Deck 21: Ejector Systems

Question 1

If a sewage pump or ejector serves a single-family dwelling, it must be capable of passing a solid at least 1½ inches in diameter and have a ____ minimum discharge pipe size.

A)1½-inch
B)2-inch
C)3-inch
D)4-inch

Answer 1

B

Question 2

If a sewage pump or ejector receives discharge from either a water closet or urinal, it must have a minimum capacity of ____ gallons per minute.

A)10
B)15
C)20
D)25

Answer 2

C

Question 3

The three model codes require that sewage pumps and ejectors have alarms that are audible, visual, or a combination of both for the high-level limit.

Answer 3

True

Question 4

The vent for a pneumatic ejector must be vented separately to the outdoors.

Question 5

If a sewage pump or ejector serves a commercial building, it must be capable of passing a 2-inch diameter solid and have a _____ minimum discharge pipe size.

A)2-inch
B)3-inch
C)4-inch
D)6-inch

Question 6

Sewage pumping stations are not prone to blockages and require little maintenance.

Question 7

Which of the following is NOT a factor in the selection of a pump?

A)volume of material to be displaced
B)height the material must be lifted
C)average rate of rainfall
D)power supply available

Question 8

_______ are installed as close to the pump as possible so that components can be easily removed from the system.

A)Caps
B)Tees
C)Elbows
D)Unions

Question 9

Full-ported check valves installed in sewage systems to prevent backflow are called __________.

A)RPZs
B)atmospheric-type vacuum breakers
C)double-check valve assemblies
D)backwater valves

Question 10

In which type of basin are the pump and fluid sensors are submerged in the waste?

A)dry
B)wet
C)septic
D)cistern

Question 11

Pneumatic pumps have limited passageways and can become fouled by solid objects, so rotating pumps are a practical solution.