Exam (elaborations)
NCC PRACTICE TEST 1 QUESTIONS AND ANSWERS
- Course
- Institution
NCC PRACTICE TEST 1 QUESTIONS AND ANSWERS
[Show more]
Content preview
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
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller GEEKA. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79271 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now