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Q: Which of the following is a personal mistake?
  • A. Variation in temperature
  • B. Sag in Chain
  • C. Variation in Pull
  • D. Misreading
Correct Answer: Option D - Personal Errors-Error may also arise due to want of perfection of human sight in observing and of touch in manipulating instruments. For example,an error may be there in taking the level reading or reading an angle on the circle of a theodolite. Such errors are known as personal errors.
D. Personal Errors-Error may also arise due to want of perfection of human sight in observing and of touch in manipulating instruments. For example,an error may be there in taking the level reading or reading an angle on the circle of a theodolite. Such errors are known as personal errors.

Explanations:

Personal Errors-Error may also arise due to want of perfection of human sight in observing and of touch in manipulating instruments. For example,an error may be there in taking the level reading or reading an angle on the circle of a theodolite. Such errors are known as personal errors.