thermocouple

What is a thermocouple?

• A device used to measure pressure

• A device used to measure temperature

• A device used to measure humidity

• A device used to measure voltage

How does a thermocouple work?

• By measuring the resistance of a material

• By measuring the flow of electric current

• By measuring the expansion of a liquid

• By measuring the change in voltage across two dissimilar metals

Which of the following metals are commonly used in thermocouples?

• Copper and aluminum

• Iron and steel

• Copper and constantan

• Silver and gold

Which of the following is an advantage of using a thermocouple for temperature measurement?

• High accuracy

• Low cost

• Wide temperature range

• Non-contact measurement

What is the typical voltage output of a thermocouple?

• 1 volt

• 5 volts

• 10 volts

• It depends on the temperature difference

What is the purpose of a cold junction compensation in a thermocouple measurement system? a) b) c) d)

• To provide a reference temperature for accurate measurements

• To amplify the thermocouple signal

• To protect the thermocouple from excessive heat

• To convert the temperature into a digital value