READ AND WRITE SEQUENCE DIAGRAM

What is a relay sequence circuit?

• A circuit composed of electromagnetic relays used for control

• A circuit composed of mechanical contacts used for control

• A circuit composed of push button switches used for control

• A circuit composed of lamps used for control

What is a sequence diagram?

• A diagram that shows the operations and functions of electrical equipment

• A diagram that shows the physical wiring of a circuit

• A diagram that shows the mechanical relationship between relays and contacts

• A diagram that shows the structure and wiring of equipment

How is a relay sequence circuit represented in a physical wiring diagram?

• By showing the mechanical relationship between relays and contacts

• By showing the structure and wiring of equipment

• By showing the operations and functions of electrical equipment

• By showing the actual wiring of the circuit

What is the purpose of a sequence diagram?

• To make it easier to understand the contents of the operation of a relay circuit

• To show the physical wiring of a circuit

• To show the mechanical relationship between relays and contacts

• To show the structure and wiring of equipment

How are control power lines represented in a sequence diagram?

• By horizontal lines at the top and bottom of the diagram

• By vertical lines at the left and right of the diagram

• By perpendicular lines to the power lines

• By diagonal lines connecting the control equipment

What is the advantage of an actual wiring diagram?

• Convenient for actual manufacturing and maintenance

• Easy to understand the operating principle and operation order

• Shows the mechanical relationship between relays and contacts

• Shows the structure and wiring of equipment

What is the disadvantage of an actual wiring diagram?

• Difficult to understand the operating principle and operation order

• Inconvenient for actual manufacturing and maintenance

• Does not show the mechanical relationship between relays and contacts

• Does not show the structure and wiring of equipment

How are equipment symbols written in a vertical sequence diagram?

• Vertically

• Horizontally

• Diagonally

• Circularly

How are equipment symbols written in a horizontal sequence diagram?

• Horizontally

• Vertically

• Diagonally

• Circularly

How is the power supply represented in a sequence diagram?

• Top or left is represented as a plus (positive electrode)

• Top or left is represented as the ungrounded pole

• Bottom or right is represented as a plus (positive electrode)

• Bottom or right is represented as the ungrounded pole