Chapter 8

Question 1

Define cavitation

Answer 1

Formation and collapse of bubbles on impeller

Question 2

Define dry well

Answer 2

Dry compartment of lift station

Question 3

Define entrain

Answer 3

Trap bubbles in water

Question 4

Define flat

Answer 4

Length of one side of nut

Question 5

Define force .ain

Answer 5

Pipe that Carrie’s wastewater from discharge side of pump

Question 6

Define head

Answer 6

Verticle distance of water above set point

Question 7

Define impeller

Answer 7

Rotating set of vanes in pump

Question 8

Pneumatic injector

Answer 8

Pump using air

Question 9

Define volute

Answer 9

Spiral shaped casing that surrounds the pump

Question 10

Define wet well

Answer 10

Tank in which wastewater collects

Question 11

What are most common pumps in lift station s

Answer 11

Centrifugal

Pneumatic

Question 12

Define ARV

Answer 12

Air Release Valve

Question 13

What are flow capacities measured in

Answer 13

G.P.M.

Question 14

Define cavitation

Answer 14

Caused by excessive speed

Question 15

How many classes of GFCI

Answer 15

Two
Class A
Class B

Question 16

What is MCC

Answer 16

Motor Xontrol Center

Question 17

Define P.L.C.

Answer 17

Programmable Logic Control

Question 18

What are the 2 types of pumps used in lift stations

Answer 18

Positive displacement

Kinetic

Question 19

Define SCADA

Answer 19

Supervisory Control and Data Acquisition

Question 20

What are two phases of maintenance programs

Answer 20

Scheduling

Performing Work

Question 21

What are hazards associated with entering loft station wet wells

Answer 21

Oxygen levels

Toxic gasses