ELEC UNIT 14

Question 1

(14.1) What 3 areas do open-type motors fail?

Answer 1

windings, centrifugal switch, bearings.

Question 2

(14.1) What is the only area of a hermetic motor that can be checked?

Answer 2

the windings

Question 3

(14.2) how much voltage loss across a contactor is acceptable?

Answer 3

no more that 5% the line voltage

Question 4

(14.2) what does 0 resistance, infinite resistance, and some resistance mean on a coil of a contactor?

Answer 4

0 ohms means its shorted, infinite resistance means its open, some resistance means its probably good.

Question 5

(14.3) How do you troubleshoot a circuit breaker?

Answer 5

check the voltage on the load side of the circuit. if it reads line voltage, then its probably good.