12 input devices Quiz

What type of peripheral input device is a proximity sensor?

• Digital

• Analogue

• Hybrid

• Optical

Which of the following is an example of an analogue peripheral input device?

• Proximity sensor

• Mechanical switch

• Temperature transducer

• Light sensor

What does a thermocouple do?

• Converts temperature difference into electrical output

• Converts electrical input into mechanical motion

• Stores electrical energy

• Displays temperature readings

What is a transducer generally used for?

• To convert a signal from one form to a different physical form

• To amplify electrical signals

• To store digital data

• To display visual information

What must be done to analog signals before they can be input to PLC ports?

• Convert them to digital signals

• Amplify them

• Store them in memory

• Display them on a screen

Which of the following is an issue that input sensors may face?

• Durability

• Accuracy

• Cost

• Size

Input sensors may have problems with which of the following?

• Response time

• Temperature

• Material

• Design

Which issue is related to the ability of input sensors to detect small changes?

• Sensitivity

• Speed

• Volume

• Shape

How are mechanical switches specified?

• By the color of the switch

• By the number of poles and throws

• By the size of the switch

• By the weight of the switch

What is the primary function of a limit switch?

• To detect the presence or passage of a moving part

• To control the speed of a motor

• To measure temperature changes

• To regulate electrical voltage