# Dimensional analysis - Fluid Mechanics

**Q. Which of the following statements are true for dimensional analysis?**

1. The functional relationship between dependent and non-dependent variables can be expressed into dimensionless terms by dimensional analysis

2. In model testing, it reduces the number of variables into three numbers

3. It is used to change the theoretical equation into dimensionless form

4. It helps to convert the units of quantities from one system to another system*- Published on 04 Aug 15***a.** (1), (2) and (3)

**b.** (2), (3) and (4)

**c.** (1), (3) and (4)

**d.** (1), (2), (3) and (4)

**ANSWER: (1), (2), (3) and (4)**