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Which of the following statements is correct about corrections applied to length measured by a tape?
- a)Slope correction is always positive
- b)Sag correction is always negative
- c)Temperature correction is always positive
- d)Correction due to mean sea level is always positive.
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Which of the following statements is correct about corrections applied...
Tape corrections-
- Correction for Absolute Length
- Slope Correction
- Correction for Temperature
- Correction for Tension
- Correction for Sag
- Correction for Incorrect Alignment
- Reduction to Mean Sea Level
Slope correction is always subtractive
Sag correction is always negative
Temperature correction is positive when applied pull is more than the standard pull and negative when applied pull is less than the standard pull
Correction due to mean sea level is always subtractive
Sag correction is always negative
Temperature correction is positive when applied pull is more than the standard pull and negative when applied pull is less than the standard pull
Correction due to mean sea level is always subtractive
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Community Answer
Which of the following statements is correct about corrections applied...
Explanation:
Sag correction: Sag correction is a correction applied to compensate for the sag or droop that occurs in the tape due to its own weight. The sag correction is always negative because the sag in the tape causes it to measure a longer length than the actual distance being measured. Therefore, the correction is subtracted from the measured length to obtain the true length.
Temperature correction: Temperature correction is applied to account for the expansion or contraction of the tape due to temperature variations. The temperature correction can be either positive or negative depending on the direction of the temperature change. If the temperature increases, the tape expands and measures a longer length, requiring a positive correction. Conversely, if the temperature decreases, the tape contracts and measures a shorter length, requiring a negative correction.
Correction due to mean sea level: The correction due to mean sea level is applied to account for the difference in elevation between the measuring point and the mean sea level. This correction is always positive because the elevation of the measuring point is always greater than the mean sea level. Therefore, the correction is added to the measured length to obtain the true length.
Slope correction: Slope correction is applied when the tape is not horizontal but inclined. The slope correction can be positive or negative depending on the inclination of the tape. If the tape is inclined upwards, the correction is positive, and if the tape is inclined downwards, the correction is negative. However, it is important to note that the slope correction is not always positive. It depends on the direction and angle of the slope.
Therefore, the correct statement is option 'B' - "Sag correction is always negative."
Sag correction: Sag correction is a correction applied to compensate for the sag or droop that occurs in the tape due to its own weight. The sag correction is always negative because the sag in the tape causes it to measure a longer length than the actual distance being measured. Therefore, the correction is subtracted from the measured length to obtain the true length.
Temperature correction: Temperature correction is applied to account for the expansion or contraction of the tape due to temperature variations. The temperature correction can be either positive or negative depending on the direction of the temperature change. If the temperature increases, the tape expands and measures a longer length, requiring a positive correction. Conversely, if the temperature decreases, the tape contracts and measures a shorter length, requiring a negative correction.
Correction due to mean sea level: The correction due to mean sea level is applied to account for the difference in elevation between the measuring point and the mean sea level. This correction is always positive because the elevation of the measuring point is always greater than the mean sea level. Therefore, the correction is added to the measured length to obtain the true length.
Slope correction: Slope correction is applied when the tape is not horizontal but inclined. The slope correction can be positive or negative depending on the inclination of the tape. If the tape is inclined upwards, the correction is positive, and if the tape is inclined downwards, the correction is negative. However, it is important to note that the slope correction is not always positive. It depends on the direction and angle of the slope.
Therefore, the correct statement is option 'B' - "Sag correction is always negative."
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Which of the following statements is correct about corrections applied to length measured by a tape?a)Slope correction is always positiveb)Sag correction is always negativec)Temperature correction is always positived)Correction due to mean sea level is always positive.Correct answer is option 'B'. Can you explain this answer?
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