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IEC YEAR 1 FINAL EXAM NEWEST 2024 -2025 ACTUAL
EXAM COMPLETE 200 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+
How many kW does a 100-ampere residential service draw when fully loaded?
a.10 kW b.240 kW c.100 kW d.24 kW - ANSWER- d. 24kW
100A x 240V = 24,000 W OR 24kW
If a 95-watt lamp operates for 11 hours, the utility will bill for ___ kWh.
a.8.636 b.10.450 c.11.579 d.1.045 e.1.158 - ANSWER- d. 1.045 1 / 4
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95W x 11hrs = 1045-watt-hours 1045/1000 = 1.045 kWh
What is the monthly energy cost to operate a 200-watt high-pressure sodium lamp? Electricity costs $0.11 per kW-hr and the lamp will be ON for 12 hours per day. There are 30 days in a billing month.
a.$7.92 b.$8.80 c.$15.94 d.$6.60 e.$660 - ANSWER- a. $7.92
200W x 12hrs x 30 days = 72,000 72,000/1000 = 72kWh 0.11 x 72kWh = $7.92
To minimize conductor insulation damage and arcing damage to electrical equipment during a ground fault or a short circuit, ___ should be minimized.
a.time duration of the fault b.ampere level of the fault current 2 / 4
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c.both a and b d.neither a nor b - ANSWER- a. time duration of the fault
Self-tapping sheet metal screws (TEK screws) ___ permitted to be used to connect the equipment grounding conductor to a metal box. - ANSWER- Are Not
According to Article 250, a metal underground water pipe that is in direct contact with the earth for 10 ft. or more (including any metal well casing effectively bonded to the pipe) and electrically continuous (or made electrically continuous by bonding around insulating joints or insulating pipe) to the points of connection of the grounding electrode conductor and the bonding conductors would be a good ___.
a.insulator b.service conductor c.grounding electrode d.neutral - ANSWER- c. grounding electrode
If connected to a metal water piping system, the grounding electrode conductor shall be connected at some point within the first ___ of where it enters the building.
a.25 ft (7.5 m) b.10 ft (3.0 m) c.5 ft (1.52 m) - ANSWER- c. 5 ft (1.52 m) 3 / 4
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When determining the minimum size of a grounding electrode conductor, Table ___ is used.
a.250.122 b.310.15(B)(16) c.250.66 d.314.16(A) e.none of these - ANSWER- c. 250.66
The grounding blade on an attachment plug is ___ than the current- carrying conductor blades. This is to ensure that the grounding connection is made before the current-carrying conductor connections and breaks its connection after the current-carrying conductor connections (first make-last break).
a.more durable b.longer c.larger d.tarnish-resistant - ANSWER- b. longer
An equipment grounding conductor (EGC) is the conductor that is ___.
a.installed with the branch-circuit conductors in a conduit or cable run
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