**1. According to Kennedy, non-silting and non-scouring velocity is called _____.**

[A] Optimal velocity

[B] Critical velocity

[C] Mean velocity

[D] Average velocity

**Answer: Option B**

**2. For the design of lined canal, the formula commonly used is _____.**

[A] Kennedy’s formula

[B] Lacey’s formula

[C] Manning’s formula

[D] Lindley’s formula

**Answer: Option C**

**3. The general depth of scour calculated by Lacey’s formula in a river represents the depth below the**

[A] maximum flood level in the river

[B] minimum flood level in the river

[C] normal flow water level in the river

[D] existing riverbed level

**Answer: Option A**

**4. Hydraulic mean depth of a canal is the ratio between _____.**

[A] Area of flow section and top water surface width

[B] Area of flow section and the wetted perimeter

[C] Total cross-sectional area and top water surface width

[D] Total cross-sectional area and the wetted perimeter

**Answer: Option B**

**5. Kennedy found the Upper Bari Doab canals _____.**

[A] To be the most economical

[B] Having the highest specific discharge

[C] Having the highest critical velocity ratio

[D] to be non-silting and non-scouring

**Answer: Option D**