Question:
In the etch method, the acid used to measure borehole deviation is
In the etch method, the acid used to measure borehole deviation is
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Hydrofluoric acid is one of the few acids that attacks glass, making it suitable for the etch method of borehole deviation measurement.
Updated On: Jul 14, 2026
- Sulphuric acid
- Hydrochloric acid
- Nitric acid
- Hydrofluoric acid
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The Correct Option is D
Solution and Explanation
Step 1: Recall the etch method used in borehole surveying.
In the etch method, a glass tube coated with acid-sensitive material is used to determine the inclination of a borehole.
Step 2: Identify the acid used. Hydrofluoric acid (HF) reacts with glass and produces an etched mark, which is used to determine the borehole deviation. Hence, \[ \boxed{\text{Hydrofluoric acid}} \] is the correct answer. Therefore, \[ \boxed{(D)} \] is the correct answer.
Step 2: Identify the acid used. Hydrofluoric acid (HF) reacts with glass and produces an etched mark, which is used to determine the borehole deviation. Hence, \[ \boxed{\text{Hydrofluoric acid}} \] is the correct answer. Therefore, \[ \boxed{(D)} \] is the correct answer.
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