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Question 1

What is a double pole switch?

Answer 1

A double pole switch is used whenever two conductors are to be switched simultaneously. As if two single pole switches with their operating handle tied together. Ie; 240v electric heaters, a/c units and other appliances.

Question 2

What is the purpose of a four way switch?

Answer 2

Four switches are necessary when a load is to be controlled from 3 or more locations. They’re used in combination with three way switches.

Question 3

What is a three way switch used for?

Answer 3

A three way switch is dysxto be used when you want to control a load ii

Question 4

If an ohmmeter reads 0 ohms across two terminals, this means the terminals are ……..?

Answer 4

Connected

Question 5

If a digital meter beeps when set for checking continuity while the probes are across two terminal, the terminals are……. Connected or disconnected?

Answer 5

Connected

Question 6

What’s a multiple function switch?

Answer 6

A switch usually manufactured as sliding, rotary or pull-chain cam type switches, with multiple functions. Most common exampl would be a pole lamp or ceiling fan.

Question 7

What is a single pole switch?

Answer 7

A witch used when only one conductor is to be switched.

Question 8

What purpose does a schematic diagram serve?

Answer 8

Shows the logical sequence operation of a circuit without regard to physical location of the circuit components. Sometimes called elementary diagrams or ladder diagrams.

Question 9

What’s is a wiring diagram?

Answer 9

A graphic representation of a circuit showing the electrical interconnection of circuit components and their relative physical location.
Provides a guide for the installations of conductors and components.
Helps determine the number of conductors in a conduit.

Question 10

What is a switch used for?

Answer 10

Used to control or isolate devices.

Question 11

When connecting a landholder to a circuit, the identified conductor must be connected to
A) the brass terminal screw
B) the silver terminal screw

Answer 11

The silver terminal screw

Question 12

A three way switch has three terminals, what are they called?

Answer 12

One terminal called a common and two others are called travellers.

Question 13

Which conductor should be connected to the brass screw of a landholder on a switched circuit?

Answer 13

The switch leg (coloured)

Question 14

Which conductor is connected to the silver screw terminal on a duplex receptacle?

Answer 14

Identified

Question 15

What does it mean when a switch is a momentary switch?

Answer 15

Signifies that the device changes state only when an outside force acts upon it. Returns to the original position when force is removed.

Question 16

What does it mean when a switch is maintained?

Answer 16

Signifies that the device changes state when acted upon by an outside force and remains in that state when the force is removed.

Question 17

What is a three pole switch?

Answer 17

A three pole switch is used whenever three conductors must be switched simultaneously. Often used as a disconnecting means for motors, panel boards or other equipment that have 3 live conductors feeding such as a 3-phase circuit.

Question 18

Identify the 6 main parts of a relay.

Answer 18

Relay coil
Core
Return spring
Armature 
Normally open contacts
Normally closed contacts