Star Exam

What device(s) are used to test the specific gravity of an antifreeze solution?

• Refractomer or Hydrometer

• Calibrated Gauge

• Ohm Meter

• Multi-meter

For Antifreeze systems with a capacity greater than 150 gal., what must be added for every 100 gals?

• An additional test connection

• Expansion Tank

• Extra Control Valve

• Extra pressure gauge

A listed ___ relief valve is permitted in lieu of an expansion chamber if the antifreeze system capacity does not exceed ___ gals ?

2 Answers

• 1/2" 40

• 1/4" 25

• 1" 50

• 3/4" 100

What are the 2 types of Antifreeze solutions used if sprinklers are supplied by potable water?

• Propylene glycol or Glycerin

• -20 degrees mixed

• Expansion Tank Backflow preventor

• Check valve or Backflow preventor

What information does NOT have to be listed on an antifreeze system placard?

• Manufacturer of Solution

• Type of Solution

• Concentration of Solution

• Date of Solution

A ___ ___ sprinkler system is a sprinkler system that immediately discharges water through a fused head.

• Wet Pipe

• Dry Pipe

• Deluge System

• Pre Action

The size orifice that must be installed in a wet system Inspector’s Test is?

• Smallest used in the system

• 1 / 2"

• 5.6K

• Largest used in the system

The size orifice to be installed in a dry system’s inspector’s test is ____.

• Any size used in the system

• 1 / 2"

• 5.6K

• 1" opening

A paddle type flow switch is acceptable to be installed in a dry system.

True or False

• False

• True

A ______ sprinkler system will supply water to an open head from 2 directions.

• Wet

• Dry

• Looped