,LADWP ELECTRICAL CRAFT HELPER (ECH) EXAM — COMPLETE PRACTICE TEST BANK (2026)
SECTION 1: EXAM OVERVIEW & KEY DOMAINS
Question 1
What is the primary purpose of the LADWP Electrical Craft Helper (ECH) examination?
A) To certify candidates as licensed electricians
B) To assess foundational knowledge, practical skills, and decision-making abilities for entry-level
electrical support roles
C) To qualify candidates for supervisory electrical positions
D) To test knowledge of advanced electrical engineering principles
Correct Answer: B
Rationale: The ECH examination is designed to assess the foundational knowledge, practical skills, and
critical decision-making abilities required of an entry-level Electrical Helper. It is not for supervisory or
engineering positions.
Question 2
Which of the following is a core domain tested on the LADWP Electrical Craft Helper exam?
A) Advanced calculus
B) Lockout/Tagout (LOTO) and Hazard Communication
C) Medical terminology
D) Software programming
Correct Answer: B
Rationale: Key domains include Electrical Fundamentals, Hand & Power Tools, Workplace Safety & PPE,
Lockout/Tagout (LOTO), Mechanical Aptitude, Mathematics, and Utility Operations.
Question 3
What is the class code for the Electrical Craft Helper position?
A) 3851
B) 3799
C) 3863
D) 3879
Correct Answer: B – 3799
Rationale: The Electrical Craft Helper position is designated as Class Code 3799. Class 3851 is Utility
Electrical Craft Helper, and Class 3863 is Electrician.
,Question 4
What is the minimum educational requirement for the Electrical Craft Helper position?
A) Associate's degree
B) High school diploma (desired but not required)
C) Bachelor's degree
D) No education requirement
Correct Answer: B
Rationale: Graduation from high school is desired but not required for the Electrical Craft Helper
position.
Question 5
What is the annual salary range for Electrical Craft Helper (3799)?
A) $50,000 – $65,000
B) $73,267 – $99,472
C) $100,000 – $120,000
D) $60,000 – $75,000
Correct Answer: B – $73,267 – $99,472
Rationale: The current annual salary range for Electrical Craft Helper 3799 is $73,267 – $99,472.
SECTION 2: ELECTRICAL FUNDAMENTALS & OHM'S LAW
Question 6
What is the unit of electric resistance?
A) Volt
B) Ampere
C) Ohm
D) Watt
Correct Answer: 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.
Question 7
Which material is the best conductor of electricity?
, A) Aluminum
B) Copper
C) Steel
D) PVC
Correct Answer: 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 standard material for electrical wiring.
Question 8
A circuit has a resistance of 12 ohms and is supplied by 120 volts. What is the current flow?
A) 5A
B) 8A
C) 10A
D) 14A
Correct Answer: C – 10A
Rationale: Ohm's Law states I = V ÷ R. Therefore, 120V ÷ 12Ω = 10 amperes.
Question 9
Two 10-ohm resistors are connected in parallel. What is the total resistance?
A) 5 ohms
B) 10 ohms
C) 15 ohms
D) 20 ohms
Correct Answer: A – 5 ohms
Rationale: Parallel resistance is calculated as RT = 1 / (1/R₁ + 1/R₂). Therefore, RT = 1 / (1/10 + 1/10) = 5
ohms.
Question 10
A 240-volt circuit supplies a 20-amp load. What is the power consumed?
A) 1,200 W
B) 2,400 W
C) 4,800 W
D) 6,000 W
Correct Answer: C – 4,800 W
SECTION 1: EXAM OVERVIEW & KEY DOMAINS
Question 1
What is the primary purpose of the LADWP Electrical Craft Helper (ECH) examination?
A) To certify candidates as licensed electricians
B) To assess foundational knowledge, practical skills, and decision-making abilities for entry-level
electrical support roles
C) To qualify candidates for supervisory electrical positions
D) To test knowledge of advanced electrical engineering principles
Correct Answer: B
Rationale: The ECH examination is designed to assess the foundational knowledge, practical skills, and
critical decision-making abilities required of an entry-level Electrical Helper. It is not for supervisory or
engineering positions.
Question 2
Which of the following is a core domain tested on the LADWP Electrical Craft Helper exam?
A) Advanced calculus
B) Lockout/Tagout (LOTO) and Hazard Communication
C) Medical terminology
D) Software programming
Correct Answer: B
Rationale: Key domains include Electrical Fundamentals, Hand & Power Tools, Workplace Safety & PPE,
Lockout/Tagout (LOTO), Mechanical Aptitude, Mathematics, and Utility Operations.
Question 3
What is the class code for the Electrical Craft Helper position?
A) 3851
B) 3799
C) 3863
D) 3879
Correct Answer: B – 3799
Rationale: The Electrical Craft Helper position is designated as Class Code 3799. Class 3851 is Utility
Electrical Craft Helper, and Class 3863 is Electrician.
,Question 4
What is the minimum educational requirement for the Electrical Craft Helper position?
A) Associate's degree
B) High school diploma (desired but not required)
C) Bachelor's degree
D) No education requirement
Correct Answer: B
Rationale: Graduation from high school is desired but not required for the Electrical Craft Helper
position.
Question 5
What is the annual salary range for Electrical Craft Helper (3799)?
A) $50,000 – $65,000
B) $73,267 – $99,472
C) $100,000 – $120,000
D) $60,000 – $75,000
Correct Answer: B – $73,267 – $99,472
Rationale: The current annual salary range for Electrical Craft Helper 3799 is $73,267 – $99,472.
SECTION 2: ELECTRICAL FUNDAMENTALS & OHM'S LAW
Question 6
What is the unit of electric resistance?
A) Volt
B) Ampere
C) Ohm
D) Watt
Correct Answer: 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.
Question 7
Which material is the best conductor of electricity?
, A) Aluminum
B) Copper
C) Steel
D) PVC
Correct Answer: 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 standard material for electrical wiring.
Question 8
A circuit has a resistance of 12 ohms and is supplied by 120 volts. What is the current flow?
A) 5A
B) 8A
C) 10A
D) 14A
Correct Answer: C – 10A
Rationale: Ohm's Law states I = V ÷ R. Therefore, 120V ÷ 12Ω = 10 amperes.
Question 9
Two 10-ohm resistors are connected in parallel. What is the total resistance?
A) 5 ohms
B) 10 ohms
C) 15 ohms
D) 20 ohms
Correct Answer: A – 5 ohms
Rationale: Parallel resistance is calculated as RT = 1 / (1/R₁ + 1/R₂). Therefore, RT = 1 / (1/10 + 1/10) = 5
ohms.
Question 10
A 240-volt circuit supplies a 20-amp load. What is the power consumed?
A) 1,200 W
B) 2,400 W
C) 4,800 W
D) 6,000 W
Correct Answer: C – 4,800 W
