Lesson 4

Question 1

The motor capacitor (MC) in this diagram is connected to the tap changer terminal board at positions ____.

a. 1 and G
b. 1 and 4
c. 4 and 5
d. 5 and 6

Reference: Schematic Diagrams, “Types of Schematic Diagrams,” Figure 4

Answer 1

c. 4 and 5

Question 2

The number 1 and 2 terminals of the current transformer shown in this diagram are connected by two wires colored ____.

a. black and red
b. blue and white
c. orange and black
d. white and black

Reference: Schematic Diagrams, “Types of Schematic Diagrams,” Figure 4

Answer 2

d. white and black

Question 3

In this diagram, the wire that connects the number 1 position of the motor capacitor to the tap changer motor is colored ____.

a. black
b. blue
c. red
d. white

Reference: Schematic Diagrams, “Types of Schematic Diagrams,” Figure 4

Answer 3

b. blue

Question 4

In this diagram, all four wires from the control winding to the tap changer terminal board are ____.

a. black
b. green
c. red
d. white

Reference: Schematic Diagrams, “Types of Schematic Diagrams,” Figure 4

Answer 4

d. white

Question 5

In this diagram, the initials PS are used to indicate the ____.

a. panel fuse
b. potential shunt
c. potential sychronizer
d. power switch

Reference: Schematic Diagrams, “Types of Schematic Diagrams,” Figure 3

Answer 5

d. power switch

Question 6

In this diagram, the differential potential transformer has no ground on the secondary side and is connected as a straight delta.

Reference: Schematic Diagrams, “Types of Schematic Diagrams,” Figure 3

Answer 6

True or False?

Question 7

The ratio correction transformers shown in this diagram are indicating ____.

a. 110
b. 115
c. 120
d. 127

Reference: Schematic Diagrams, “Types of Schematic Diagrams,” Figure 3

Answer 7

c. 120

Question 8

The raise limit switch in this diagram is also called the ____.

a. boost stop
b. position indicator
c. ratio changer
d. tap selector

Reference: Schematic Diagrams, “Types of Schematic Diagrams,” Figure 3

Answer 8

b. position indicator

Question 9

In this diagram, the control windings are the secondary coils of a transformer with the ____ winding being the primary coil.

a. differential
b. series
c. shunt
d. toroidal

Reference: Schematic Diagrams, “Types of Schematic Diagrams,” Figure 3

Answer 9

c. shunt

Question 10

This diagram shows three individual transformers connected in a ____ configuration.

a. delta-delta
b. delta-wye
c. wye-delta
d. wye-wye

Reference: Schematic Diagrams, “Types of Schematic Diagrams,” Figure 1

Answer 10

a. delta-delta

Question 11

This diagram has a ground installed on the primary side of the transformers.

True or False?

Reference: Schematic Diagrams, “Types of Schematic Diagrams,” Figure 1

Answer 11

False

Question 12

This schematic diagram shows that the shunt field winding is a part of the ____ circuit.

a. control
b. exciter
c. power
d. stator

Reference: Schematic Diagrams, “Types of Schematic Diagrams,” Figure 2

Answer 12

b. excitor

Question 13

The discharge resistor in this diagram is between F1 and F2 of the synchronous motor.

True or False?

Answer 13

True

Question 14

In this diagram, the power to the control circuit is supplied by the ____.

a. CT
b. excitor generator
c. reactor
d. shunt field

Reference: Schematic Diagrams, “Types of Schematic Diagrams,” Figure 2

Answer 14

a. CT

Question 15

The acronym RES in this diagram stands for Reactor Synchronous Armature.

True or False?

Reference: Schematic Diagrams, “Types of Schematic Diagrams,” Figure 2

Answer 15

False

Question 16

This diagram shows ____ ground(s) that may be applied to the control circuit.

a. 1
b. 2
c. 3
d. 4

Reference: Schematic Diagrams, “Types of Schematic Diagrams,” Figure 3

Answer 16

b. 2

Question 17

A schematic diagram is a complex pictorial representation of an electrical circuit.

True or False?

Reference: Schematic Diagrams, “Introduction,” Paragraph 1, Sentence 1

Answer 17

False

Question 18

The arrangements of the components and their interconnections on a schematic diagram does not correspond to their physical locations in the finished device or circuit.

True or False?

Reference: Schematic Diagrams, “Introduction,” Paragraph 2, Sentence 1

Answer 18

True

Question 19

The differential potential transformer in this diagram must be at ____ in order to produce 120 volts on the secondary side.

a. P1
b. P2
c. P3
d. P4

Reference: Schematic Diagrams, “Types of Schematic Diagrams,” Figure 3

Answer 19

a. P1

Question 20

In this diagram, the three wires connected to the tap changer motor are ____ in color.

a. black, orange, and red
b. blue, red, and black
c. blue, red, and white
d. green, orange, and white

Reference: Schematic Diagrams, “Types of Schematic Diagrams,” Figure 4

Answer 20

c. blue, red, and white