LADWP Electrical Craft Helper 2026 Practice Test:
Fundamentals, Safety, Tools, Math, and Work Situations
Comprehensive Resource To Help You Ace 2026-2027
Exams Includes Frequently Tested Questions With
ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
1. What is the primary purpose of grounding an electrical system? -
Correct Answer: Provide a path for fault current and help protect people
and equipment
2. Which instrument is normally used to measure resistance? - Correct
Answer: Ohmmeter
3. Before measuring resistance with an ohmmeter, the circuit should generally
be? - Correct Answer: De-energized and isolated as appropriate
4. Ohm's Law can be written as? - Correct Answer: V = I × R
5. A 120-volt load has a resistance of 20 ohms. Approximately how much
current flows? - Correct Answer: 6 A
6. Electrical power in a resistive circuit can be calculated using? - Correct
Answer: P = V × I
,7. A circuit breaker is primarily designed to? - Correct Answer: Interrupt
current during overcurrent conditions
8. In a three-phase, four-wire system, the fourth conductor is normally the? -
Correct Answer: Neutral
9. What does AC stand for? - Correct Answer: Alternating Current
10.What does DC stand for? - Correct Answer: Direct Current
11.A transformer is commonly used to? - Correct Answer: Change AC
voltage levels
12.A fuse protects a circuit by? - Correct Answer: Opening the circuit when
excessive current causes the fusible element to operate
13.Which material is commonly used as an electrical conductor? - Correct
Answer: Copper
14.Which material is normally an electrical insulator? - Correct Answer:
Rubber
15.A voltmeter is connected primarily to measure? - Correct Answer:
Voltage difference
, 16.An ammeter is used to measure? - Correct Answer: Current
17.A continuity test is used to determine whether? - Correct Answer: A
path for current exists between test points
18.In a series circuit, the current through the series components is? -
Correct Answer: The same through each component
19.In a parallel circuit, each branch is connected across the same? - Correct
Answer: Voltage source
20.If resistance increases while voltage remains constant, current will
generally? - Correct Answer: Decrease
21.What is the main purpose of insulation on a conductor? - Correct
Answer: Separate the conductor electrically from unintended contact
22.A short circuit generally creates? - Correct Answer: An unintended low-
resistance path that can produce excessive current
23.Voltage drop in a conductor generally increases when? - Correct
Answer: Conductor length/current increase or conductor resistance is
higher
Fundamentals, Safety, Tools, Math, and Work Situations
Comprehensive Resource To Help You Ace 2026-2027
Exams Includes Frequently Tested Questions With
ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
1. What is the primary purpose of grounding an electrical system? -
Correct Answer: Provide a path for fault current and help protect people
and equipment
2. Which instrument is normally used to measure resistance? - Correct
Answer: Ohmmeter
3. Before measuring resistance with an ohmmeter, the circuit should generally
be? - Correct Answer: De-energized and isolated as appropriate
4. Ohm's Law can be written as? - Correct Answer: V = I × R
5. A 120-volt load has a resistance of 20 ohms. Approximately how much
current flows? - Correct Answer: 6 A
6. Electrical power in a resistive circuit can be calculated using? - Correct
Answer: P = V × I
,7. A circuit breaker is primarily designed to? - Correct Answer: Interrupt
current during overcurrent conditions
8. In a three-phase, four-wire system, the fourth conductor is normally the? -
Correct Answer: Neutral
9. What does AC stand for? - Correct Answer: Alternating Current
10.What does DC stand for? - Correct Answer: Direct Current
11.A transformer is commonly used to? - Correct Answer: Change AC
voltage levels
12.A fuse protects a circuit by? - Correct Answer: Opening the circuit when
excessive current causes the fusible element to operate
13.Which material is commonly used as an electrical conductor? - Correct
Answer: Copper
14.Which material is normally an electrical insulator? - Correct Answer:
Rubber
15.A voltmeter is connected primarily to measure? - Correct Answer:
Voltage difference
, 16.An ammeter is used to measure? - Correct Answer: Current
17.A continuity test is used to determine whether? - Correct Answer: A
path for current exists between test points
18.In a series circuit, the current through the series components is? -
Correct Answer: The same through each component
19.In a parallel circuit, each branch is connected across the same? - Correct
Answer: Voltage source
20.If resistance increases while voltage remains constant, current will
generally? - Correct Answer: Decrease
21.What is the main purpose of insulation on a conductor? - Correct
Answer: Separate the conductor electrically from unintended contact
22.A short circuit generally creates? - Correct Answer: An unintended low-
resistance path that can produce excessive current
23.Voltage drop in a conductor generally increases when? - Correct
Answer: Conductor length/current increase or conductor resistance is
higher
