Question

Dummy strain gauge is used:

• A. to increase sensitivity
• B. to measure tensile strength
• C. for temperature compensation
• D. to measure compressive strain

Hint:

Dummy strain gauges are used in conjunction with active strain gauges to nullify the effect of temperature changes and improve the accuracy of strain measurements.

Answer 1

The Correct Option is C

A dummy strain gauge is not sensitive to strain but is used in strain gauge applications for compensation purposes.
- The temperature compensation is the correct use of a dummy strain gauge. It helps cancel out the effects of temperature changes on the strain measurement.
- A dummy strain gauge does not increase sensitivity or measure tensile strength, as it is not sensitive to strain.
- Similarly, it does not measure compressive strain directly but is used to balance out temperature variations.
Therefore, the correct answer is for temperature compensation.