Quiz on Physical Systems and Control

What is a physical system?

• A system that does not respond to the environment

• A system that uses software and hardware to interact with the environment

• A system that only uses software

• A system that only uses hardware

Which of the following is NOT a use of physical systems?

• Exploring space

• Cooking food

• Simulating risky environments

• Controlling systems more accurately

What role do sensors play in a physical system?

• They create physical actions

• They store data

• They process data

• They gather measurable data from the environment

What is an actuator?

• A device controlled by a computer that makes physical actions

• A device that creates light

• A device that gathers data

• A device that processes information

Which of the following is an example of a sensor?

• Heater

• Temperature sensor

• Light bulb

• Motor

What does a temperature sensor measure?

• Humidity levels

• Light levels

• Temperature

• Sound levels

Which of the following is an example of an actuator?

• Light sensor

• Infra-red sensor

• Buzzer

• Tilt sensor

What happens when a light sensor detects darkness in an automated greenhouse?

• The windows close

• The water pump activates

• The heater turns on

• The lights turn on

What is the function of a moisture sensor in a greenhouse?

• To control the heater

• To detect light levels

• To check soil wetness

• To measure temperature

Which of the following statements is true about sensors?

• Sensors process data

• Sensors only pass data to the computer

• Sensors can control actuators directly

• Sensors create physical actions