WORKSHEET #2

Question 1

2. Describe in your words a circuit diagram?

Answer 1

a cicuit diagram is

Question 2

4. Describe in your words a ladder diagram?

Answer 2

Ladder diagrams are taking very complex circuits and organizing them
in a manner known as ladder logic that is easy for an electrician to interpret

Question 3

what is
the downside to using a ladder?

Question 4

Describe in your words a schematic diagram?

Question 5

Name 1 disadvantages, and 1 advantage that Schematic diagrams have as
compares to Ladder diagrams as discussed in class?

Question 6

Describe in your words a wiring diagram?

Question 7

Would the 4 way switching circuit we created be considered a multi-wired branch circuit?

Answer 7

Yes, it would be considered a multi-wired branch circuit.

Question 8

What are the two main types of circuits in motor control?

Answer 8

The two main types of circuits are the control circuit and the branch circuit.

Question 9

In terms of input vs output wiring, which circuit is considered the input and which is the output?

Answer 9

The control circuit is the input, and the branch circuit is the output.

Question 10

What type of device opens or closes a contact based on parameters like temperature or pressure?

Answer 10

This type of device is typically found in a control circuit and is considered an input device.

Question 11

What type of device receives a signal from an input device and allows current to flow?

Answer 11

This device is best described as an output device.

Question 12

What type of circuit performs tasks like illuminating a room or creating sound?

Answer 12

This is an output circuit.

Question 13

What is the traditional method of motor control in the electrical industry?

Answer 13

Traditionally, motor control was performed without the aid of computers, mainly using Relay logic.

Question 14

What does Relay logic utilize to achieve desired changes?

Answer 14

Relay logic utilizes contacts and coils to achieve desired changes.

Question 15

What type of control logic is described as predetermined by design and predominantly binary?

Answer 15

This describes Relay logic.

Question 16

What type of Control logic utilizes contacts and coils to achieve desired change?

Answer 16

Relay Logic

This logic uses physical change to open or close contacts, allowing electrical devices to create change.

Question 17

What functionality does Relay Logic utilize?

Answer 17

It utilizes electrical devices that can perform a range of functionality including both binary and analog control with simple programming.

Question 18

What advantage does Relay Logic provide?

Answer 18

It allows for more flexibility in its processes.

Question 19

Can we use a ladder diagram to demonstrate both Relay Logic and PLC?

Answer 19

Yes.

Question 20

Do companies who create diagrams all use the exact symbols?

Answer 20

No, companies use different symbols based on their standards.

In European Countries they use (IEC) standard Symbols and in North America we use (MEMA) symbols.

Question 21

What does IEC stand for?

Answer 21

IEC stands for International Electrotechnical Commission.

Question 22

What does NEMA stand for?

Answer 22

NEMA stands for National Electrical Manufacturers Association.

Question 23

If contacts are in a position that allows current to flow, are they considered open or closed?

Answer 23

They are considered closed.

Question 24

How would we describe contacts in a de-energized state with no path for current to flow?

Answer 24

They would be described as open.

The short form is ‘NO’ (Normally Open).

Question 25

How would you describe a device when de-energized with contacts that allow a path for current to flow?

Answer 25

They would be described as closed. ## Footnote The short form is 'NC' (Normally Closed).

Question 26

What is the state of a device's contacts that are NO after being actuated?

Answer 26

The contacts' state is now closed.

Question 27

What is the state of a device's contacts that are NC after being actuated?

Answer 27

The contacts' state is now open.

Question 28

Can a device have multiple contacts that are both NO and NC?

Answer 28

Yes, electricians identify and describe those contacts using specific symbols.

Question 29

Are there different contact symbols depending on the function of the device?

Answer 29

Yes, different contact symbols exist based on the device's function.

Question 30

Are pushbuttons manual or automatic devices?

Answer 30

Pushbuttons are manual devices.

Question 31

Are pushbuttons considered input or output devices?

Answer 31

Pushbuttons are considered input devices.

Question 32

In a diagram with both branch circuit and control wiring, where are pushbuttons most likely found?

Answer 32

Pushbuttons are most likely found in the control circuit.

Question 33

What is the most common function type of push buttons?

Answer 33

The most common function type is momentary contact, where a spring returns the button to the normal state.

Question 34

What are push-pull type buttons also referred to as?

Answer 34

Push-pull type buttons are sometimes referred to as latching buttons.

Question 35

Are switches like single pole, 3-way, and motor starter switches manual or automatic devices?

Answer 35

These switches are considered manual devices.

Question 36

Are switches considered input or output devices?

Answer 36

Switches are considered output devices.

Question 37

In a diagram with both branch circuit and control circuit, where are switches most likely found?

Answer 37

Switches are most likely found in the branch circuit.

Question 38

What are some examples of sensing devices listed in the book?

Answer 38

Limit, float, pressure, flow, temperature, and timed contacts are examples of sensing devices.

Question 39

List 5 different sensing devices that do not have a standard symbol.

Answer 39

Examples include various types of sensors like photoelectric sensors, ultrasonic sensors, capacitive sensors, inductive sensors, and magnetic sensors.

Question 40

What is the purpose of a limit switch?

Answer 40

The purpose of a limit switch is to detect the presence or position of an object.

Question 41

Are limit switches considered manual or automatic devices?

Answer 41

Limit switches are considered automatic devices.

Question 42

Are limit switches considered input or output devices?

Answer 42

Limit switches are considered input devices.

Question 43

In a diagram with both branch circuit and control circuit, where are limit switches most likely found?

Answer 43

Limit switches are most likely found in the control circuit.

Question 44

Give an example of a practical application for a limit switch?

Answer 44

Limit switches are commonly used in industrial machinery to detect the position of a moving part.

Question 45

What is the purpose for a Float switch?

Answer 45

Float switches are used to detect the level of liquid in a tank.

Question 46

Are float switches considered a manual or automatic device?

Answer 46

Float switches are considered automatic devices.

Question 47

Would float switches be considered an input device or an output device?

Answer 47

Float switches are considered input devices.

Question 48

In a diagram that has both a branch circuit and a control circuit, where would you most likely find switches?

Answer 48

You would most likely find switches in the control circuit.

Question 49

Give an example of a practical electrical application for a float switch?

Answer 49

Float switches are used in sump pumps to prevent overflow.

Question 50

What is the purpose for a Pressure switch?

Answer 50

Pressure switches are used to monitor and control pressure levels in a system.

Question 51

Are pressure switches considered a manual or automatic device?

Answer 51

Pressure switches are considered automatic devices.

Question 52

Would pressure switches be considered an input device or an output device?

Answer 52

Pressure switches are considered input devices.

Question 53

Give an example of a practical application for a pressure switch?

Answer 53

Pressure switches are used in HVAC systems to control fan operation based on pressure.

Question 54

What is the purpose for a Flow switch?

Answer 54

Flow switches are used to detect the flow of liquids or gases in a system.

Question 55

Are flow switches considered a manual or automatic device?

Answer 55

Flow switches are considered automatic devices.

Question 56

Would flow switches be considered an input device or an output device?

Answer 56

Flow switches are considered input devices.

Question 57

Give an example of a practical application for a flow switch?

Answer 57

A practical application for a flow switch is in a water pump system to ensure that the pump operates only when there is sufficient water flow.

Question 58

What is the purpose of a temperature switch?

Answer 58

The purpose of a temperature switch is to monitor and control temperature levels in a system.

Question 59

Are temperature switches considered a manual or automatic device?

Answer 59

Temperature switches are considered automatic devices.

Question 60

Would temperature switches be considered an input device or an output device?

Answer 60

Temperature switches are considered input devices.

Question 61

In a diagram that has both a branch circuit and a control circuit, where would you most likely find switches?

Answer 61

You would most likely find switches in the control circuit.

Question 62

Give an example of a practical application for a temperature switch?

Answer 62

An example of a practical application for a temperature switch is in a thermostat used for heating or cooling systems.

Question 63

When we use the terms; Single Pole, Double Pole, Three Pole, etc., what does this mean?

Answer 63

These terms refer to the number of circuits a switch can control.

Question 64

If we say a switch or similar device is a, 'Single Throw – Double Pole' what does this mean?

Answer 64

This means the switch can control two separate circuits with a single action.