Bimetal strip type overload relays can often be adjusted for a higher setting to offset the problem of___________ .
A)low noise
B)ambient temperature
C)moisture
D)excessive wind

Question

Quizplus · Accepted Answer

Bimetal strip type overload relays use a bimetallic strip to sense the heat generated by the current flowing through the motor. As the ambient temperature increases, the bimetal strip may become more sensitive and trip the overload relay at a lower current level. By adjusting the setting of the relay to a higher value, the problem of tripping at a lower current level due to increased ambient temperature can be offset. Therefore, the correct choice is B, ambient temperature. Bimetal strip type overload relays are sensitive to changes in ambient temperature, which can cause the relay to trip prematurely or not trip at all when needed. By adjusting the relay for a higher setting, it can handle higher temperatures without tripping, solving the problem of ambient temperature affecting the relay's performance.

Bimetal Strip Type Overload Relays Can Often Be Adjusted for a Higher