New York Master Electrician Class Comprehensive
Final Exam Review 2026 | High-Yield Study Guide
1. Describe the significance of knowing the specific resistance of copper wire in
electrical installations.
It is important for understanding the thermal expansion of copper wire
during installations.
The specific resistance of copper wire is only relevant for theoretical
calculations and not practical applications.
Knowing the specific resistance of copper wire is crucial for
calculating voltage drop and ensuring efficient electrical
performance.
Specific resistance helps in determining the color coding of wires used
in installations.
2. Find the resistance of 6 AWG copper wire 550 feet long. Assume a
temperature of 20 degrees Celsius.
0.218 ohm
4.59 ohm
0.159 ohm
0.00201 ohm
3. What is the formula to calculate the circular mil area of a round conductor?
Area = π * (Radius in inches)^2
Area = (Diameter in mils)^2
Area = 2 * π * (Diameter in inches)
Area = (Diameter in inches)^2
,4. If a technician needs to perform maintenance on a piece of equipment that
requires rear access and the space available is only 2 feet, what safety
measures should be taken?
Ensure the equipment is properly de-energized and use
appropriate tools to work safely within the limited space.
Increase the distance to 3 feet by moving other equipment.
Use a ladder to reach the parts without concern for distance.
Proceed with maintenance without any additional precautions.
5. Exposed live parts of motors shall be guarded against accidental contact, if
the voltage between the terminals is:
24 Volts or greater.
200 Volts or greater.
115 Volts or greater.
50 Volts or greater.
6. Describe the role of the feeder in an electrical wiring system.
The feeder is the main source of electrical energy for the entire
building.
The feeder connects the point of distribution to the branch circuit
overcurrent device, allowing for the distribution of electrical power.
The feeder protects the wiring system from overloads and short
circuits.
The feeder is responsible for converting AC to DC power.
7. The area of a conductor whose diameter is 0.001 inch is equal to
, One micron
One circular mil
One steradian
One angstrom
8. What color is used for the outer finish of an insulated grounded conductor?
Black
Red
Green
White or gray
9. Describe the importance of maintaining the minimum horizontal working
space around electrical equipment.
Maintaining the minimum horizontal working space ensures safe
access for maintenance and reduces the risk of accidents.
It allows for more equipment to be installed in a smaller area.
The minimum horizontal working space is only necessary for aesthetic
purposes.
The minimum horizontal working space is irrelevant to safety
standards.
10. Describe the importance of having a minimum number of receptacle outlets
in hotel and motel guest rooms as per electrical regulations.
Having a minimum number of receptacle outlets ensures that
guests have adequate access to power for devices, promoting
safety and convenience.
, The number of receptacle outlets is determined by the size of the
room.
More receptacle outlets increase the risk of electrical hazards.
The minimum number of receptacle outlets is irrelevant to guest
comfort.
11. In straight pulls the length of the box or conduit body shall not be less than 8
times the trade size of the largest raceway. Therefore, what would be the
required size for the box side that has 2 inch conduit entry ?
16 inches
10 inches
12 inches
4 inches
12. At least one receptacle outlet shall be installed within ___ of the top of a
show window for each 12 linear feet measured horizontally across its length.
24
30
12
18
13. Describe the significance of a watt-hour meter in electrical installations.
A watt-hour meter is significant because it measures the resistance of
electrical components.
A watt-hour meter is significant because it indicates the maximum
load a circuit can handle.
Final Exam Review 2026 | High-Yield Study Guide
1. Describe the significance of knowing the specific resistance of copper wire in
electrical installations.
It is important for understanding the thermal expansion of copper wire
during installations.
The specific resistance of copper wire is only relevant for theoretical
calculations and not practical applications.
Knowing the specific resistance of copper wire is crucial for
calculating voltage drop and ensuring efficient electrical
performance.
Specific resistance helps in determining the color coding of wires used
in installations.
2. Find the resistance of 6 AWG copper wire 550 feet long. Assume a
temperature of 20 degrees Celsius.
0.218 ohm
4.59 ohm
0.159 ohm
0.00201 ohm
3. What is the formula to calculate the circular mil area of a round conductor?
Area = π * (Radius in inches)^2
Area = (Diameter in mils)^2
Area = 2 * π * (Diameter in inches)
Area = (Diameter in inches)^2
,4. If a technician needs to perform maintenance on a piece of equipment that
requires rear access and the space available is only 2 feet, what safety
measures should be taken?
Ensure the equipment is properly de-energized and use
appropriate tools to work safely within the limited space.
Increase the distance to 3 feet by moving other equipment.
Use a ladder to reach the parts without concern for distance.
Proceed with maintenance without any additional precautions.
5. Exposed live parts of motors shall be guarded against accidental contact, if
the voltage between the terminals is:
24 Volts or greater.
200 Volts or greater.
115 Volts or greater.
50 Volts or greater.
6. Describe the role of the feeder in an electrical wiring system.
The feeder is the main source of electrical energy for the entire
building.
The feeder connects the point of distribution to the branch circuit
overcurrent device, allowing for the distribution of electrical power.
The feeder protects the wiring system from overloads and short
circuits.
The feeder is responsible for converting AC to DC power.
7. The area of a conductor whose diameter is 0.001 inch is equal to
, One micron
One circular mil
One steradian
One angstrom
8. What color is used for the outer finish of an insulated grounded conductor?
Black
Red
Green
White or gray
9. Describe the importance of maintaining the minimum horizontal working
space around electrical equipment.
Maintaining the minimum horizontal working space ensures safe
access for maintenance and reduces the risk of accidents.
It allows for more equipment to be installed in a smaller area.
The minimum horizontal working space is only necessary for aesthetic
purposes.
The minimum horizontal working space is irrelevant to safety
standards.
10. Describe the importance of having a minimum number of receptacle outlets
in hotel and motel guest rooms as per electrical regulations.
Having a minimum number of receptacle outlets ensures that
guests have adequate access to power for devices, promoting
safety and convenience.
, The number of receptacle outlets is determined by the size of the
room.
More receptacle outlets increase the risk of electrical hazards.
The minimum number of receptacle outlets is irrelevant to guest
comfort.
11. In straight pulls the length of the box or conduit body shall not be less than 8
times the trade size of the largest raceway. Therefore, what would be the
required size for the box side that has 2 inch conduit entry ?
16 inches
10 inches
12 inches
4 inches
12. At least one receptacle outlet shall be installed within ___ of the top of a
show window for each 12 linear feet measured horizontally across its length.
24
30
12
18
13. Describe the significance of a watt-hour meter in electrical installations.
A watt-hour meter is significant because it measures the resistance of
electrical components.
A watt-hour meter is significant because it indicates the maximum
load a circuit can handle.
