101 Basic Series - Module 03 - Post Assessment
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1
Electric codes usually carry ______________ compliance, such as those from the NEC.
Voluntary
Suggested
Mandatory
Cautious
2
The maximum short circuit current that an overcurrent protective device can safely interrupt is known as its interrupting rating.
True
False
3
Which overcurrent condition usually has the smallest magnitude of current?
Overload
Short Circuit
Ground Fault
All of them have a small magnitude
None of them have a small magnitude
4
This electrical distribution system is used for commercial buildings and shopping centers where it is necessary to minimize interruptions.
Radial System
Loop System
Network System
5
The ________ distribution system is the most expensive, but provides the most reliable service in terms of continuity.
Radial System
Loop System
Network System
6
________ are the result of placing excessive loads on the circuit beyond the level the circuit was designed to handle safely.
Overloads
Short Circuits
Ground Faults
None of the above
7
Utility companies can use smaller cables for distribution because when voltage is increased, current is ___________.
Increased
Decreased
Stays the Same
8
An electrical distribution system that has one power source for a group of customers is a ________ distribution system. A circuit failure in the system causes a power interruption for all in the system.
Radial System
Loop System
Network system
9
A piece of equipment meeting one set of standards automatically meets other standards since they are all so similar.
True
False
10
IEC stands for ________?
Industrial Electromechanical Commission
International Electricity Commission
International Electrotechnical Commission
Industrial Electrotechnical Corporation
11
A graphical representation of an electrical distribution system is called a ________.
Single-phase diagram
Three-phase diagram
One-line diagram
Schematic Diagram
12
The ________ steps down the voltage to useful voltages to be delivered to homes and facilities that it supplies.
Generating station
Transmission substation
Station Switchyard
Subtransmission Station
Distribution Substation
13
The type of system coordination in which all circuit breakers are rated to operate independently is ________.
Series rated
Fully rated
Selectively coordinated
None of the above
14
This illustration shows which power system?
Single-phase
Three-phase
Neither
15
If equipment meets certain safety standards set forth by Underwriter's Laboratory, the equipment becomes _____________.
NEC Certified
ANSI Listed
IS09000 Certified
UL Listed
16
If the branch circuits supply motor loads, fully rated or selectively coordinated systems should not be used.
True
False
17
In a three-phase system, each phase is ________ degrees apart.
100
120
150
180
18
Single-phase, three-wire has two hot wires and one neutral wire and can supply both 120V and 240V.
True
False
19
The selectively coordinated system is the most costly of the three basic systems of coordination.
True
False
20
A one-line diagram can show a simple DC circuit, but it cannot show a complex 3-phase system.
True
False
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