Which of the following is the primary purpose of the National Electrical Code (NEC)?
Texas Master Electrician Quiz

Quiz
•
Other
•
12th Grade
•
Medium
DIEGO RODRIGUEZ ZAMORANO
Used 1+ times
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24 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
To provide guidelines for electrical engineering design
To ensure the safe installation of electrical wiring and equipment
To regulate the cost of electrical materials
To standardize electrical components
Answer explanation
The primary purpose of the National Electrical Code (NEC) is to ensure the safe installation of electrical wiring and equipment, protecting people and property from electrical hazards.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the minimum gauge of copper wire required for a 20-ampere circuit according to the NEC?
16 AWG
14 AWG
12 AWG
10 AWG
Answer explanation
According to the NEC, the minimum gauge of copper wire for a 20-ampere circuit is 12 AWG. This gauge can safely handle the current without overheating, making it the correct choice.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following materials is NOT typically used for electrical wiring?
Copper
Aluminum
Steel
Gold
Answer explanation
Gold is not typically used for electrical wiring due to its high cost, despite being an excellent conductor. Copper and aluminum are the most common materials, while steel is sometimes used for structural support.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a parallel circuit, if one branch opens, what happens to the total current in the circuit?
It increases
It decreases
It remains the same
It becomes zero
Answer explanation
In a parallel circuit, if one branch opens, the total current decreases because the overall resistance increases, leading to less current flowing through the remaining branches.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a key safety practice when working with electrical systems?
Wearing rubber-soled shoes
Using metal ladders
Working alone
Ignoring warning signs
Answer explanation
Wearing rubber-soled shoes is crucial for safety when working with electrical systems, as they provide insulation and reduce the risk of electrical shock. The other options are unsafe practices.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the formula to calculate electrical power in a circuit?
All of the above
Answer explanation
The formula for electrical power can be expressed in multiple ways: P = IV (power = current x voltage), P = I^2R (power = current squared x resistance), and P = V^2/R (power = voltage squared / resistance). Thus, 'All of the above' is correct.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a common method for troubleshooting electrical systems?
Guessing the problem
Systematic elimination
Replacing all components
Ignoring the issue
Answer explanation
Systematic elimination is a structured approach to identify issues in electrical systems by testing and ruling out potential problems, making it more effective than guessing or replacing all components.
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