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WorksheetsAir Supplies
Total questions: 10
Worksheet time: 5mins
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
restricted and full pressure
The purpose of the fast fill control valve on the air maintenance device is to_______.
re-pressurize the dry system more quickly with greater airflow
allow the dry system to trip more quickly
blow out the system piping, when there is an obstruction
fill the system with water more quickly when testing
drain the system piping more quickly
The bypass valve on the air maintenance device are_______.
normally closed when the system is in service
partially open when the system is in service, to provide a restriction in the air supply
normally open when the system is in service
only opened during fire conditions
only opened when testing the system alarms
Nitrogen may be used in lieu of air to pressurize dry and preaction systems. One reason why nitrogen is used because_________.
it helps put out the fire more quickly
it allows the system to trip more quickly
it will plug leaks in the system piping
it helps prevent corrosion of the system piping
it prevents false tripping of the valve
The cut-in pressure for a compressor pressure switch is defined as the pressure when ________.
the compressor starts
the valve trips
water reaches the test connection
the sprinkler fuses
the fire starts
When installing a tank-type compressor with isolator pads _______.
torque the bolts to 90-ft lbs.
do not draw the bolts tight
install a locking compound, and torque the bolts tight.
torque the bolts to keep the pads from absorbing vibrations
draw the bolts tight to keep the compressor from moving
When installing the compressor and isolators are used__________.
the piping must be restrained from movement with rigid type
hangers
extra heavy wall piping should be used to prevent air piping
breakage
a flexible hose should be installed between the compressor and service piping
there must be 3 feet of clear space around compressor to allow for movement
a housekeeping pad must be poured for the compressor
The air compressor utilized to provide the air supply for the system is_________.
required to be listed
is not required to be listed
must be specifically listed for metallic sprinkler piping
must be listed for industrial use
must be listed for air maintenance of fire systems
The minimum pipe size for air supply piping is_______.
1/4"
1/2"
3/4"
1"
1 1/2"
The compressor pressure switch uses__________ pressure to turn the compressor on and off, by opening and closing electrical contacts that control the power to the compressor.
air
water
tripping force
static
residual
