Deck 15: Review

Question 1

Dry transformers use____________________ for cooling.

Answer 1

air

Question 2

Protection provided by oil immersion is identified by the letter ____________________.

Answer 2

o

Question 3

Alternating current travels in three directions in a circuit.

Answer 3

False

Question 4

A step-down transformer has 20 turns on the primary winding and 10 turns on the secondary winding.Find the turns ratio.

Question 5

What is the purpose of ground fault protection?

Question 6

Electric welders are of the arc type and the resistance type.

Question 7

The purpose of overcurrent protection is to open a circuit if the temperature in the wiring or equipment rises to an excessive or dangerous level.

Question 8

With under ___________________ volts, enough current generally will not flow through the body to be harmful to a human.

Question 9

A fuel cell is like a battery except, rather than requiring periodic recharging, it runs continuously as long as it gets a constant supply of hydrogen gas and oxygen.

Question 10

A(n) ____________________ area is required to have six receptacles at the patient bed location.

Question 11

A source of ____________________ is the neutral wire of the feeder to a farm building.

Question 12

What is the output for a solar photovoltaic device?

Question 13

Heat is proportional to ____________________ squared.

Question 14

Comparing the combination type AFCI to the branch/feeder type AFCI, which is better at detecting series arcing conditions?

Question 15

A(n) ____________________ area is one in which the hazardous material is likely to be present.

Question 16

The raceway in cellular concrete floor slabs is metal.

Question 17

A multifamily dwelling has 7 living units -two with 10-kW electric ranges, three with 6-kW electric ranges, and two with 16-kW electric ranges.Determine the average rating range for the 7 living units.

Question 18

Why does an electric motor require overcurrent protection?

Question 19

The voltage drop across an incandescent light bulb is 200 volts, and the current flow through the light bulb is 2.0 amperes.Determine the resistance of the light bulb filament when it is lighted.

Question 20

A continuous load is one that operates for ___________________ hours or more.