Correct Answer:
A. Limited Accuracy; Use of Calibration: Thermocouples have limited accuracy compared to other temperature sensors, but this is overcome by regularly calibrating the thermocouple to ensure accurate measurements.
Explanation:
- A. Correct: Thermocouples can be less accurate than other temperature sensors. To overcome this limitation, they are regularly calibrated against known temperature standards to maintain accuracy.
- B. Incorrect: Thermocouples generally have a good response time for most applications. Insulation is not typically used to address response time but to protect the thermocouple or manage heat transfer in specific conditions.
- C. Incorrect: While electromagnetic interference can affect some temperature sensors, it is less of an issue with thermocouples when proper wiring practices are followed. Shielded cables are more commonly used for other types of sensors that are more sensitive to interference.
- D. Incorrect: Thermocouples are available in different types, with varying temperature ranges, to cover a wide range of applications. The use of special alloys is a solution for extending the temperature range, but this is not the primary limitation addressed.
Correct Answer:
A. Limited Accuracy; Use of Calibration: Thermocouples have limited accuracy compared to other temperature sensors, but this is overcome by regularly calibrating the thermocouple to ensure accurate measurements.
Explanation:
- A. Correct: Thermocouples can be less accurate than other temperature sensors. To overcome this limitation, they are regularly calibrated against known temperature standards to maintain accuracy.
- B. Incorrect: Thermocouples generally have a good response time for most applications. Insulation is not typically used to address response time but to protect the thermocouple or manage heat transfer in specific conditions.
- C. Incorrect: While electromagnetic interference can affect some temperature sensors, it is less of an issue with thermocouples when proper wiring practices are followed. Shielded cables are more commonly used for other types of sensors that are more sensitive to interference.
- D. Incorrect: Thermocouples are available in different types, with varying temperature ranges, to cover a wide range of applications. The use of special alloys is a solution for extending the temperature range, but this is not the primary limitation addressed.