Journeyman Electrician Practice Test- 10
Quiz-summary
0 of 15 questions completed
Questions:
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
Information
Free Online Practice exam Test on Journeyman
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading...
You must sign in or sign up to start the quiz.
You have to finish following quiz, to start this quiz:
Results
0 of 15 questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 points, (0)
Average score |
|
Your score |
|
Categories
- Not categorized 0%
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- Answered
- Review
-
Question 1 of 15
1. Question
1 pointsThe full load current of 3 phase 3 HP continuous duty motor is 50 Amperes with service factor of 1.1. What is its rating of overload separator?
Correct
Incorrect
Refer: NEC 430.32 (A)(1)
Rating of overload separator : 50 * 1.15 = 57.5 ( next lower 55)
-
Question 2 of 15
2. Question
1 pointsThe 240 volts electric circuit consists of feeder and branch circuit, What can be minimum voltmeter reading at receptacle placed at the end of branch circuit?
Correct
Incorrect
Operating Voltage = Voltage Source – Voltage Drop
= 240 V – 5% of 240 = 228 Volts -
Question 3 of 15
3. Question
1 pointsFive Resistors each with 1 ohm are connected in parallel and 5 ohm resistor is connected in series. What is equivalent resistance of the circuit?
Correct
Incorrect
Total Resistance = five parallel + series resistance
= 0.2 + 5 = 5.2 ohms -
Question 4 of 15
4. Question
1 pointsWhat is resistance offered by 50 W tungsten lamp when 240 Volts is applied to it?
Correct
Incorrect
Resistance = E2 / P = 240 2 / 50 = 1152 = 1.152 K ohms
-
Question 5 of 15
5. Question
1 pointsThe full load current of 3 phase 4 HP continuous duty motor is 60ampers with service factor of 1.1. what is its rating of overload separator?
Correct
Incorrect
Separator overload Rating = 60 * 1.15 = 69 amperes (next lower rating 65 amperes)
-
Question 6 of 15
6. Question
1 pointsIn a parallel electric circuit, which of the electrical quantity is same?
Correct
Incorrect
-
Question 7 of 15
7. Question
1 pointsIf the ends of a 1000 ft length of No.10 AWG Copper wire are connected to 48 V source of electricity. What will be the ampere current that flows in the wire?
Correct
Incorrect
1000 ft copper wire has a resistance of 1 Ω .
current = E/ R = 48 / 1 = 48 Amperes -
Question 8 of 15
8. Question
1 pointsIn an electrical circuit the power factor is the ratio of apparent power to the actual power.
Correct
Incorrect
Power Factor = Actual Power / Apparent Power
-
Question 9 of 15
9. Question
1 pointsA 120 volts electrical source is applied to the motor. If the connecting wire has 5% droop what will be the voltmeter indication connected across the motor terminals?
Correct
Incorrect
Voltmeter indication = 120 V – 5% of 120V = 114 V.
-
Question 10 of 15
10. Question
1 pointsIf a 3 phase 240 Volt 4 MW motor consumes 12 Amperes. What is the power factor of a motor?
Correct
Incorrect
The Volt Amperes of motor = 1.732 * 240 * 12 = 4988 VA.
Power factor = 4000/ 4988 = 0.8 = 80%. -
Question 11 of 15
11. Question
1 pointsWhich of the following is an enclosed channel specially designed for holding wires, busbars?
Correct
Incorrect
Refer: NEC 100 Definitions
-
Question 12 of 15
12. Question
1 pointsThe lightening outlet installed at or near heating, air-conditioning and refrigeration equipment shall be controlled ……………
Correct
Incorrect
Refer : NEC 210.70(A)(3)
-
Question 13 of 15
13. Question
1 pointsThe nameplate rated load current of a hermitic motor compressor is 40 amperes, what is the rating of the over current protective device for a circuit supplying the motor?
Correct
Incorrect
Refer: NEC 440.12(A)(1)
Over current protective device rating = 115 % of rated load current = 1.15 * 40 = 46 amperes
-
Question 14 of 15
14. Question
1 pointsA disconnecting means of motors over 600 volts muse be capable of being locked in …………. so that it cannot be inadvertently closed when someone is working on the motor.
Correct
Incorrect
Refer: NEC 430.227
-
Question 15 of 15
15. Question
1 pointsRotating electrical machinery placed in Class II, Division 1 location shall be …………………
Correct
Incorrect
Refer : NEC 502.125 (A)