LADWP ELECTRICAL CRAFT HELPER EXAM CLASS-3799
WITH ACTUAL QUESTIONS AND VERIFIED ANSWERS, PLUS
EXPLAINED RATIONALES/EXPERT VERIFIED FOR
GUARANTEED 100% PASS 2026/LATEST UPDATE/INSTANT
DOWNLOAD PDF
CORE DOMAINS
• Electrical Fundamentals and Ohm's Law
• Alternating Current (AC) and Direct Current (DC) Theory
• Hand Tools and Power Tools
• Testing Equipment and Measurements
• National Electrical Code (NEC) Basics
• Workplace Safety, PPE, and Lockout/Tagout
• Mechanical Aptitude and Simple Machines
• Mathematics and Calculations
• Rigging, Knots, and Hitches
• Construction Practices and Distribution Systems
INTRODUCTION
This comprehensive assessment evaluates the candidate's mastery of
foundational electrical knowledge, practical trade skills, and safety
protocols required for the LADWP Electrical Craft Helper (Class 3799)
position. It measures competency in electrical theory, tool identification,
testing equipment, NEC compliance, and workplace safety. The exam
employs multiple-choice and scenario-based questions that test real-
world application, critical decision-making, and adherence to OSHA and
LADWP standards. Candidates must demonstrate the ability to apply
basic electrical principles, select appropriate tools, recognize hazards,
,and perform accurate calculations. This evaluation ensures successful
participants possess the entry-level technical expertise and safety-
focused judgment necessary to assist journey-level electrical workers in
construction, maintenance, and power distribution operations .
SECTION ONE: QUESTIONS 1–100
1. What is the unit of measurement for electrical resistance?
A. Volt
B. Ampere
C. Ohm
D. Watt
C. Ohm
RATIONALE: Resistance is measured in ohms (Ω), as defined by
Ohm's Law (V = I × R). A volt measures electrical pressure, an ampere
measures current flow, and a watt measures power .
2. Which material is the best conductor of electricity among
common wiring materials?
A. Aluminum
B. Copper
C. Steel
D. PVC
B. Copper
RATIONALE: Copper has the highest conductivity among common
wiring materials, surpassing aluminum and far exceeding non-
conductors like steel or PVC. Copper is the industry standard for
,electrical conductors due to its excellent conductivity, corrosion
resistance, and workability .
3. According to Ohm's Law, if voltage is 120 V and resistance is 20
Ω, what is the current?
A. 2 A
B. 4 A
C. 6 A
D. 20 A
C. 6 A
RATIONALE: Ohm's Law states I = V / R. Therefore, 120 ÷ 20 = 6
amperes .
4. What is the standard frequency of alternating current (AC)
power supplied in the United States?
A. 25 Hz
B. 50 Hz
C. 60 Hz
D. 100 Hz
C. 60 Hz
RATIONALE: The standard AC frequency in North America is 60
cycles per second (60 Hz) .
5. What is the total resistance of two 10-ohm resistors connected in
series?
, A. 5 ohms
B. 10 ohms
C. 20 ohms
D. 100 ohms
C. 20 ohms
RATIONALE: In a series circuit, total resistance is the sum of
individual resistances: R_total = R₁ + R₂ = 10 + 10 = 20 ohms. Series
resistance adds directly .
6. What is the total resistance of two 10-ohm resistors connected in
parallel?
A. 5 ohms
B. 10 ohms
C. 20 ohms
D. 100 ohms
A. 5 ohms
RATIONALE: In a parallel circuit, the reciprocal of total resistance
equals the sum of the reciprocals of individual resistances: 1/R_total =
1/R₁ + 1/R₂ = 1/10 + 1/10 = 2/10, so R_total = 5 ohms. Parallel
resistance is less than the smallest individual resistance .
7. What is the power rating in watts of a circuit that draws 5 amps
at 120 volts?
A. 24 watts
B. 60 watts
C. 600 watts
D. 1200 watts
WITH ACTUAL QUESTIONS AND VERIFIED ANSWERS, PLUS
EXPLAINED RATIONALES/EXPERT VERIFIED FOR
GUARANTEED 100% PASS 2026/LATEST UPDATE/INSTANT
DOWNLOAD PDF
CORE DOMAINS
• Electrical Fundamentals and Ohm's Law
• Alternating Current (AC) and Direct Current (DC) Theory
• Hand Tools and Power Tools
• Testing Equipment and Measurements
• National Electrical Code (NEC) Basics
• Workplace Safety, PPE, and Lockout/Tagout
• Mechanical Aptitude and Simple Machines
• Mathematics and Calculations
• Rigging, Knots, and Hitches
• Construction Practices and Distribution Systems
INTRODUCTION
This comprehensive assessment evaluates the candidate's mastery of
foundational electrical knowledge, practical trade skills, and safety
protocols required for the LADWP Electrical Craft Helper (Class 3799)
position. It measures competency in electrical theory, tool identification,
testing equipment, NEC compliance, and workplace safety. The exam
employs multiple-choice and scenario-based questions that test real-
world application, critical decision-making, and adherence to OSHA and
LADWP standards. Candidates must demonstrate the ability to apply
basic electrical principles, select appropriate tools, recognize hazards,
,and perform accurate calculations. This evaluation ensures successful
participants possess the entry-level technical expertise and safety-
focused judgment necessary to assist journey-level electrical workers in
construction, maintenance, and power distribution operations .
SECTION ONE: QUESTIONS 1–100
1. What is the unit of measurement for electrical resistance?
A. Volt
B. Ampere
C. Ohm
D. Watt
C. Ohm
RATIONALE: Resistance is measured in ohms (Ω), as defined by
Ohm's Law (V = I × R). A volt measures electrical pressure, an ampere
measures current flow, and a watt measures power .
2. Which material is the best conductor of electricity among
common wiring materials?
A. Aluminum
B. Copper
C. Steel
D. PVC
B. Copper
RATIONALE: Copper has the highest conductivity among common
wiring materials, surpassing aluminum and far exceeding non-
conductors like steel or PVC. Copper is the industry standard for
,electrical conductors due to its excellent conductivity, corrosion
resistance, and workability .
3. According to Ohm's Law, if voltage is 120 V and resistance is 20
Ω, what is the current?
A. 2 A
B. 4 A
C. 6 A
D. 20 A
C. 6 A
RATIONALE: Ohm's Law states I = V / R. Therefore, 120 ÷ 20 = 6
amperes .
4. What is the standard frequency of alternating current (AC)
power supplied in the United States?
A. 25 Hz
B. 50 Hz
C. 60 Hz
D. 100 Hz
C. 60 Hz
RATIONALE: The standard AC frequency in North America is 60
cycles per second (60 Hz) .
5. What is the total resistance of two 10-ohm resistors connected in
series?
, A. 5 ohms
B. 10 ohms
C. 20 ohms
D. 100 ohms
C. 20 ohms
RATIONALE: In a series circuit, total resistance is the sum of
individual resistances: R_total = R₁ + R₂ = 10 + 10 = 20 ohms. Series
resistance adds directly .
6. What is the total resistance of two 10-ohm resistors connected in
parallel?
A. 5 ohms
B. 10 ohms
C. 20 ohms
D. 100 ohms
A. 5 ohms
RATIONALE: In a parallel circuit, the reciprocal of total resistance
equals the sum of the reciprocals of individual resistances: 1/R_total =
1/R₁ + 1/R₂ = 1/10 + 1/10 = 2/10, so R_total = 5 ohms. Parallel
resistance is less than the smallest individual resistance .
7. What is the power rating in watts of a circuit that draws 5 amps
at 120 volts?
A. 24 watts
B. 60 watts
C. 600 watts
D. 1200 watts
