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Thermocouple leads
Can be easily altered.
May be lengthened as needed.
Are designed for a specific installation and may not be altered.
None of the above.
The correct answer is: Are designed for a specific installation and may not be altered.
Thermocouple leads are designed for specific installations and should not be altered. This is because any alterations or modifications can affect the sensitivity and accuracy of the thermocouple. Option A is incorrect because altering thermocouple leads can lead to inaccurate temperature readings. Option B is incorrect because although thermocouple leads can be extended, this should only be done using specialized extension wires to maintain accuracy. Option D is incorrect because thermocouple leads should not be altered or modified in any way.