Sewage and Stormwater Removal review

Centrifugal pumps are lubricated by _____.

• hydraulic fluid

• air

• oil

• water

The height of the low-level mark in the bottom of a stormwater sump must be no less than _____.

• 6 inches

• 8 inches

• 10 inches

• 12 inches

Probe switches are also called (a)   .

An impeller can be forced to rotate in the wrong direction due to __________.

• low pressure

• an electrical short

• alternated current

• backflow

In a pneumatic ejector, compressed air is allowed to escape through a __________.

• brass gate valve

• plastic butterfly valve

• rubber diaphragm exhaust valve

• latex diaphragm inlet check valve

Pumps that automatically fill with water before operating are called __________.

• self-priming

• auto-priming

• dry-running

• self-running

Pumps and pits that move sewage up to a higher-level sewer line are called ____.

• uplifts

• elevation units

• lift stations

• boosters

Stormwater runoff from paved areas can be directed into storm sewers or into ____.

• tempering basins

• ponds or tanks

• relief reservoirs

• overflow structures

Another term for a sewage pump is ____.

• ejector

• centrifuge

• turbine

• injector

To prevent air from locking a pump, drill a 3/16-inch-diameter hole ____.

• ¼ inch above the pump discharge connection

• ½ inch above the pump inlet connection

• 2 inches above the pump discharge connection

• 2 inches above the pump inlet connection