Backflow due to siphonage occurs: correct answers When negative pressure developes
12 inches of water in a water column has what pressure on the bottom? correct answers .433 psi
What size pipe is used to feed a fire hydrant on private property? correct answers 6 inch
The last support hanger on a fire sprinkler branch on 1 inch nominal pipe size may be no more
than _____ from the end. correct answers 36 inches
Strainer plates on drain inlets shall be designed and installed so that no opening is greater than
___ in the least dimension. correct answers 1/2 inch
What type of pipe joint connection is not permitted in gas line piping? correct answers
compression
What is the number of square inches of the sidewall area of a seepage pit that measures 6 feet
across and 14 feet deep? correct answers 37,981.44 square inches
According to OSHA, ladders (or steps) are required in all trenches or ditches at _____ feet or
more in depth for an adequate means of exit. correct answers 4
The sidewalls of a septic tank shall extend no less than ______ inches above the liquid depth.
correct answers 9
Which of the following valve type shall be installed at each building water supply line? correct
answers Full open gate
, Which of the following is required of a clean out cap located in a walkway? correct answers
Shall have a countersunk plug
The last support hanger on a fire sprinkler branch of 1 1/4 inch nominal pipe size may be no
more than _____ from the end. correct answers 48 inches
What minimum height can a LP gas furnace be installed in a public garage? correct answers 1
feet above the garage door.
What is the name for the inside bottom elevation of a sewer line or drain pipe? correct answers
invert
Polybutylene pipe may be used in hot water piping of hydronic heating systems water when the
water in the pipe does not exceed: correct answers 180 degrees at 100 psi
The failure of a contractor to notify Blue Stake prior to excavation may liable him responsible
for damages and subject to how much of a fine? correct answers $5,000.00
The distance between 2 pipes running in parallel is called the ______. correct answers Spread
The Corporation Commission has assigned color codes to identify the location of underground
facilities. What color identifies gas distribution and transmission? correct answers high visibility
safety yellow
Which of the following is not allowed in building interior plumbing (water distribution)? correct
answers PVC
What is the minimum size drain pipe for a water heater pan? correct answers 3/4 inch