperature Control