Chapter 4

Question 1

What are the purposes of inspection and testing?

Answer 1

Identifying existing and potential problems
Evaluating detected problems
Determining location of problems
Providing information about problems

Question 2

What are the types of collection system problems

Answer 2

Design related 
Improper installation 
Inadequate ordinances
Improper inspection
Changing populations 
Disaster

Question 3

Define water table

Answer 3

The upper surface of the zone of saturation of groundwater in an unconfined acquifer.

Question 4

Define surcharge

Answer 4

Sewers are surcharges when the supply of water to be carried is greater than the capacity of the pipes to carry the flow.

Question 5

Define infiltration

Answer 5

Water entering the collection system through deteriorated or broken pipes or joints.

Question 6

Define inflow.

Answer 6

Water that is not polluted and should uh led be in a stormwater drainage system.

Question 7

Define S.S.O.

Answer 7

Sanitary Sewer Overflow.

Question 8

Define ponding

Answer 8

Surface water that accumulates at manholes.

Question 9

Define exfiltration.

Answer 9

Leakage of wastewater out of the collection system through broken or damaged pipes and manholes.

Question 10

What are sources of I / I?

Answer 10

Illicit connections to the public sewer. Downspouts, basement dumps foundation drains, breaks on pipes, open joints.

Question 11

Define lateral connection

Answer 11

Typically a small diameter pipe that connects to the main line.

Question 12

What is the number of operators required to enter a manhole?

Answer 12

3

Question 13

What is the frequency of manhole inspections?

Answer 13

1- 5 years.

Question 14

Define offset.

Answer 14

A pipe joint that has lost its bedding support causing one of the pipe sections to drop and the pipes no longer line up properly.

Question 15

Define lamping.

Answer 15

Using a light or reflected sunlight to inspect a sewer between two adjacent manholes.

Question 16

What are winches used for.

Answer 16

Pulls camera on demand and for specialized use when self propelled transporters are not.suitable.

Question 17

What is the typical number of staff required for CCTV operation

Answer 17

2

3 if in traffic.

Question 18

Which direction should the camera move

Answer 18

Direction of flow.

Question 19

Define offset joints.

Answer 19

Horizontal offset is when the joint section has moved out of alignment.

Vertical offsets are drops or jumps on joints.

Question 20

Define smoke tesfing.

Answer 20

testing. Non toxic smoke filled air down a manhole and sewer pipe and wait for visible smoke.

Question 21

Define cured in place pipe.

Answer 21

Trenchless pipe rehabilitation that lines existing pipe.

Question 22

Define dye testing.

Answer 22

Simple cost effective way to determine if sewer facilities are connected to wastewater collection system.

Question 23

What is the recommended manhole inspection schedule.

Answer 23

1-5 years.