NATIONAL HOME INSPECTOR CORE 2026 MAIN
QUESTIONS AND ANSWERS SURE A+
✔✔An opening of ____ square inches should be provided for gas dryers located in a
closet.
A. 50
B. 10
C. 30
D. 100 - ✔✔D. 100
✔✔Is an exhaust fan required in a kitchen? - ✔✔No
✔✔A copper-steel connection undergoes a/an?
A. Hydrostatic reaction
B. Electronic reaction
C. Hydrostasis reaction
D. Electrolytic reaction - ✔✔D. Electrolytic reaction
✔✔What causes water hammer?
A. Backpressure from water
B. Loose pipes, fast closing valves and hydrostatic shock
C. Oversized piping system
D. Undersized piping system - ✔✔B. Loose pipes, fast closing valves and hydrostatic
shock
✔✔The recommended slope for waste plumbing is typically?
A. 1/4" Per foot
B. 1/8" Per foot
,C. 3/4" Per foot
D. 1" Per foot - ✔✔A. 1/4" Per foot
✔✔While inspecting a bathroom, the inspector finds sewer odors, gurgling and slow
drains. These could be an indication of what?
A. Venting problems
B. Old piping
C. Deteriorating piping
D. This is common - ✔✔A. Venting problems
✔✔What is the min. extension and diameter of a vent pipe through the roof line to
prevent frost/snow closure?
A. 1" daim and 3" above snow line
B. 3" diam. and 6" above snow line
C. 6" diam and 8" above snow line
D. 1/2" diam and 1" above snow line - ✔✔B. 3" diam. and 6" above snow line
✔✔What is a wet vent?
A. A vent for a water main
B. A vent used for waste
C. A vent that also serves as a drain
D. A vent that only serves for the flow of water - ✔✔C. A vent that also serves as a drain
✔✔Where must a temp. relief valve be installed in a water heater?
A. Within the top 6" of the tank
B. Within the bottom 6" of the tank
C. Within the top 8" of the tank
D. Within the bottom 8" of the tank - ✔✔A. Within the top 6" of the tank
✔✔Temp/pressure relief valves are typically rated at what psi and what temperature?
A. 50 psi and 100 F
B. 100 psi and 180 F
C. 150 psi and 210 F
D. 250 psi and 400 F - ✔✔C. 150 psi and 210 F
✔✔What is the max. length of a flex gas connector to a dryer or range?
A. 6'
B. 8'
C. 10'
, D. No max required - ✔✔A. 6'
✔✔If a natural gas appliance is changed to propane gas you need?
A. An adapter
B. A permit
C. A smaller orifice
D. A larger orifice - ✔✔C. A smaller orifice
✔✔How much water does a modern toilet discharge into the waste system?
A. 1.6 GPF
B. 2 GPF
C. 4 GPF
D. 1.5 GPF - ✔✔A. 1.6 GPF
✔✔Copper and galvanized steel can be jointed by what method?
A. Di-electric unions and brass converter fittings
B. Copper converter fittings
C. PVC converter fittings
D. They cannot be jointed - ✔✔A. Di-electric unions and brass converter fittings
✔✔While inspecting an appliance, the inspector finds that a flexible appliance connector
has been cut.
A. This is acceptable and should not be reported
B. A flexible connection is not permitted
C. A flexible connector cannot be cut
D. The inspector should recommend a plumber inspect the connector - ✔✔C. A flexible
connector cannot be cut
✔✔Two 3' appliance connectors can be connected to make a 6' connection? - ✔✔False
✔✔What kind of connection is necessary to connect a plastic DWV to a cast iron DWV?
A. Hubless
B. Clamp
C. Threaded
D. No specified connection - ✔✔A. Hubless
✔✔While inspecting a storage closet, the inspector finds a water heater.
A. This is acceptable as long as there is no combustible materials in the closet.
QUESTIONS AND ANSWERS SURE A+
✔✔An opening of ____ square inches should be provided for gas dryers located in a
closet.
A. 50
B. 10
C. 30
D. 100 - ✔✔D. 100
✔✔Is an exhaust fan required in a kitchen? - ✔✔No
✔✔A copper-steel connection undergoes a/an?
A. Hydrostatic reaction
B. Electronic reaction
C. Hydrostasis reaction
D. Electrolytic reaction - ✔✔D. Electrolytic reaction
✔✔What causes water hammer?
A. Backpressure from water
B. Loose pipes, fast closing valves and hydrostatic shock
C. Oversized piping system
D. Undersized piping system - ✔✔B. Loose pipes, fast closing valves and hydrostatic
shock
✔✔The recommended slope for waste plumbing is typically?
A. 1/4" Per foot
B. 1/8" Per foot
,C. 3/4" Per foot
D. 1" Per foot - ✔✔A. 1/4" Per foot
✔✔While inspecting a bathroom, the inspector finds sewer odors, gurgling and slow
drains. These could be an indication of what?
A. Venting problems
B. Old piping
C. Deteriorating piping
D. This is common - ✔✔A. Venting problems
✔✔What is the min. extension and diameter of a vent pipe through the roof line to
prevent frost/snow closure?
A. 1" daim and 3" above snow line
B. 3" diam. and 6" above snow line
C. 6" diam and 8" above snow line
D. 1/2" diam and 1" above snow line - ✔✔B. 3" diam. and 6" above snow line
✔✔What is a wet vent?
A. A vent for a water main
B. A vent used for waste
C. A vent that also serves as a drain
D. A vent that only serves for the flow of water - ✔✔C. A vent that also serves as a drain
✔✔Where must a temp. relief valve be installed in a water heater?
A. Within the top 6" of the tank
B. Within the bottom 6" of the tank
C. Within the top 8" of the tank
D. Within the bottom 8" of the tank - ✔✔A. Within the top 6" of the tank
✔✔Temp/pressure relief valves are typically rated at what psi and what temperature?
A. 50 psi and 100 F
B. 100 psi and 180 F
C. 150 psi and 210 F
D. 250 psi and 400 F - ✔✔C. 150 psi and 210 F
✔✔What is the max. length of a flex gas connector to a dryer or range?
A. 6'
B. 8'
C. 10'
, D. No max required - ✔✔A. 6'
✔✔If a natural gas appliance is changed to propane gas you need?
A. An adapter
B. A permit
C. A smaller orifice
D. A larger orifice - ✔✔C. A smaller orifice
✔✔How much water does a modern toilet discharge into the waste system?
A. 1.6 GPF
B. 2 GPF
C. 4 GPF
D. 1.5 GPF - ✔✔A. 1.6 GPF
✔✔Copper and galvanized steel can be jointed by what method?
A. Di-electric unions and brass converter fittings
B. Copper converter fittings
C. PVC converter fittings
D. They cannot be jointed - ✔✔A. Di-electric unions and brass converter fittings
✔✔While inspecting an appliance, the inspector finds that a flexible appliance connector
has been cut.
A. This is acceptable and should not be reported
B. A flexible connection is not permitted
C. A flexible connector cannot be cut
D. The inspector should recommend a plumber inspect the connector - ✔✔C. A flexible
connector cannot be cut
✔✔Two 3' appliance connectors can be connected to make a 6' connection? - ✔✔False
✔✔What kind of connection is necessary to connect a plastic DWV to a cast iron DWV?
A. Hubless
B. Clamp
C. Threaded
D. No specified connection - ✔✔A. Hubless
✔✔While inspecting a storage closet, the inspector finds a water heater.
A. This is acceptable as long as there is no combustible materials in the closet.
