2021 Version

Electrician Practice Test

Take a free Electrician Practice Test to see what kind of questions are on actual electrician license exams. Most states require an electrician to pass an exam to recieve a journeyman or master electrician license. State exams cover such areas as Electrical Theory, Trade Knowledge, Grounding and Bonding, Wiring Methods and Installation, Overcurrent Protection, Load Calculations, etc.

To prepare for your actual Electrician Exam, these two practice exams by Ray Holder (Master Electrician and Certified Electrical Trade Instructor) have 300 questions with fully explained answers:

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1.	Which of the following is not a type of service disconnect?
		a. Knife blade switch
		b. Fuse block
		c. Circuit Breakers
		d. Bus Bar
Incorrect answer. Please choose another answer.

2.	If a grounded conductor is attached to the disconnect switch, which type of service disconnect must be used?
		a. Circuit breakers
		b. Knife Blade Switch
		c. Fuse Block
		d. None of the above
Incorrect answer. Please choose another answer.

3.	What is the most frequently used wire size for interior wiring?
		a. 10 AWG
		b. 12 AWG
		c. 15 AWG
		d. 18 AWG
Incorrect answer. Please choose another answer.

4.	If you have four to six 12 AWG wires in a conduit, what would be the allowable current-carrying capacity in percentage to the normal?
		a. 50%
		b. 60%
		c. 70%
		d. 80%
Incorrect answer. Please choose another answer.

5.	If a box is to contain four No. 10 conductors and two No. 12 conductors, what is the minimum sized box that can be used in cubic inches?
		a. 12
		b. 13 1/2
		c. 14 1/2
		d. 15
Incorrect answer. Please choose another answer.

6.	A run of electrical conduit may not have more than _____________ quarter bends between fittings and outlets?
		a. 2
		b. 3
		c. 4
		d. 5
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7.	The total load on any single overcurrent device in a panelboard must not exceed 80 percent of its capacity where the load continues for 3 or more hours to avoid overheating of the conductor.
		True
		False
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8.	A fuse should be rated higher than the lowest rated component in a panelboard to be protected.
		True
		False
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9.	Which of the following locations would most likely require installation of a ground fault circuit interrupter?
		a. living room
		b. closet
		c. bedroom
		d. bathroom
Incorrect answer. Please choose another answer.

10.	An open circuit occurs in a wiring system when _____________________.
		a. the system is working properly
		b. a conductor is broken or separated
		c. a fuse is installed
		d. None of the above
Incorrect answer. Please choose another answer.

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11.	Short circuits or grounds can be all of the following except __________________.
		a. Solid
		b. Partial
		c. Floating
		d. Contracted
Incorrect answer. Please choose another answer.

12.	Which phase is probably open when you test Phase A and Phase B and get a low voltage reading, test Phase B and C and get a normal reading and test Phase A and C and get a low voltage reading?
		a. Phase A
		b. Phase B
		c. Phase C
		d. None of the above
Incorrect answer. Please choose another answer.

13.	In residential buildings, small appliance loads should have two or more ________________.
		a. 15 ampere branch circuits
		b. 20 ampere branch circuits
		c. 40 ampere branch circuits
		d. 50 ampere branch circuits
Incorrect answer. Please choose another answer.

14.	What law would you use to determine the voltage of a power supply?
		a. Coulomb's Law
		b. Kirchoff's Law
		c. Ohm's Law
		d. None of the above
Incorrect answer. Please choose another answer.

15.	Ohm's law states ____________________.
		a. Voltage = amps x resistance
		b. Voltage = current / resistance
		c. Voltage = watts x current
		d. Voltage = current/watts
		e. None of the above
Incorrect answer. Please choose another answer.

16.	The amount that a given conductor resists the flow of electric current is measured in___________.
		a. Watts
		b. Volts
		c. Iambs
		d. Coulombs
		e. Ohms
Incorrect answer. Please choose another answer.

17.	Which law holds that like-charged objects repel and opposite- charged objects attract?
		a. Coulomb's Law
		b. Kirchoff's Law
		c. Ohm's Law
		d. None of the above
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18.	Direct current can change direction.
		True
		False
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19.	Alternating current changes direction at which of the following frequencies?
		a. 40 Hz
		b. 50 Hz
		c. 60 Hz
		d. 70 Hz
		e. None of the above
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20.	Electron Theory and Conventional Theory hold opposite current flow directions.
		True
		False
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21.	Which of the following will not affect the resistance of a circuit?
		a. Length of the Conductor
		b. Diameter of the Conductor
		c. Insulation of the Conductor
		d. Temperature
		e. Physical Condition
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22.	The greater the resistance, the more power is dissipated in the form of heat energy.
		True
		False
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23.	Which of the following are a source of electricity?
		a. Friction
		b. Heat
		c. Light
		d. Pressure
		e. Chemical action
		f. All of the above
Incorrect answer. Please choose another answer.

24.	In a series circuit, the current has ___________ path(s) to take.
		a. 1
		b. 2
		c. 3
		d. 4
		e. 5
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25.	When connecting a voltmeter lnto a DC circuit, what should be observed?
		a. Power Factor
		b. Rms
		c. Resistance
		d. Polarity
Incorrect answer. Please choose another answer.