LADWP ELECTRICAL CRAFT HELPER – ELECTRICAL FUNDAMENTALS EXAM– QUESTIONS AND ANSWERS |
VERIFIED AND WELL DETAILED ANSWERS | PLUS RATIONALES | DOWNLOAD AND PASS | LATEST EXAM UPDATE
2026/2027
Core Domains
1. Basic Electrical Theory (Ohm’s Law, Power, Energy)
2. DC Circuits (Series, Parallel, Series-Parallel)
3. AC Theory (Phase, Frequency, Transformers)
4. Electrical Measurements and Test Equipment
5. Electrical Safety and Personal Protective Equipment (PPE)
6. National Electrical Code (NEC) Overview and Applications
7. Electrical Wiring and Distribution Systems
8. Motors, Controls, and Basic Power Transmission
9. Grounding, Bonding, and Overcurrent Protection
10. Workplace Ethics, Communication, and Professional Standards
Introduction
This comprehensive examination is designed to rigorously assess the foundational knowledge and practical skills
required of an Electrical Craft Helper. The test covers essential topics including electrical theory, circuit analysis, safety
,protocols, and applicable codes. You will encounter a mix of direct knowledge-based questions and complex, scenario-
based problems that demand critical thinking and the application of learned principles to real-world situations.
Emphasis is placed on your ability to make safe, efficient, and code-compliant decisions. Prepare to demonstrate a deep
understanding of electrical fundamentals and a commitment to professional standards. This assessment serves as a key
tool to verify your readiness for the responsibilities of the role.
SECTION ONE: QUESTIONS 1 – 50
Question 1
What is the fundamental unit of electrical current, defined as the flow of one coulomb of charge per second?
A. Volt
B. Ampere
C. Ohm
D. Watt
🟢 Correct Answer: B. Ampere
🔴 Explanation: The ampere (A) is the SI base unit of electric current. It is defined by the flow of one coulomb of
charge per second, representing the quantity of electrons moving past a specific point in a circuit.
Question 2
Which of the following materials would be considered the BEST conductor of electricity?
,A. Silicon
B. Copper
C. Rubber
D. Glass
🟢 Correct Answer: B. Copper
🔴 Explanation: Copper is a highly conductive metal with low resistance, making it the standard material for
electrical wiring. Silicon is a semiconductor, while rubber and glass are excellent insulators.
Question 3
Ohm's Law defines the relationship between voltage (V), current (I), and resistance (R). Which formula correctly
expresses this law?
A. V = I / R
B. V = I * R
C. V = R / I
D. V = I + R
🟢 Correct Answer: B. V = I * R
🔴 Explanation: Ohm's Law states that the voltage across a conductor is directly proportional to the current flowing
through it, provided the temperature remains constant. The correct formula is Voltage = Current × Resistance.
, Question 4
What is the total resistance of a series circuit consisting of three resistors with values of 10Ω, 15Ω, and 25Ω?
A. 20Ω
B. 30Ω
C. 40Ω
D. 50Ω
🟢 Correct Answer: D. 50Ω
🔴 Explanation: In a series circuit, total resistance is calculated by summing all individual resistances: R_total = R1 +
R2 + R3 = 10Ω + 15Ω + 25Ω = 50Ω.
Question 5
In a parallel circuit, what characteristic of the voltage is the same across all branches?
A. The voltage is divided among the branches
B. The voltage is the same across each branch
C. The voltage is the sum of the individual branch voltages
D. The voltage varies depending on the resistance of the branch
🟢 Correct Answer: B. The voltage is the same across each branch
VERIFIED AND WELL DETAILED ANSWERS | PLUS RATIONALES | DOWNLOAD AND PASS | LATEST EXAM UPDATE
2026/2027
Core Domains
1. Basic Electrical Theory (Ohm’s Law, Power, Energy)
2. DC Circuits (Series, Parallel, Series-Parallel)
3. AC Theory (Phase, Frequency, Transformers)
4. Electrical Measurements and Test Equipment
5. Electrical Safety and Personal Protective Equipment (PPE)
6. National Electrical Code (NEC) Overview and Applications
7. Electrical Wiring and Distribution Systems
8. Motors, Controls, and Basic Power Transmission
9. Grounding, Bonding, and Overcurrent Protection
10. Workplace Ethics, Communication, and Professional Standards
Introduction
This comprehensive examination is designed to rigorously assess the foundational knowledge and practical skills
required of an Electrical Craft Helper. The test covers essential topics including electrical theory, circuit analysis, safety
,protocols, and applicable codes. You will encounter a mix of direct knowledge-based questions and complex, scenario-
based problems that demand critical thinking and the application of learned principles to real-world situations.
Emphasis is placed on your ability to make safe, efficient, and code-compliant decisions. Prepare to demonstrate a deep
understanding of electrical fundamentals and a commitment to professional standards. This assessment serves as a key
tool to verify your readiness for the responsibilities of the role.
SECTION ONE: QUESTIONS 1 – 50
Question 1
What is the fundamental unit of electrical current, defined as the flow of one coulomb of charge per second?
A. Volt
B. Ampere
C. Ohm
D. Watt
🟢 Correct Answer: B. Ampere
🔴 Explanation: The ampere (A) is the SI base unit of electric current. It is defined by the flow of one coulomb of
charge per second, representing the quantity of electrons moving past a specific point in a circuit.
Question 2
Which of the following materials would be considered the BEST conductor of electricity?
,A. Silicon
B. Copper
C. Rubber
D. Glass
🟢 Correct Answer: B. Copper
🔴 Explanation: Copper is a highly conductive metal with low resistance, making it the standard material for
electrical wiring. Silicon is a semiconductor, while rubber and glass are excellent insulators.
Question 3
Ohm's Law defines the relationship between voltage (V), current (I), and resistance (R). Which formula correctly
expresses this law?
A. V = I / R
B. V = I * R
C. V = R / I
D. V = I + R
🟢 Correct Answer: B. V = I * R
🔴 Explanation: Ohm's Law states that the voltage across a conductor is directly proportional to the current flowing
through it, provided the temperature remains constant. The correct formula is Voltage = Current × Resistance.
, Question 4
What is the total resistance of a series circuit consisting of three resistors with values of 10Ω, 15Ω, and 25Ω?
A. 20Ω
B. 30Ω
C. 40Ω
D. 50Ω
🟢 Correct Answer: D. 50Ω
🔴 Explanation: In a series circuit, total resistance is calculated by summing all individual resistances: R_total = R1 +
R2 + R3 = 10Ω + 15Ω + 25Ω = 50Ω.
Question 5
In a parallel circuit, what characteristic of the voltage is the same across all branches?
A. The voltage is divided among the branches
B. The voltage is the same across each branch
C. The voltage is the sum of the individual branch voltages
D. The voltage varies depending on the resistance of the branch
🟢 Correct Answer: B. The voltage is the same across each branch
