When performing a yield test, what is the difference between a step-drawdown test and a constant-rate test?

When performing a yield test, what is the difference between a step-drawdown test and a constant-rate test?

• A. Constant-rate maintains a fixed flow to study drawdown behavior.
• B. Both tests use the same method; there is no difference.
• C. Step-drawdown increases drawdown gradually with measured response.
• D. Step-drawdown test uses variable water quality; constant-rate uses fixed water quality.

Answer: (C)