IRC RESIDENTIAL PLUMBING REAL EXAM
PRACTICE QUESTIONS WITH VERIFIED
SOLUTIONS LATEST
According to the InterNACHI Standards of Practice, the inspector is required to
_______ all the toilets.
unbolt and lift use flush
clean ---- ANSWER----flush
Determining the location of the main water supply shut-off valve is _____ the
scope of a home inspection.
not part of beyond within ----
ANSWER----within
T/F: The inspector must examine a home for polybutylene plumbing. ----
ANSWER----False
Acrylonitrile butadiene styrene is sometimes abbreviated as:
ABS
A-S Level
Butadiene Mix ---- ANSWER----ABS
Page 1 of 62
,2|Page
The unobstructed vertical distance through the free atmosphere between an
outlet and the rim best describes ___________.
an air gap in the drainage system a connection problem an indirect
drainage space the best way to vent contaminated water ---- ANSWER----
an air gap in the drainage system
T/F: Contamination can affect water's potability. ---- ANSWER----True
Air-admittance valves protect traps from _________.
clogging leaking admitting air into the vent pipe siphonage
admitting water into the drainpipe ---- ANSWER----siphonage
Where do gasses escape a sanitary drainage system?
a supply vent a vent stack an air-admittance
valve a sewer drainpipe ---- ANSWER----a
vent stack
A lavatory is __________.
a bathroom with a toilet but no sink any type of sink a bathroom or
washroom sink ---- ANSWER----a bathroom or washroom sink
2|Page
,An anchoring ring that is secured to the floor is a __________.
wax ring device water closet flange toilet ring
---- ANSWER----water closet flange
A toilet or commode is referred to in plumbing standards as a ________.
water-flushing device water closet toilet fixture toilet receptacle ----
ANSWER----water closet
The flow of liquids in reverse of its intended path describes ________.
contamination flow-back backflow gravitational mass equilibrium ----
ANSWER----backflow
Hot water is ___________.
water at a temperature of 120° F or higher always on the right side
when facing the fixture water at a temperature between 85° F and
110° F water at a temperature of 110° F water at a temperature of
110° F or higher ---- ANSWER----water at a temperature of 110° F or
higher
There should be a space of at least _______ in front of the water closet, lavatory
and bidet to any wall, fixture and door.
18 inches
1 foot
Page 3 of 62
, 4|Page
15 inches
21 inches
1-1/2 crown weir depth an arm's length ---
- ANSWER----21 inches Closet bolts are
often made of ______ because they resist
corrosion.
aluminum
brass copper phosphate chromed galvanized
steel plated 5/8-inch iron recycled green
materials ---- ANSWER----brass
The waste from an automatic clothes washer must discharge its water through
a(n) ________ into a standpipe or into a laundry tub.
air-admittance vent
automatic check valve
1-1/2-inch diameter discharge hose air
break or air gap trap seal outlet ----
ANSWER----air break or air gap
If a standpipe for an automatic clothes washer is used, the standpipe and its trap
should be at least ___ inches in diameter.
3
1-1/4
4|Page
PRACTICE QUESTIONS WITH VERIFIED
SOLUTIONS LATEST
According to the InterNACHI Standards of Practice, the inspector is required to
_______ all the toilets.
unbolt and lift use flush
clean ---- ANSWER----flush
Determining the location of the main water supply shut-off valve is _____ the
scope of a home inspection.
not part of beyond within ----
ANSWER----within
T/F: The inspector must examine a home for polybutylene plumbing. ----
ANSWER----False
Acrylonitrile butadiene styrene is sometimes abbreviated as:
ABS
A-S Level
Butadiene Mix ---- ANSWER----ABS
Page 1 of 62
,2|Page
The unobstructed vertical distance through the free atmosphere between an
outlet and the rim best describes ___________.
an air gap in the drainage system a connection problem an indirect
drainage space the best way to vent contaminated water ---- ANSWER----
an air gap in the drainage system
T/F: Contamination can affect water's potability. ---- ANSWER----True
Air-admittance valves protect traps from _________.
clogging leaking admitting air into the vent pipe siphonage
admitting water into the drainpipe ---- ANSWER----siphonage
Where do gasses escape a sanitary drainage system?
a supply vent a vent stack an air-admittance
valve a sewer drainpipe ---- ANSWER----a
vent stack
A lavatory is __________.
a bathroom with a toilet but no sink any type of sink a bathroom or
washroom sink ---- ANSWER----a bathroom or washroom sink
2|Page
,An anchoring ring that is secured to the floor is a __________.
wax ring device water closet flange toilet ring
---- ANSWER----water closet flange
A toilet or commode is referred to in plumbing standards as a ________.
water-flushing device water closet toilet fixture toilet receptacle ----
ANSWER----water closet
The flow of liquids in reverse of its intended path describes ________.
contamination flow-back backflow gravitational mass equilibrium ----
ANSWER----backflow
Hot water is ___________.
water at a temperature of 120° F or higher always on the right side
when facing the fixture water at a temperature between 85° F and
110° F water at a temperature of 110° F water at a temperature of
110° F or higher ---- ANSWER----water at a temperature of 110° F or
higher
There should be a space of at least _______ in front of the water closet, lavatory
and bidet to any wall, fixture and door.
18 inches
1 foot
Page 3 of 62
, 4|Page
15 inches
21 inches
1-1/2 crown weir depth an arm's length ---
- ANSWER----21 inches Closet bolts are
often made of ______ because they resist
corrosion.
aluminum
brass copper phosphate chromed galvanized
steel plated 5/8-inch iron recycled green
materials ---- ANSWER----brass
The waste from an automatic clothes washer must discharge its water through
a(n) ________ into a standpipe or into a laundry tub.
air-admittance vent
automatic check valve
1-1/2-inch diameter discharge hose air
break or air gap trap seal outlet ----
ANSWER----air break or air gap
If a standpipe for an automatic clothes washer is used, the standpipe and its trap
should be at least ___ inches in diameter.
3
1-1/4
4|Page
