INTERNACHI EXAM QUESTIONS AND
ANSWERS
b. end 1 inch above the waste drain line - Correct Answers -A condensate line should
______________.
a. empty directly into the waste drain line
b. end 1 inch above the waste drain line
c. not drain into the waste drain line
d. extend at least 1 inch into the waste drain line
d. 10 - Correct Answers -Metal flashing should be less than ____ feet long to prevent
buckling.
a. 15
b. 12
c. 8
d. 10
b. hyphae - Correct Answers -Mold consists of long, branched, thread-like strings of
cells called ________.
a. chitin
b. hyphae
c. septa
d. conventional forced-air unit - Correct Answers -Most air handlers are part of a(n)
_______________.
a. indirect-flow heat exchanger
b. reverse-flow heat exchanger
c. atmospheric boiler
d. conventional forced-air unit
a. 6 - Correct Answers -Most residential construction requires two separate grounding
electrodes that need to be at least ____ feet apart.
a. 6
b. 18
c. 12
d. 4
a. fixed - Correct Answers -Most residential heating systems are of _______ output.
a. fixed
,b. variable
a. spillage at appliance vents - Correct Answers -Negative pressure within a house may
result in _________.
a. spillage at appliance vents
b. a positive vent pressure
c. increased fuel consumption
d. efficient fuel consumption
a. 6 - Correct Answers -Non-metallic sheathed cable should be installed ___ feet away
from a non-permanent ladder in an attic access where the wiring will not require
physical protection.
a. 6
b. 18
c. 12
d. 3
c. is more efficient than conventional furnaces and uses a secondary heat exchanger -
Correct Answers -A condensing furnace _____________.
a. works like an air conditioner, except that it heats instead of cools
b. is a furnace covered in condensation
c. is more efficient than conventional furnaces and uses a secondary heat exchanger
a. 3 - Correct Answers -A crawlspace should have one vent at least ______ feet from
the corner.
a. 3
b. 2
c. 4
d. 1-1/2
a. effective resistance of the wire is increased, so the fuse can no longer adequately
protect the wire from overheating - Correct Answers -A damaged or nicked wire is a
safety hazard because the ___________________.
a. effective resistance of the wire is increased, so the fuse can no longer adequately
protect the wire from overheating
b. damaged wire may corrode
c. wire's effective diameter has been decreased, thereby decreasing the resistance of
the wire
c. cornice - Correct Answers -A dentil can be found on a _________.
a. dormer window
b. widow's walk
c. cornice
d. turret
,e 3 - Correct Answers -A drainpipe from a catch basin should be at least ____ inches in
diameter.
a5
b4
c 2-1/2
d 3-1/2
e3
a 17-1/2 - Correct Answers -A dryer vent with a 45- and 90-degree elbow should have a
maximum length of _____ feet.
a 17-1/2
b 16
c 14-1/2
d 10
c 24 - Correct Answers -A firewall with a 1-hour rating has a _____-inch minimum
distance for metal electrical outlet boxes installed on opposite sides of the wall.
a 30
b 36
c 24
d 18
b 3 - Correct Answers -A flex line connected to a gas heater may be _____ feet long.
a6
b3
c9
d 12
a with a work space having a width of less than 30 inches - Correct Answers -A forced-
air furnace ____________ describes an incorrect installation.
a with a work space having a width of less than 30 inches
b having a combustion chamber situated 6 inches from a door
c that is isolated from the bedroom or bathroom
d with return-air grilles situated at least 10 feet from combustibles
b barometric damper - Correct Answers -A forced-air heating system that is fueled by oil
is evidenced by the presence of a ___________.
a pressure-temperature gauge
b barometric damper
c condensate line
d sight glass
b 6 - Correct Answers -A foundation supporting wood framing should extend ___ inches
above a finished grade.
a2
b6
, c8
d 12
c. be reported if signs of leakage exist, as this may cause the wall to crack - Correct
Answers -A foundation wall penetration should ____________.
a. never be below grade
b. be repaired with re-pointing cement
c. be reported if signs of leakage exist, as this may cause the wall to crack
d. never be below the frost line
d. 6 - Correct Answers -A garage can have ______ electrical circuits before it's required
to have its own sub-panel.
a. eight
b. two
c. four
d. six
c. bathroom - Correct Answers -A gas water heater shall not be installed in the
___________.
a. living room
b. kitchen
c. bathroom
d. dining room
c, be no more than 10 feet long plus two elbows - Correct Answers -A good rule of
thumb for an oil furnace's exhaust flue is that it should _____________.
a. be about as big in diameter as your thumb
b. run as close as possible to level
c, be no more than 10 feet long plus two elbows
d. be twice as big as the cold-air returns
b. 8 - Correct Answers -A ground rod should be driven a minimum of _____ feet below
grade.
a. 4
b. 8
c. 6
d. 10
d. 4 - Correct Answers -A handrail is required at stairways having ______ or more
steps/treads.
a. 10
b. six
c. two
d. four
ANSWERS
b. end 1 inch above the waste drain line - Correct Answers -A condensate line should
______________.
a. empty directly into the waste drain line
b. end 1 inch above the waste drain line
c. not drain into the waste drain line
d. extend at least 1 inch into the waste drain line
d. 10 - Correct Answers -Metal flashing should be less than ____ feet long to prevent
buckling.
a. 15
b. 12
c. 8
d. 10
b. hyphae - Correct Answers -Mold consists of long, branched, thread-like strings of
cells called ________.
a. chitin
b. hyphae
c. septa
d. conventional forced-air unit - Correct Answers -Most air handlers are part of a(n)
_______________.
a. indirect-flow heat exchanger
b. reverse-flow heat exchanger
c. atmospheric boiler
d. conventional forced-air unit
a. 6 - Correct Answers -Most residential construction requires two separate grounding
electrodes that need to be at least ____ feet apart.
a. 6
b. 18
c. 12
d. 4
a. fixed - Correct Answers -Most residential heating systems are of _______ output.
a. fixed
,b. variable
a. spillage at appliance vents - Correct Answers -Negative pressure within a house may
result in _________.
a. spillage at appliance vents
b. a positive vent pressure
c. increased fuel consumption
d. efficient fuel consumption
a. 6 - Correct Answers -Non-metallic sheathed cable should be installed ___ feet away
from a non-permanent ladder in an attic access where the wiring will not require
physical protection.
a. 6
b. 18
c. 12
d. 3
c. is more efficient than conventional furnaces and uses a secondary heat exchanger -
Correct Answers -A condensing furnace _____________.
a. works like an air conditioner, except that it heats instead of cools
b. is a furnace covered in condensation
c. is more efficient than conventional furnaces and uses a secondary heat exchanger
a. 3 - Correct Answers -A crawlspace should have one vent at least ______ feet from
the corner.
a. 3
b. 2
c. 4
d. 1-1/2
a. effective resistance of the wire is increased, so the fuse can no longer adequately
protect the wire from overheating - Correct Answers -A damaged or nicked wire is a
safety hazard because the ___________________.
a. effective resistance of the wire is increased, so the fuse can no longer adequately
protect the wire from overheating
b. damaged wire may corrode
c. wire's effective diameter has been decreased, thereby decreasing the resistance of
the wire
c. cornice - Correct Answers -A dentil can be found on a _________.
a. dormer window
b. widow's walk
c. cornice
d. turret
,e 3 - Correct Answers -A drainpipe from a catch basin should be at least ____ inches in
diameter.
a5
b4
c 2-1/2
d 3-1/2
e3
a 17-1/2 - Correct Answers -A dryer vent with a 45- and 90-degree elbow should have a
maximum length of _____ feet.
a 17-1/2
b 16
c 14-1/2
d 10
c 24 - Correct Answers -A firewall with a 1-hour rating has a _____-inch minimum
distance for metal electrical outlet boxes installed on opposite sides of the wall.
a 30
b 36
c 24
d 18
b 3 - Correct Answers -A flex line connected to a gas heater may be _____ feet long.
a6
b3
c9
d 12
a with a work space having a width of less than 30 inches - Correct Answers -A forced-
air furnace ____________ describes an incorrect installation.
a with a work space having a width of less than 30 inches
b having a combustion chamber situated 6 inches from a door
c that is isolated from the bedroom or bathroom
d with return-air grilles situated at least 10 feet from combustibles
b barometric damper - Correct Answers -A forced-air heating system that is fueled by oil
is evidenced by the presence of a ___________.
a pressure-temperature gauge
b barometric damper
c condensate line
d sight glass
b 6 - Correct Answers -A foundation supporting wood framing should extend ___ inches
above a finished grade.
a2
b6
, c8
d 12
c. be reported if signs of leakage exist, as this may cause the wall to crack - Correct
Answers -A foundation wall penetration should ____________.
a. never be below grade
b. be repaired with re-pointing cement
c. be reported if signs of leakage exist, as this may cause the wall to crack
d. never be below the frost line
d. 6 - Correct Answers -A garage can have ______ electrical circuits before it's required
to have its own sub-panel.
a. eight
b. two
c. four
d. six
c. bathroom - Correct Answers -A gas water heater shall not be installed in the
___________.
a. living room
b. kitchen
c. bathroom
d. dining room
c, be no more than 10 feet long plus two elbows - Correct Answers -A good rule of
thumb for an oil furnace's exhaust flue is that it should _____________.
a. be about as big in diameter as your thumb
b. run as close as possible to level
c, be no more than 10 feet long plus two elbows
d. be twice as big as the cold-air returns
b. 8 - Correct Answers -A ground rod should be driven a minimum of _____ feet below
grade.
a. 4
b. 8
c. 6
d. 10
d. 4 - Correct Answers -A handrail is required at stairways having ______ or more
steps/treads.
a. 10
b. six
c. two
d. four
