Deck 20: Schematics and Wiring Diagrams

Question 1

Schematics are generally read ____.

A) from right to left
B) from left to right
C) from bottom to top
D) in any direction desired

Answer 1

B

Question 2

Figure 20-3 problem 10
What schematic symbol is shown in the accompanying figure?

A) Normally Open Contacts
B) Solenoid Coil
C) Coil
D) Normally Closed Contacts

Answer 2

B

Question 3

Figure 20-3 problem 5
What schematic symbol is shown in the accompanying figure?

A) Normally Open Float Switch
B) Normally Closed Float Switch
C) Normally Open Held-Closed Float Switch
D) Normally Closed Held-Open Float Switch

Answer 3

D

Question 4

Figure 20-3 problem 9
What schematic symbol is shown in the accompanying figure?

A) Normally Open Pushbutton
B) Normally Closed Pushbutton
C) Double Acting Pushbutton
D) Overload Heater

Question 5

Figure 20-3 problem 11
What schematic symbol is shown in the accompanying figure?

A) Transformer
B) Lamp
C) Single-Phase Squirrel-Cage Motor
D) Three-Phase Squirrel-Cage Motor

Question 6

The load contacts are ____ and intended to control ____ amounts of current.

A) small; small
B) small; large
C) large; small
D) large; large

Question 7

Schematic diagrams show components in their electrical sequence.

Question 8

Figure 20-3 problem 8
What schematic symbol is shown in the accompanying figure?

A) Normally Open Pushbutton
B) Normally Closed Pushbutton
C) Double Acting Pushbutton
D) Overload Heater

Question 9

A motor starter is basically an electrically operated switch or solenoid with multiple contacts connected to it.

Question 10

Which of the following is a rule to use when numbering a schematic diagram?

A) Each time you go through a component, the number set must be reused.
B) A set of numbers can be used only once.
C) All components that are connected together will have different numbers.
D) A set of numbers must be used at least twice.

Question 11

Figure 20-3 problem 12
What schematic symbol is shown in the accompanying figure?

A) Transformer
B) Lamp
C) Single-Phase Squirrel-Cage Motor
D) Three-Phase Squirrel-Cage Motor

Question 12

The most frequently employed schematic symbols are those used by the National ____ Association (NEMA).

A) Electromechanical
B) Electric Motor
C) Electrical Manufacturers
D) Electromagnetic

Question 13

Which of the following is a section of the overload relay?

A) cooler
B) current
C) voltage
D) contact

Question 14

After the components on the schematic have been numbered, the next step is to place the same numbers on the corresponding components of the wiring diagram.

Question 15

Figure 20-3 problem 6
What schematic symbol is shown in the accompanying figure?

A) Normally Open Temperature Switch (Thermostat)
B) Normally Open Flow Switch
C) Normally Open Pressure Switch
D) Normally Open Limit Switch

Question 16

The overload relay is divided into three separate sections.

Question 17

Figure 20-3 problem 7
What schematic symbol is shown in the accompanying figure?

A) Normally Open Temperature Switch (Thermostat)
B) Normally Open Flow Switch
C) Normally Open Pressure Switch
D) Normally Open Limit Switch

Question 18

Figure 20-3 problem 4
What schematic symbol is shown in the accompanying figure?

A) Normally Open Float Switch
B) Normally Closed Float Switch
C) Normally Open Held-Closed Float Switch
D) Normally Closed Held-Open Float Switch

Question 19

Schematics are always shown in the ____ condition.

A) off
B) on
C) energized
D) portable

Question 20

A motor starter is a contactor and an overload relay combined.