Ground fault receptacles contain ____.
a. a relay coil
b. a spherical transformer
c. a manual sensing circuit
d. different circuitry than the circuit breaker
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When servicing an integral wheel bearing hub, the hub nut should be tightened with an impact wrench.
Answer the following statement true (T) or false (F)
What is the number of conductors and the wire size specified for the feeder circuit supplying rooftop unit No. 1 in the power-riser diagram in Figure 3?
a. Three No. 10 AWG
b. Four No. 2 AWG
c. Three No. 6 AWG
d. Four No. 4/0 AWG
The NEC® article that covers the installation of pools and spas is _____.
a. NEC Article 250 b. NEC Article 340 c. NEC Article 680 d. NEC Article 725
Which type of renewable energy resource can cause thermal pollution?
a. impoundment hydropower c. in-stream hydropower b. pumped storage d. diversion hydropower