Exam (elaborations)
EVITP Electrical 3 Test 5 Questions and Answers 100% Correct
- Course
- Institution
EVITP Electrical 3 Test 5 Questions and Answers 100% Correct
[Show more]
Content preview
EVITP Electrical 3 Test 5 Questions andAnswers 100% Correct
Types of fault current include overloads, short circuits, ground faults, and -
ANSWER arc faults
Overcurrent protection is covered in - ANSWER NEC Article 240
One of the first signs of worn motor bearings is most likely to be a(n) -
ANSWER Continuous overloads
Equipment intended to interrupt current at fault levels must have an interrupting
rating at nominal circuit voltage that is ____ - ANSWER equal to the current
available at the line terminals of the equipment
For 480V circuits, the arc current seldom exceeds _____. - ANSWER 60% of the
available bolted fault current
A conductor with failed insulation contacts the metal edge of a grounded metal
wire way. This is known as a - ANSWER Ground fault
The voltage rating of a fuse - ANSWER can be higher than the circuit voltage
but never lower
The type of fuse used to prevent nuisance tripping from temporary motor
overloads and surge currents is a - ANSWER Dual element time delay fuse
, UL Class R fuses have a short circuit interrupting rating of up to ____. -
ANSWER 200,000A
Which of the following is within the basic scope of Underwriters Laboratories -
ANSWER safety
A device that is designed to withstand numerous trip and reset cycles without
replacement and can be thermal, magnetic, or solid-state is an - ANSWER
Overload relays
Which of the following is true with regard to circuit breakers - ANSWER Under
normal conditions, the current flow bypasses the spring and latching mechanism.
500A circuit breaker has a frame size of - ANSWER 1000A
What is the frame size of a 30A circuit breaker - ANSWER 100A
Circuit breakers are classified by - ANSWER the largest ampere rating of its
range
Which of the following is true with regard to circuit breaker interrupting capacity
ratings - ANSWER UL tests now include NEMA ratings
If a 120V feeder for nonmotor loads feeds a continuous load rated at 20A and a
noncontinuous load at 25A, what size overcurrent protective device should be
selected? - ANSWER 50A
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 StudySet. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
73091 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now