LADWP Electrical Mechanic Q&A Bank 2026 | Exam Success
Guide | Graded A+
1. Which AWG wire is capable of carrying the largest amount of current?
8
10
12
14
2. What is the primary cooling method used in a dry type transformer?
Water
Air
Oil
Gas
3. Describe the characteristics of a Type UF conductor and its typical
applications.
Type UF conductor is only used in residential applications without
moisture exposure.
Type UF conductor is designed for wet locations and is suitable for
underground installations.
Type UF conductor has a rigid structure and is used for high-voltage
applications.
Type UF conductor is primarily used for indoor wiring in dry locations.
4. If an electrician discovers a splice in a buried conduit during an inspection,
what should be their immediate course of action according to NEC
, guidelines?
The electrician should report the violation and recommend
corrective measures to remove the splice.
The electrician should replace the entire conduit system.
The electrician should leave the splice as is if it appears functional.
The electrician should cover the splice with additional insulation.
5. Watt is a What? Oops, sorry... I meant to ask, "What is a Watt?".
A unit of energy.
A unit of power.
That was a terrible joke.
A unit of kinetic energy.
6. Describe how a transformer operates in relation to voltage levels in an
electrical circuit.
A transformer uses mechanical components to adjust voltage levels.
A transformer operates by using electromagnetic induction to
increase or decrease voltage levels in an electrical circuit.
A transformer isolates circuits to prevent electrical interference.
A transformer converts electrical energy into heat to manage voltage
levels.
7. If you attempt to measure resistance in a live circuit with an ohmmeter, what
potential hazards could arise?
You could damage the ohmmeter and create a shock hazard.
You would obtain an accurate resistance reading.
, You would improve the circuit's performance.
You would not encounter any issues.
8. In a scenario where a power plant generates electricity at 20,000 volts, which
device would be essential to reduce this voltage for safe distribution to
homes?
Transformer
Circuit breaker
Voltage regulator
Fuse
9. A dry-type transformer uses ___ to dissipate excess heat that is generated by
current passing through the windings.
cores
deflection
air
oil
10. An open circuit can be caused by a(n) __________________
broken wire
lose terminal/wire
blown fuse
All of the above
11. As the gauge number of the wire increases, its current carrying capacity?
Decreases
, Drops to zero ohms
Increases
Remains the same
12. In the field of electricity, AC means
amplitude circuits
alternating current
alternating capacitance
advanced circuits
13. What is the Power in a circuit with current 10 Amps and 9 Volt battery?
13.1Watts
0.9 Watts
90 Watts
14. What is the ampacity of #12 THHN wire according to electrical standards?
25 amps
15 amps
20 amps
30 amps
15. What is the effect on the circuit when a light switch is activated?
The circuit is completed.
The circuit is overloaded.
Guide | Graded A+
1. Which AWG wire is capable of carrying the largest amount of current?
8
10
12
14
2. What is the primary cooling method used in a dry type transformer?
Water
Air
Oil
Gas
3. Describe the characteristics of a Type UF conductor and its typical
applications.
Type UF conductor is only used in residential applications without
moisture exposure.
Type UF conductor is designed for wet locations and is suitable for
underground installations.
Type UF conductor has a rigid structure and is used for high-voltage
applications.
Type UF conductor is primarily used for indoor wiring in dry locations.
4. If an electrician discovers a splice in a buried conduit during an inspection,
what should be their immediate course of action according to NEC
, guidelines?
The electrician should report the violation and recommend
corrective measures to remove the splice.
The electrician should replace the entire conduit system.
The electrician should leave the splice as is if it appears functional.
The electrician should cover the splice with additional insulation.
5. Watt is a What? Oops, sorry... I meant to ask, "What is a Watt?".
A unit of energy.
A unit of power.
That was a terrible joke.
A unit of kinetic energy.
6. Describe how a transformer operates in relation to voltage levels in an
electrical circuit.
A transformer uses mechanical components to adjust voltage levels.
A transformer operates by using electromagnetic induction to
increase or decrease voltage levels in an electrical circuit.
A transformer isolates circuits to prevent electrical interference.
A transformer converts electrical energy into heat to manage voltage
levels.
7. If you attempt to measure resistance in a live circuit with an ohmmeter, what
potential hazards could arise?
You could damage the ohmmeter and create a shock hazard.
You would obtain an accurate resistance reading.
, You would improve the circuit's performance.
You would not encounter any issues.
8. In a scenario where a power plant generates electricity at 20,000 volts, which
device would be essential to reduce this voltage for safe distribution to
homes?
Transformer
Circuit breaker
Voltage regulator
Fuse
9. A dry-type transformer uses ___ to dissipate excess heat that is generated by
current passing through the windings.
cores
deflection
air
oil
10. An open circuit can be caused by a(n) __________________
broken wire
lose terminal/wire
blown fuse
All of the above
11. As the gauge number of the wire increases, its current carrying capacity?
Decreases
, Drops to zero ohms
Increases
Remains the same
12. In the field of electricity, AC means
amplitude circuits
alternating current
alternating capacitance
advanced circuits
13. What is the Power in a circuit with current 10 Amps and 9 Volt battery?
13.1Watts
0.9 Watts
90 Watts
14. What is the ampacity of #12 THHN wire according to electrical standards?
25 amps
15 amps
20 amps
30 amps
15. What is the effect on the circuit when a light switch is activated?
The circuit is completed.
The circuit is overloaded.
