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ELECTRICAL CDC 3E051A VOL.3 EXAM
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ELECTRICAL CDC 3E051A VOL.3 EXAM ...
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ELECTRICAL CDC 3E051A VOL.3 EXAM2024-2025
How many conductors are required for a 3-phase-wye service entrance used for
power and lighting? - ANSWER Three ungrounded and one grounded neutral
conductors.
All of the following are important when paralleling conductors except what? -
ANSWER Phase and neutrals must be separated.
How many current-carrying conductors can be installed in the raceway before the
current capacity of the conductors must be de-rated? - ANSWER Three.
To determine the total calculated load of a sub-panel, you should add all the
amperages of the branch circuits plus what percent of the amperage of the largest
motor? - ANSWER 25
The code letter on a motor data plate identifies. - ANSWER The locked-rotor
current draw.
Heavy-duty lamp-holder outlets are calculated at? - ANSWER 600 volt-amperes.
What is the general lighting load of an office building with 1,600 square feet of
living area? - ANSWER 5,600 watts.
The normal color code for wiring a device is? - ANSWER Black to gold terminal,
white to silver.
The simplest form of electrical diagrams is the. - ANSWER Block diagram.
Which part of a set of blueprints indicates the route of the service entrance? -
ANSWER Plot plan.
What does the label TR signify for duplex receptacles? - ANSWER Tamper
, resistant.
Which ratings are always found on switches? - ANSWER Amperes and volts.
Which condition below is not allowed? - ANSWER using flexible metal tubing in
lengths greater than 6 feet.
When you are connecting rigid conduit to boxes what is/are required for circuits
above 250 volts? - ANSWER Two locknuts and bushing.
What is the purpose of a raised box cover? - ANSWER Provides added interior
space as well as a cover for the box.
Pre-punched disks in a box that can be removed easily to permit conduit or cable
connectors to be installed are called? - ANSWER Knockouts.
What is the Kcmil size range for conductors is? - ANSWER 250 to 2,000.
What is the largest American standard wire gauge (AWG) size electrical wire? -
ANSWER 4/0.
How do you know when a bit is properly tightened in a cordless drill? - ANSWER
You will hear a clicking sound.
What conduit bender is normally used for 1/2 and 3/4 EMTs? - ANSWER One-shot
bender.
How is a hacksaw blade installed? - ANSWER Teeth facing away from handle.
What tool should you use to cut openings when installing devices in finished walls?
- ANSWER Jab saw.
When using an adjustable wrench, why do you not apply a pulling force to the
adjustable jaw? - ANSWER The wrench is likely to slip.
Which measurements determine the length of a screwdriver? - ANSWER Length of
the shank.
How may conductors must a clamp-on ampmeter encircle to obtain an accurate
current reading? - ANSWER One.
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