Lesson T4.4.1
T4.4.1 Sensors and actuators Quiz: KS3 Design & Technology, Unit 4
20 questions
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Lesson T4.4.1, Sensors and actuators: 20 multiple choice questions for the KS3 Design & Technology (National Curriculum), Unit 4: Technical knowledge, written with Revision Ninja.
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The 20 questions
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What is the function of a sensor in an electronic circuit?
- Amplifies sound signals
- Produces mechanical motion
- Stores electrical energy
- Detects physical change
-
What is the function of an actuator in an electronic system?
- Produces physical action
- Processes logic signals
- Detects light levels
- Measures temperature
-
What does a servo motor do in a control system?
- Spin continuously
- Emit bright light
- Measure temperature
- Turn specific angles
-
Which component is classed as an input device?
- Servo motor
- LED
- Buzzer
- Push switch
-
Which sensor measures distance using sound echoes?
- Temperature sensor
- Ultrasonic sensor
- Magnetic reed switch
- Light dependent resistor
-
What type of signal does an analogue sensor produce for a microcontroller?
- Binary on or off
- Single voltage pulse
- Continuous range of values
- Fixed digital data
-
Which device lets a user set a variable level by turning a knob?
- Buzzer
- Push switch
- Potentiometer
- Reed switch
-
Which sensor combination is best for a robot avoiding walls?
- Humidity and pressure
- Ultrasonic and bump switch
- Sound and moisture
- Light and temperature
-
Which actuator is best for rotating a latch to an exact angle?
- Heater element
- Servo motor
- Standard DC motor
- Buzzer
-
Which component directly converts electrical energy into sound waves in a circuit?
- Microswitch
- Buzzer
- LDR
- Thermistor
-
What type of output is a smoothly varying voltage in a control system?
- Latched output
- Digital output
- Binary output
- Analogue output
-
What type of signal is either high or low?
- Analogue signal
- Variable signal
- Digital signal
- Continuous signal
-
What has turned a sensor voltage into a 0 to 1023 value?
- Pulse width modulator
- Analogue-to-digital converter
- Voltage amplifier
- Digital-to-analogue converter
-
Which sensor detects whether a box lid is closed using a magnet?
- Ultrasonic sensor
- Push switch
- Magnetic reed switch
- Thermistor
-
Which sensor decreases its electrical resistance when ambient light levels increase?
- Thermistor
- Piezo
- PIR sensor
- LDR
-
Why might a designer choose a stepper motor?
- Instant heating
- High fluid pressure
- Precise angular steps
- Maximum continuous speed
-
What type of sensor measures system performance to allow self-correction?
- Temperature sensor
- Proximity sensor
- Digital sensor
- Feedback sensor
-
What purpose does a pull-down resistor serve on a microcontroller switch input?
- Power the microcontroller
- Prevent floating inputs
- Short circuit power
- Increase current flow
-
Which component acts as an output device in a temperature-controlled cooling system?
- Fan motor
- Thermistor
- Microcontroller
- Push switch
-
Why is a transistor required when driving a high-current motor from a microcontroller?
- Pins output high voltage
- Motors require logic signals
- Motors need AC power
- Pins provide low current
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