What are examples of digital peripheral output devices?

• Indicators, electromechanical devices, electro-pneumatic devices

• Motor position and speed

• Temperature sensors and gauges

• Light sensors and cameras

What components are used in the output ports of a PLC?

• Relays or optoisolators with transistors or triacs

• Capacitors and resistors

• Diodes and LEDs

• Transformers and inductors

What happens when a current passes through a solenoid?

• A magnetic field is produced

• A chemical reaction occurs

• Heat is generated

• Light is emitted

What is the result of a relay connected to the output of a PLC when the output switches on?

• The relay emits light

• The relay stores energy

• Much larger currents can be switched on

• The relay decreases voltage

What is the term used for a relay whose contacts remain open or closed even after the power has been removed from the solenoid?

• Contact relay

• Latching relay

• Switching relay

• Power relay

What is the function of a spool valve in a cylinder?

• To control the movement of a piston

• To increase air pressure

• To decrease oil flow

• To regulate temperature

What are directional control valves described by?

• The number of ports and control positions

• The size and shape of the valve

• The color and material of the valve

• The weight and height of the valve

How are switching positions within each square described?

• By colors

• By arrows

• By numbers

• By letters

What is a key difference between a brushless DC motor and a conventional DC motor?

• Brushless DC motors use a commutator to reverse current.

• Conventional DC motors use electronic circuitry to reverse current.

• Brushless DC motors use electronic circuitry to reverse current.

• Conventional DC motors do not require any current reversal.