Question

   16.   Which is the first step in a storm sewer design investigation?

a.	project meeting
b.	topographic map
c.	site reconnaissance
d.	local land development ordinance

9. Generally, rainfall is lost in what two processes?

a.	initial losses and infiltration	c.	absorption and initial losses
b.	overland flow and infiltration	d.	overland flow and absorption

5. Which type of flow occurs when headwater depth rises above the inlet crown, tailwater depth is relatively low, and the culvert barrel is relatively short.  Explain your answer

          by filling the blanks.  In this case the culvert acts like hydraulic device_____________

a.	Type A	c.	Type C
b.	Type B	d.	Type D

      6. Which type of flow occurs when the tailwater is above the culvert crown and tailwater is relatively high?  In this case the culvert behaves like hydraulic device_____________

a.	Type A	c.	Type C
b.	Type B	d.	Type D

Answer 1

16. The first step in a storm sewer deisgn investigation is scoping meeting or PROJECT MEETING. (A)

09. Rainfall is lost due to INITIAL LOSSES AND INFILTRATION.(A)

05. TYPE B flow occurs , when headwater depth rises above the inlet crown, tailwater depth is relatively low, and the culvert barrel is relatively short. For this type of fow the inlet becomes submerged and and culvert acts as   like a ORIFICE .Culverts with TYPE B flow usually operate in inlet control. (B)

06.TYPE D flow occurs ,when the tailwater is above the culvert crown and tailwater is relatively high. In this case the culvert acts as PIPE FLOWING FULL and control is at the outlet (D)