LADWP Electrical Craft Helper Ultimate Exam Prep |
Complete Exam Question Bank with Verified Correct
Answers and Detailed Rationales | Latest Update (New
2026/2027 Edition) - Los Angeles Department of Water
and Power | Already Graded A+
Question 1
When should personal protective equipment be inspected?
A. Before use
B. During use
C. After use
D. If it doesn't work
Answer: A
Rationale: Personal protective equipment should be inspected before use to ensure it is in proper
working condition and will provide adequate protection.
Question 2
How far out from a structure should the base of a portable ladder extended to 20 feet high be
placed?
A. One foot
B. Two feet
C. Five feet
D. Ten feet
Answer: C
Rationale: The base of a ladder should be placed one foot away from the structure for every four
feet of ladder height (4-to-1 rule). For a 20-foot ladder, this equals 5 feet.
Question 3
Which one of the following hand tools has a handle, a shank, and a blade?
A. Pliers
B. Wrench
pg. 1
,C. Hammer
D. Screwdriver
Answer: D
Rationale: A screwdriver consists of a handle, shank, and blade tip. Pliers have jaws, wrenches
have jaws/heads, and hammers have handles and heads.
Question 4
You are working inside a high voltage sub-station installing new equipment. What is the best tool
to verify the dimensions of the high voltage equipment room (125 ft x 75 ft, as stated in the
engineering design)?
A. Metallic measuring tape
B. Wooden folding rule
C. 100-foot cloth measuring tape
D. Pacing
Answer: B
Rationale: A wooden folding rule is safest to use in a high voltage sub-station because it is non-
conductive and will not create electrical hazards.
Question 5
The best tool used to measure 15 feet of wire is a:
A. Slide rule
B. Yard stick
C. Measuring tape
D. Weight scale
Answer: C
Rationale: A measuring tape is the most practical and accurate tool for measuring 15 feet of
wire.
Question 6
The best tool for measuring a very long conduit run is:
A. A measuring wheel
B. A long tape measure
C. A measure pull string tape
D. Experience
pg. 2
, Answer: A
Rationale: A measuring wheel is the most practical and efficient tool for measuring very long
distances such as conduit runs.
Question 7
How many 120-foot lengths of wire can be cut from five 500-foot reels?
A. 16
B. 18
C. 20
D. 22
Answer: C
Rationale: Total wire = 5 × 500 = 2,500 feet. 2,500 ÷ 120 = 20.83. Only 20 full 120-foot lengths
can be cut.
Question 8
To measure the amount of cable that is on a reel, it is most accurate to:
A. Use a folding ruler
B. Use the footage indicator stamped on the cable
C. Use an estimate
D. Count wraps on the reel
Answer: B
Rationale: The footage indicator stamped on the cable is the most accurate way to determine the
amount of cable on a reel.
Question 9
To test a 110-volt lighting circuit is alive, a person should best:
A. Use an ammeter across the line
B. Use a voltmeter across the line
C. Touch each wire in turn to ground through a fused jumper
D. Place an ammeter in series with a fused jumper and connect one leg to ground
Answer: C
Rationale: Testing each wire to ground through a fused jumper is a safe method to verify if a
circuit is live.
pg. 3
Complete Exam Question Bank with Verified Correct
Answers and Detailed Rationales | Latest Update (New
2026/2027 Edition) - Los Angeles Department of Water
and Power | Already Graded A+
Question 1
When should personal protective equipment be inspected?
A. Before use
B. During use
C. After use
D. If it doesn't work
Answer: A
Rationale: Personal protective equipment should be inspected before use to ensure it is in proper
working condition and will provide adequate protection.
Question 2
How far out from a structure should the base of a portable ladder extended to 20 feet high be
placed?
A. One foot
B. Two feet
C. Five feet
D. Ten feet
Answer: C
Rationale: The base of a ladder should be placed one foot away from the structure for every four
feet of ladder height (4-to-1 rule). For a 20-foot ladder, this equals 5 feet.
Question 3
Which one of the following hand tools has a handle, a shank, and a blade?
A. Pliers
B. Wrench
pg. 1
,C. Hammer
D. Screwdriver
Answer: D
Rationale: A screwdriver consists of a handle, shank, and blade tip. Pliers have jaws, wrenches
have jaws/heads, and hammers have handles and heads.
Question 4
You are working inside a high voltage sub-station installing new equipment. What is the best tool
to verify the dimensions of the high voltage equipment room (125 ft x 75 ft, as stated in the
engineering design)?
A. Metallic measuring tape
B. Wooden folding rule
C. 100-foot cloth measuring tape
D. Pacing
Answer: B
Rationale: A wooden folding rule is safest to use in a high voltage sub-station because it is non-
conductive and will not create electrical hazards.
Question 5
The best tool used to measure 15 feet of wire is a:
A. Slide rule
B. Yard stick
C. Measuring tape
D. Weight scale
Answer: C
Rationale: A measuring tape is the most practical and accurate tool for measuring 15 feet of
wire.
Question 6
The best tool for measuring a very long conduit run is:
A. A measuring wheel
B. A long tape measure
C. A measure pull string tape
D. Experience
pg. 2
, Answer: A
Rationale: A measuring wheel is the most practical and efficient tool for measuring very long
distances such as conduit runs.
Question 7
How many 120-foot lengths of wire can be cut from five 500-foot reels?
A. 16
B. 18
C. 20
D. 22
Answer: C
Rationale: Total wire = 5 × 500 = 2,500 feet. 2,500 ÷ 120 = 20.83. Only 20 full 120-foot lengths
can be cut.
Question 8
To measure the amount of cable that is on a reel, it is most accurate to:
A. Use a folding ruler
B. Use the footage indicator stamped on the cable
C. Use an estimate
D. Count wraps on the reel
Answer: B
Rationale: The footage indicator stamped on the cable is the most accurate way to determine the
amount of cable on a reel.
Question 9
To test a 110-volt lighting circuit is alive, a person should best:
A. Use an ammeter across the line
B. Use a voltmeter across the line
C. Touch each wire in turn to ground through a fused jumper
D. Place an ammeter in series with a fused jumper and connect one leg to ground
Answer: C
Rationale: Testing each wire to ground through a fused jumper is a safe method to verify if a
circuit is live.
pg. 3
