Practice Exam 2

A single-phase transformer has a primary voltage of 240 volts and a primary current of 10 amperes. The transformer’s turns ratio is 4:1. What is the secondary voltage and secondary current of this transformer?

A single-phase transformer with a primary voltage of 240V and a secondary voltage of 120V has a rated primary current of 20A. Calculate the rated secondary current of the transformer.

What is the minimum size copper equipment grounding conductor required for a 200 amp feeder, supplying a detached garage located 50 feet from the main service panel?

How many receptacles are required in patient bed (category 1) locations ?

How many receptacles are required in an operating room?

X-ray equipment that will run for 5 minutes or longer.

Burial depth for network powered broad band conductors shall be at lease __________ inches when installed below 2 inch of concrete when installed in RMC.

Network powered broad brand shall maintain a separating of at least _________ ft. from lighting conductors.

What is the Duty Cycle demand factor for a resistance welder with a 40% duty cycle?

Dry type transformers installed indoors and rated 112 1/2 KVA or less shall have a separation of how many inches from combustible material?

What is the minimum burial depth for conductors in intermediate metal conduit that run under a building?

What size copper equipment grounding conductor (EGC) would you select for a service with a 200 amp main breaker with 4/0 copper conductors?

Overhead communication wires near service drops not exceeding 750 volts must have a clearance of ________ inches. of the service drop?

What size copper wire would you select for a 62 amp load that is expected to run for 10 or more hours terminating to 75­°C terminals?

What does the N in THHN Stand for?

For emergency stand by generators that require more than ________ seconds to develop power are permitted to have an auxiliary power supply.

All receptacles within ____________ ft of a pool or spa must be GFCI protected.

6 inch PVC must be supported at a minimum of every __________ Ft.

What is the turn ratio of a transformer that has a 240v primary and a 120v secondary?

What is the total resistance of this parallel circuit?