15 Questions

Questions and Answers

- 1.The rate of the flow of the current is equal to the electromotive force divided by resistance.
- A.
Pythagorean Theorem

- B.
Ohm’s Law

- C.
Olin’s Law

- D.
Horsepower

- 2.An appliance is rated at 1,200 watts, and is connected to 120 volts. How much current will it draw?
- A.
1A

- B.
10A

- C.
100A

- D.
Cannot be determined from the information given

- 3.The total voltage in a series circuit is equal to the sum of the voltages across all parts of the circuit
- A.
True

- B.
False

- 4.The total resistance of a series circuit can never be greater that the largest resistance of a single point on a circuit.
- A.
True

- B.
False

- 5.The Ohm’s Law pie chart contains four quadrants. They represent
- A.
Volts, amps, Ohms, horsepower

- B.
Volts, amps, Ohms, impedance

- C.
Watts, amps, Ohms, inductance

- D.
Volts, amps, Ohms, watts

- 6.In a parallel circuit, the total resistance is _________________ the resistance of any branch
- A.
Always greater than

- B.
Always equal to

- C.
Always less than

- D.
Never less than

- 7.A resistor has a color code of yellow, violet, red, and gold. What is the value of the resistor, including the tolerance?
- A.
4,700 Ohms, +/- 5%

- B.
4.7 Ohms, +/- 10%

- C.
2,400 Ohms, +/- 5%

- D.
24 Ohms, +/- 10%

- E.
3,300 Ohms, +/- 5%

- 8.Three resistors in parallel. Each has a value of 12 Ohms resistance. What is the total resistance of the circuit?
- A.
36 Ohms

- B.
4 Ohms

- C.
40 Ohms

- D.
3.6 Ohms

- 9.A 12v circuit draws a current of 5 amperes. What is the power consumption (watts)?
- A.
2.4 watts

- B.
60 watts

- C.
.416 watts

- D.
None of the above

- 10.A 4 in. x 1 ¼ in. round or octagonal box has a capacity of 12.5 cubic inches. How many number 18 gauge red fire alarm wires can the box hold?
- A.
4

- B.
8

- C.
16

- D.
12

- 11.A half-inch, trade-size EMT conduit has a maximum fill capacity of ________ % with _________ wire(s).
- A.
31%, 4; 40%, 2; and 53%, 1

- B.
31%, 2; 40%, 3; and 53%, 1

- C.
40%, 3 or more; 50%, 2; and 60%, 1

- D.
53%, 1; 40%, more than 2; and 31%, 2

- 12.A2 + B2 = C2 is also referred to as:
- A.
Pylorus’ Theorem.

- B.
Pythagorean Theorem.

- C.
An isosceles triangle.

- D.
A rhombus.

- 13.
- A.
6 in

- B.
18 in

- C.
24 in

- D.
3 ft

- 14.The circumference of a circle can be calculated using the following formula:
- A.
3.1416 x 2 x radius

- B.
3.1416 x radius2

- C.
Radius x square root of 3.1416

- D.
A2 + B2 = C2

- 15.The total resistance of a number of equal resistors in parallel is __________ the resistance of one resistor divided by the number of resistors.
- A.
Less than

- B.
Greater than

- C.
Equal to

- D.
The sum of