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NCC PRACTICE TEST 1 QUESTIONS AND ANSWERS
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NCC PRACTICE TEST 1 QUESTIONS AND ANSWERS
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NCC PRACTICE TEST 1 QUESTIONS AND ANSWERSReactive power is always __ - Answers -90 degrees out of phase with true power
Before awarding a journeyman certificate, a typical electrical apprenticeship program
requires 8,000 total hours of __ - Answers -on-the-job training
The formula for inductive reactance is __ - Answers -XL=2(pi)fL
According to the power triangle, the apparent power is __ - Answers -greater than the
true power
If the time for one cycle is 0.1 second, the frequency is __ - Answers -10Hz
The minimum ampacity for a feeder supplying ten 30A shore power receptacles in a
marina is __ - Answers -120A
A trainee must demonstrate knowledge of the hands-on tasks learned in each module.
This is referred to as __ - Answers -a competency-based program
The interior lighting load for a school building with a 175,000 sq ft of floor space is ___ -
Answers -525,000VA
Electricians who are responsible for their own taxes and providing their own insurance
are considered ___ - Answers -individual contractors
Air conditioning overcurrent protective devices can never exceed what percentage of
the motor-rated load current or the branch circuit selection current (whichever is
greater)? - Answers -225%
When space heating equipment uses electric resistance heating elements, protection
for the resistance elements must not exceed ___ - Answers -60A
What is the voltage drop for a 120V, single-phase, two-wire branch circuit, 100' long,
using copper conductors of 6530 circular mils with a noncontinuous load of 13A? -
Answers -5.14V (VD=(2xLxKxI)/CM K=12.9)
Electrical licensing requirements are set by _____. - Answers -states or municipalities
Continuous loads are calculated at what percentage of the maximum current rating of
the overcurrent device? - Answers -80%
What is the current flow in a purely resistive AC circuit if the resistance is 15 ohms and
the voltage is 150V? - Answers -10A
, The total voltage in a circuit with voltage drops of 15V, 25V, and 20V is ___ - Answers -
60V
When making service calculations for multi-family dwellings, additional demand factors
must be applied to the portion of the nuetral load greater than ___ - Answers -200A
Each of three equal capacitors in series has ___ - Answers -one-third the applied
voltage
Which of the following describes the standard in NFPA 70E? - Answers -Safe work
practices must be applied when working on or near exposed energized parts
The product of the source voltage and the total current is ___ - Answers -apparent
power
What is the required circuit ampacity of a noncontinuous, single-phase load of 8.5kW at
277V? - Answers -30.69A
In most cases, feeder conductor size is adjusted when ___ - Answers -there are more
than three current-carrying conductors in the raceway
The smallest size locking and grounding type receptacle that may be used to provide
shore power for boats is ___ - Answers -30A
What is the current-carrying capacity for No. 6 THWN aluminum conductors in conduit
run through an ambient temperature of 38 degrees C? - Answers -44A
The self-induced voltage across an inductance is produced by a change in ___ -
Answers -current with the respect to time
Using the VA/linear foot method, the total VA that must be used in a service calculation
for a 50' show window is ___ - Answers -12,500VA (50x200x1.25)
If a store lighting load is 14,000VA (continuous), which of the following must be used for
the circuit calculation? - Answers -17,500VA
For resistance welders, the rating for the overcurrent protection device should not
exceed what percentage of the primary current rating of the welder? - Answers -300%
The power factor can be defined as the ratio of true power to ___ - Answers -apparent
power
When calculating the service requirement for a particular building, the first step is to ___
- Answers -determine the floor area of the building
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