Exam (elaborations)
Oklahoma Electrical Practice Tear Exam 2024/2025 Questions With Completed & Verified Solutions.
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Oklahoma Electrical Practice Tear Exam 2024/2025 Questions With Completed & Verified Solutions.
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Oklahoma Electrical Practice TearWiring located within the cavity of a fire rated assembly, but not considered part of the fire rated
assembly is allowed to be... - ANS Supported by independent support wires.
A 24-volt system needs a smallest working depth of... - ANS 3 feet
All of the subsequent are acceptable forms of hearing protection EXCEPT - ANS Cotton
inserted into the ear
If a metal underground water pipe is utilized for grounding, it will have a smallest or how many
feet in contact with the earth? - ANS 10 feet
There are 6 current carrying wires in a conduit. The bonding wire is... - ANS Not counted in the
adjustment fit factor
What's the largest over current protection for a branch circuit that supplies a single non-motor
operated utilization equipment in an occupancy? The utilization rating is 20 amps. - ANS 20
amps
An underwater junction box for a 12-volt lighting system in a swimming pool is connected with a
PVC conduit. It is a flush deck box. To meet the NEC it MUST... - ANS Be filled with a potting
compound
Alternating current means the direction... - ANS Pulses Intermittently
A pool has an underwater speaker system. The PVC conduit runs in to the forming shells must
have copper wire sized at.... - ANS #8 AWG
What's the largest ampacity/breaker size for an aluminum AWG type TW #10? - ANS 25 amp
Breaker
An electromotive force is measured in... - ANS Volts
The ampacity of a 15 foot feeder tap wire that supplies a panel board must be a minimum of... -
ANS 1/3 the ampacity of the feeder.
What will be the smallest space between multiple rods or pipes grounding electrodes? - ANS 6
feet
What's the largest size branch circuit allowed to feed the line side of a transformer for a 30 volt
lighting system? - ANS 25 amps
, A bedroom in a residential unit will have a 15 amp or 20 amp receptacle set in every wall
space.... - ANS 2 feet or more in width.
What's the smallest depth for direct burial cable operating 600v or less in all unspecified
locations? - ANS 24 inches
A single family residence has a net calculation of 22,800 VA. Voltage is 240v single phase. The
feeder load is.... - ANS 95 amps.
One advantage a 24v device has over a 12v device is... - ANS It has a lower current draw
A hospital he a grounding point in a critical care area adjacent to the patient vicinity. What is the
smallest ground wire size allowed? - ANS #10 AWG
Surface mounted fixtures which contain ballasts are to be mounted on a low density cellulose
fiber board ceiling. They MUST be a minimum of how far from the surface of the fiber board? -
ANS 1 & 1/2 inches
What's the largest allowed branch circuit OCP for a 240v, 4500w, 50 gallon water heater? - ANS
25 amps
What color is utilized to mark the wire having the higher voltage to ground for a switch board or
panel board supplied from a 3-phase, 4 wire delta system? - ANS Orange
Metal conduits entering service equipment enclosures with concentric or eccentric knock outs
containing service wires will have... - ANS Bonding bushings and jumpers
What's the voltage to ground on the "A" phase of a 240v, 3 phase, 4 wire system? - ANS 120
volts
A 2" conduit enters the east side of a pull box and exits on the west side of the same box. The
smallest space from the east wall to the west wall of the pull box is how many inches? - ANS 16
inches
Other than class II conductors, lighting systems operating at 24v will have their transformer
secondary current limited to a largest of... - ANS 25 amps
A transformer has a 75 kva rating and is 460v, 3 phase with an efficiency of 90°. What is the
ampacity necessary for the primary wire? - ANS 104.6 amps (75kva/(460*1.72*90))
A jewelry store has two 15' show windows, one on either sides of the entrance way. What's the
smallest number of receptacles necessary to service these windows? - ANS 2 per window.
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