Comprehensive Practice 2026-2027
Frequently Tested Exam Questions With
Verified Multiple Choice and Conceptual
Actual 100% Correct Detailed Answers
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1. Doubling the diameter of a pipe will _______.
ANSWER Increase the area by four times
2. 40 degrees Celsius is equal to _______ degrees Fahrenheit.
(1.8 x C) + 32=F; (F-32)/1.8= C
ANSWER 104
3. The sides of a right triangle are 3 feet and 4 feet. The hypotenuse would be
approximately _______ feet.
ANSWER 5
4. If a triangle has sides measuring 3, 4, and 5 feet, it must have _______
degree angle between short sides.
ANSWER 90
,5. An outdoor shower installed on the premises ______
ANSWER Shall be connected to an approved drainage system per UPC
requirements
6. Burred ends of all pipe and tubing shall be _______
ANSWER Reamed to the full bore of the pipe or tube
7. Piping, fixtures, or equipment that are installed so that they interfere with
normal operation and use of windows or doors shall be______.
ANSWER Relocated to avoid interference
8. Potable water systems installed with dead legs shall be provided with
_______
ANSWER A method of flushing the dead leg
9. The enlargement of a 3" closet bend or stub to 4" _______
ANSWER Shall not be considered an obstruction
10.If water or waste piping is installed outside of a building, in attics or crawl
spaces, or in an exterior wall _______
ANSWER It shall be permitted provided adequate provisions are made to
protect such pipe from freezing.
,11.Plastic and copper piping penetrating a framing member to within _______
of the exposed framing shall be protected by steel nail plates.
ANSWER 1"
12.Hanger rod sizes supporting 1/2" to 4" piping shall not be smaller than
_______.
ANSWER 3/8"
13.Mechanical devices may be used to complete backfilling where covering
above any piping is at least _______ inches.
ANSWER 12
14.Voids around piping passing through concrete floors on the ground shall be
_______.
ANSWER Sealed
15.It is permitted to drill and tap a vent pipe to install an indirect waste pipe.
True or False?
ANSWER False
16.All pipe, fittings, traps, fixtures, materials, and devices used in plumbing
systems shall be______
ANSWER All of the above
, 17.Sleeves shall be provided to protect all piping passing through _______ and
_______.
ANSWER Concrete and Masonry
18.Plumbing piping shall not be directly embedded in _______
ANSWER concrete or masonry
19.Two- inch and larger copper pipe needs to be supported horizontally every
_______ feet.
ANSWER 10
20.Schedule 40 PVC and ABS DWV pipe must be supported horizontally every
_______ feet.
ANSWER 4
21.Cast-iron hubless pipe over 4 feet in length, must be supported horizontally
at _______.
ANSWER Every joint
22.PEX tubing, 1" and smaller, needs to be supported horizontally every
_______ inches
ANSWER 32