Air supplies and fire pump math

The purpose of the air maintenance device is to provide a _________ air supply to the system

• Regulated and filtered

• Regulated and restricted

• Warm and moist

• Regulated and full flow

The purpose of the fast fill valve on an air maintenance device is to ______?

• Repressurise the system quickly

• Allow the system to trip more quickly

• Drain the system quicker

• Fill the system with water when testing

One reason nitrogen is used in lieu of air is________?

• It puts out the fire quicker

• It’s cheaper

• It helps prevent corrosion

• It plugs leaks in the system piping

The “cut in” pressure on a pressure switch is when______?

• The valve trips

• The air compressor starts

• The fire reaches the test connection

• The compressors stops

When installing a tank mounted compressor with isolation pads, it’s important to______?

• Torque all bolts to 90lbs

• Draw the bolts tight to keep the compressor from moving

• Not to draw the bolts too tight

• Use a thread locking compound on all bolts

The minimum pipe size for an air supply is?

• 1”

• Half the size of the riser pipe

• 1/2”

• 3/4”

In a differential dry valve, the regulator on the air maintenance device should set?

• 10 psi above the trip pressure

• At 30 pounds

• At 40 pounds

• 20 psi above the trip pressure

The air supply piping for a dry valve should be installed

• Below the clapper

• Above the priming water level

• In the intermediate chamber

• Vertical

The air supply shall repressurize the system within

• 30 minutes

• 30 minutes and 60 minutes for refrigerated spaces

• 20 minutes

• According the manufacturers recommendations

Multiple dry systems can be maintained by a single air maintenance device

• True

• False