Journeyman Electrician Practice Test

Journeyman Electrician Practice Test

The Journeyman Electrician Practice Test is a test made according to the National Electric Code (NEC) standard that provides safety in the installation of electrical wiring and components.

Take our test to prepare yourself best before your exam day and get the certificate and license you need.

Our test contains 20 questions that cover topics like wiring methods, protection, and materials as well as a communication system, special conditions, occupancies, and equipment, etc.

The Journeyman Electrician Practice Test is made as per the NEC 2014 Code.

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Journeyman Electrician Practice Test

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Question 1
When a Electro-Static Charge is connected to the ground, the charge dissipates to the ground. Is it true or false?
A
True
B
False
Question 1 Explanation: 
When a Electro-Static Charge is connected to the ground, the charge dissipates to the ground.
Question 2
What will be the equivalent resistance of three resistances each of 3Ω connected in parallel?
A
1 Ω
B
1.5 Ω
C
9 Ω
D
4.5 Ω
Question 2 Explanation: 
1/Req =1/3+1/3+1/3 =3/3 =1Ω
Question 3
Please mark the range that signifies a power factor of induction motor during no-load condition:
A
0.7
B
0.2
C
0.9
D
0.5
Question 3 Explanation: 
Induction motor during no load condition will draw high current in the range of 0.2.
Question 4
Please mark the principle on which electrical generator works:
A
Amperes rule
B
Maxwell's law
C
Fleming’s right hand rule
D
Fleming’s left hand rule
Question 4 Explanation: 
Electrical Generator works on the principle of Fleming’s right-hand rule.
Question 5
What can represent motor load in general?
A
Inductance
B
Resistance
C
Resistance, Inductance and Capacitance
D
Both resistance and inductance
Question 5 Explanation: 
Both resistance and inductance represent any carrying conductor.
Question 6
When non-linear loads such as electronic devices are connected to the supply system, voltage, and current flowing in the system will be distorted and result in harmonics generation. is it true or false?
A
True
B
False
Question 6 Explanation: 
A non-sinusoidal voltage and current waveforms are generated when a nonlinear load is connected to the supply system.
Question 7
The Wattmeter measures power in:
A
DC circuits
B
AC circuits
C
Both of the above circuits
D
None of the above circuits
Question 7 Explanation: 
Both AC and DC circuits can be measured with a Wattmeter.
Question 8
Please mark the wattage of a lamp operated at 120V that has a resistance of 10 Ω:
A
1 kW
B
1.44 kW
Question 8 Explanation: 
P = V2/R = (120)2/10 = 1440 Watts
Question 9
What is the equivalent resistance of the circuit if the resistance of 5ohms is connected in series with a parallel of four resistances, each of 1 ohm?
A
4.75 ohms
B
5.25 ohms
Question 9 Explanation: 
5 ohm series + 4 parallel circuits each 1 ohm = 5+0.25 = 5.25 ohms
Question 10
Please mark the quantity that will remain the same in a series of an electrical circuit:
A
Electrical voltage
B
Electrical resistance
C
Electrical current
D
Electrical power
Question 10 Explanation: 
Electrical current remains the same.
Question 11
How does transformer oil which is used in the electrical transformer act?
A
As an insulating material
B
As a coolant
C
Both as an insulating material and a coolant
Question 11 Explanation: 
Transformer oil used in the electrical transformer acts as a coolant and an insulating material.
Question 12
Is it true that the voltage waveform will lag behind the current waveform in a circuit supplying power to capacitive loads?
A
Yes
B
No
Question 12 Explanation: 
The voltage waveform will lag behind the current waveform in a circuit supplying power to capacitive loads.
Question 13
Please mark the machine which has higher efficiency:
A
Induction motor
B
DC Motor
C
Electrical transformer
D
Synchronous machine
Question 13 Explanation: 
The electrical transformer will have higher efficiency.
Question 14
Single Phase Induction Motor is not self-starting and it cannot produce a rotating magnetic field like a 3-phase induction motor. Is it true or false?
A
True
B
False
Question 14 Explanation: 
Single Phase Induction Motor is not self-starting and it cannot produce a rotating magnetic field like a 3-phase induction motor.
Question 15
What can be measured with megger?
A
Voltage
B
Power factor
C
Resistance
D
Ampere-hour
Question 15 Explanation: 
Resistance can be measured with megger.
Question 16
Please mark the percentage which shows the efficiency if a 10-hp motor draws 40 amps at 240V:
A
77.7 %
B
96.5%
C
86.1 %
D
97.1%
Question 16 Explanation: 
P in = V x I = 240 x 40 = 9600 watts Efficiency = (Pout x 746) / Pin = (10 x 746) / 9600 = 0.777
Question 17
Please mark the correct answer of the following:R = V2/P = (240)2/40 =
A
1380 Ohms
B
1440 Ohms
C
1250 Ohms
D
1400 Ohms
Question 17 Explanation: 
R = V2/P = (240)2/40 = 1440 Ohms
Question 18
Please mark the material used in the fuse:
A
Copper
B
Lead
C
Iron
D
Tin
Question 18 Explanation: 
Tin is the material used in the fuse.
Question 19
What are the wasteful circulating currents generated in the core which does no useful work?
A
Eddy Currents
B
Core Currents
C
Hysteresis Currents
D
None of the above
Question 19 Explanation: 
Eddy Currents are the wasteful circulating currents generated in the core which does no useful work.
Question 20
Please mark the power in watts according to the following:P = V x I x Cos(phi) = 120 x 12 x 1/2 =
A
720 watts
B
850 watts
Question 20 Explanation: 
P = V x I x Cos(phi) = 120 x 12 x 1/2 =720 watts
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