IRC PLUMBING PRACTICE TEST WITH QUESTIONS
AND CORRECT VERIFIED ANSWERS
When main pressure exceeds 80 psi, a(n) _____ must be installed on
the domestic water branch main or riser at the connection to the
water service pipe. -Answer:-approved pressure reducing valve
An approved ______ drain must be installed with shower subpans or
linings with the flange placed flush with the subbase and be
equipped with a clamping ring or other device to make a water-tight
connection between the lining and the drain. -Answer:-flanged
A potable water supply system must be designed and installed in
such a manner as to prevent contamination from ______, solids or
gases being introduced into the potable water supply. -Answer:-
non-potable liquids
Building sewers smaller than _____ must have cleanouts located at
intervals of not more than _____. -Answer:-8 inches, 100 feet
,Drain, waste and vent (DWV) piping in buildings that are of
galvanized wrought-iron or galvanized steel pipe must not be used
underground and must be maintained not less than _____ inches
above ground. -Answer:-6
The maximum allowable distance of a 1 1/2 inch fixture trap from
the vent fitting is ______ feet. -Answer:-6
Trenching installed parallel to footings and walls must not extend
into the bearing plane of a footing or wall. The upper boundary of
the bearing plane is a line that extends downward, at an angle of
_____ from horizontal, from the outside bottom edge of the footing or
wall. -Answer:-45 degrees
The minimum required area and dimension must be measured from
the finished interior dimension at a height equal to the top of the
,threshold and at a point tangent to its centerline and must be
continued to a height not less than _____ inches above the shower
drain outlet. -Answer:-70
P2708.1
A bidet must be equipped with ______ fixture supply fitting. -Answer:-
either an air-gap-type or vacuum-breaker type
Waste receptors must not be installed in _____ or in any inaccessible
or unventilated space such as a closet. -Answer:-concealed spaces
A single trap must be permitted to serve ______ like fixtures limited to
kitchen sinks, laundry tubs and lavatories. -Answer:-1. two; or
2. three
Sillcocks, hose bibbs, wall hydrants and other openings with a hose
connection must be protected by a(n) _____. Exceptions ignored. -
Answer:-1. atmospheric-type breaker; or
2. pressure-type vacuum breaker; or
, 3. permanently attached hose connection vacuum breaker.
What is the minimum pipe support spacing in feet, required for
copper or copper alloy tubing (1 1/2 inch diameter and larger)
installed in a vertical orientation. -Answer:-10
A means to drain the fire sprinkler system must be provided on the
______ side of the water distribution shutoff valve. -Answer:-system
The dishwasher waste line must _____ before connecting to the sink
tailpiece. -Answer:-rise and securely fastened to the underside of
the counter
Which type of traps are prohibited? -Answer:-1. Bell traps; and
2. S traps; and
3. trap designs with moving parts; and
AND CORRECT VERIFIED ANSWERS
When main pressure exceeds 80 psi, a(n) _____ must be installed on
the domestic water branch main or riser at the connection to the
water service pipe. -Answer:-approved pressure reducing valve
An approved ______ drain must be installed with shower subpans or
linings with the flange placed flush with the subbase and be
equipped with a clamping ring or other device to make a water-tight
connection between the lining and the drain. -Answer:-flanged
A potable water supply system must be designed and installed in
such a manner as to prevent contamination from ______, solids or
gases being introduced into the potable water supply. -Answer:-
non-potable liquids
Building sewers smaller than _____ must have cleanouts located at
intervals of not more than _____. -Answer:-8 inches, 100 feet
,Drain, waste and vent (DWV) piping in buildings that are of
galvanized wrought-iron or galvanized steel pipe must not be used
underground and must be maintained not less than _____ inches
above ground. -Answer:-6
The maximum allowable distance of a 1 1/2 inch fixture trap from
the vent fitting is ______ feet. -Answer:-6
Trenching installed parallel to footings and walls must not extend
into the bearing plane of a footing or wall. The upper boundary of
the bearing plane is a line that extends downward, at an angle of
_____ from horizontal, from the outside bottom edge of the footing or
wall. -Answer:-45 degrees
The minimum required area and dimension must be measured from
the finished interior dimension at a height equal to the top of the
,threshold and at a point tangent to its centerline and must be
continued to a height not less than _____ inches above the shower
drain outlet. -Answer:-70
P2708.1
A bidet must be equipped with ______ fixture supply fitting. -Answer:-
either an air-gap-type or vacuum-breaker type
Waste receptors must not be installed in _____ or in any inaccessible
or unventilated space such as a closet. -Answer:-concealed spaces
A single trap must be permitted to serve ______ like fixtures limited to
kitchen sinks, laundry tubs and lavatories. -Answer:-1. two; or
2. three
Sillcocks, hose bibbs, wall hydrants and other openings with a hose
connection must be protected by a(n) _____. Exceptions ignored. -
Answer:-1. atmospheric-type breaker; or
2. pressure-type vacuum breaker; or
, 3. permanently attached hose connection vacuum breaker.
What is the minimum pipe support spacing in feet, required for
copper or copper alloy tubing (1 1/2 inch diameter and larger)
installed in a vertical orientation. -Answer:-10
A means to drain the fire sprinkler system must be provided on the
______ side of the water distribution shutoff valve. -Answer:-system
The dishwasher waste line must _____ before connecting to the sink
tailpiece. -Answer:-rise and securely fastened to the underside of
the counter
Which type of traps are prohibited? -Answer:-1. Bell traps; and
2. S traps; and
3. trap designs with moving parts; and
