Question

Identify the correct statement related to tape correction in chain surveying:

• A. Wrong alignment correction is always positive.
• B. Sag correction is always negative.
• C. Slope of tape correction is always positive.
• D. Temperature correction is always negative.

Hint:

In chain surveying, always remember that sag correction is negative because the tape stretches under its own weight. For temperature corrections, consider the material of the tape.

Answer 1

The Correct Option is B

In chain surveying, various corrections are applied to improve the accuracy of measurements. Let's analyze each option:

Option A: Wrong alignment correction is always positive.
This statement is incorrect because wrong alignment correction can be either positive or negative, depending on the direction of the error.

Option B: Sag correction is always negative.
This is the correct statement. Sag correction is related to the stretching of the tape due to its own weight, which causes the measured length to be longer than the true length. Therefore, the correction is negative, and it subtracts from the measured distance.

Option C: Slope of tape correction is always positive.
This statement is incorrect because slope correction can be either positive or negative, depending on whether the tape is being used on an inclined or declining surface.

Option D: Temperature correction is always negative.
This statement is incorrect because temperature correction depends on the type of material the tape is made from. For example, if the temperature increases, the tape might expand, and the correction could be positive or negative, depending on the circumstances.

Hence, the correct answer is: Option B - Sag correction is always negative.