ASSIGNMENT 2
Textbook Assignment: “Construction Methods and Materials: Electrical and Mechanical
Systems,” chapter 2, pages 2-1 through 2-22.
Learning Objective: Describe
electrical power systems and
equipment.
2-1.
2-2.
2-3.
2-4.
2-5.
Which of the following items are
NOT part of a power transmission
system?
1.
Power generating plants
2.
Circuits carrying large bulks
of high-voltage power
3.
Subtransmission substations
4.
Primary feeders
In which of the following manners
are transmission circuits most
often run?
1.
Overhead on poles or towers
2.
Direct-buried
3.
Underground in cable duct
4.
All of the above
For which of the following purposes
are substations used in an
electrical power system?
1.
To step-up voltage only
2.
To step-up or step-down voltage
3.
TO provide protection against
faults
4.
Both 2 and 3 above
At what location in a power system
does the distribution system begin?
1.
At the generating plant
2.
At the distribution substation
3.
At the distribution center
4.
At the distribution transformer
Which of the following items are
NOT part of a typical power
distribution system?
1.
Circuit breakers
2.
Service entrances
3.
Service drops or laterals
4.
All of the above
A.
Radial system
B.
Loop system
c.
Network system
Figure 2A
IN ANSWERING QUESTIONS 2-6 THROUGH 2-9,
SELECT FROM FIGURE 2A THE TYPE OF FEEDER
SYSTEM THAT BEST MATCHES THE
CHARACTERISTIC GIVEN AS THE QUESTION.
2-6.
2-7.
2-8.
2-9.
Starts and ends at the same
distribution substation.
1. A
2. B
3. C
Least costly but most unreliable
type of feeder system.
1. A
2. B
3. C
Uses subfeeders and branch circuits
to take power to load centers.
1. A
2. B
3. C
Readily adaptable to future
requirements.
1. A
2. B
3. C
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