NHIE 100 QUESTIONS EXAM PREP
– MOCK TEST QUESTIONS AND
ANSWERS KEY.
The house you are inspecting currently has a gas-fired furnace or boiler. Each of the
following clues may indicate that the house also has an abandoned buried fuel oil
storage tank EXCEPT
A. small diameter copper tubes emerging from the inside of the foundation wall or the
floor
near the furnace or boiler
B. an approximately 1 % inch diameter vent pipe outside coming from underground up
against the foundation
C. the brick chimney serving the furnace or boiler has deteriorated mortar joints at the
bottom
D. your knowledge that the neighborhood h ad or still h as some houses served by oil
heat - Answer-C
While inspecting a heat pump in the cooling mode, you measure a 28 degrees F
temperature differential between the interior supply and return air. You should su spect
A. an exterior fan running too slowly.
B. an overheating compressor.
C. a dirty filter.
D. a thermostat set too low. - Answer-C
What is the MINIMUM electrical service drop clearance from a residential driveway?
A. 12 feet
B. 13 feet
C. 15 feet
D. 18 feet - Answer-A
The reason a dielectric union would be used in plumbing distribution pipes is to
A. ensure that the grounding conductor has a secure connection.
B. separate two dissimilar metals to prevent corrosion.
C. isolate any electrical wires touching the supply pipes.
D. bond the hot and cold water pipes. - Answer-B
A basin makes a gurgling sound at the end of draining the fixture. This may be due to
A. improperly supported pipes.
B. inadequate venting.
C. an undersized drain pipe.
D. improper drain slope. - Answer-B
, Condensation between glass layers of thermal pane windows indicates the need to
A. repair or replace sealant.
B. repair or clean breather holes.
C. replace glazing, sash, or window.
D. replace fhe interior pane. - Answer-C
Dielectric unions
A. accommodate pipe expansion.
B. are undesirable and indicate a problem.
C. prevent galvanic action.
D. help maintain electrical grounding of pipes. - Answer-C
The MINIMUM clearance between a wood stove single wall vent connector and
combustible materials should be
A. 3 inches.
B. 9 inches.
C. 18 inches.
D. 36 inches. - Answer-C
Garage door opener electronic eye sensors are properly installed when facing each
other
A. 1 to 3 inches above the garage floor.
B. 4 to 6 inches above the garage floor.
C. 7 to 10 inches above the garage floor.
D. 11 to 15 inches above the garage floor. - Answer-B
Capillary tubes are part of the
A. evaporator coil.
B. heat exchanger.
C. condenser coil.
D. compressor discharge. - Answer-A
As a lintel over doors and windows in a masonry wall rusts it may cause
A. the window glass to crack
B. the wall at the top to push out.
C. cracks at the tops of openings.
D. the lintel to rotate and displace the brick. - Answer-C
Roof truss uplift can cause cracks to form
A. above exterior doors and windows.
B. at interior wall/ceiling intersections.
C. in bottom chords of roof trusses.
D. in top chords of roof trusses. - Answer-B
– MOCK TEST QUESTIONS AND
ANSWERS KEY.
The house you are inspecting currently has a gas-fired furnace or boiler. Each of the
following clues may indicate that the house also has an abandoned buried fuel oil
storage tank EXCEPT
A. small diameter copper tubes emerging from the inside of the foundation wall or the
floor
near the furnace or boiler
B. an approximately 1 % inch diameter vent pipe outside coming from underground up
against the foundation
C. the brick chimney serving the furnace or boiler has deteriorated mortar joints at the
bottom
D. your knowledge that the neighborhood h ad or still h as some houses served by oil
heat - Answer-C
While inspecting a heat pump in the cooling mode, you measure a 28 degrees F
temperature differential between the interior supply and return air. You should su spect
A. an exterior fan running too slowly.
B. an overheating compressor.
C. a dirty filter.
D. a thermostat set too low. - Answer-C
What is the MINIMUM electrical service drop clearance from a residential driveway?
A. 12 feet
B. 13 feet
C. 15 feet
D. 18 feet - Answer-A
The reason a dielectric union would be used in plumbing distribution pipes is to
A. ensure that the grounding conductor has a secure connection.
B. separate two dissimilar metals to prevent corrosion.
C. isolate any electrical wires touching the supply pipes.
D. bond the hot and cold water pipes. - Answer-B
A basin makes a gurgling sound at the end of draining the fixture. This may be due to
A. improperly supported pipes.
B. inadequate venting.
C. an undersized drain pipe.
D. improper drain slope. - Answer-B
, Condensation between glass layers of thermal pane windows indicates the need to
A. repair or replace sealant.
B. repair or clean breather holes.
C. replace glazing, sash, or window.
D. replace fhe interior pane. - Answer-C
Dielectric unions
A. accommodate pipe expansion.
B. are undesirable and indicate a problem.
C. prevent galvanic action.
D. help maintain electrical grounding of pipes. - Answer-C
The MINIMUM clearance between a wood stove single wall vent connector and
combustible materials should be
A. 3 inches.
B. 9 inches.
C. 18 inches.
D. 36 inches. - Answer-C
Garage door opener electronic eye sensors are properly installed when facing each
other
A. 1 to 3 inches above the garage floor.
B. 4 to 6 inches above the garage floor.
C. 7 to 10 inches above the garage floor.
D. 11 to 15 inches above the garage floor. - Answer-B
Capillary tubes are part of the
A. evaporator coil.
B. heat exchanger.
C. condenser coil.
D. compressor discharge. - Answer-A
As a lintel over doors and windows in a masonry wall rusts it may cause
A. the window glass to crack
B. the wall at the top to push out.
C. cracks at the tops of openings.
D. the lintel to rotate and displace the brick. - Answer-C
Roof truss uplift can cause cracks to form
A. above exterior doors and windows.
B. at interior wall/ceiling intersections.
C. in bottom chords of roof trusses.
D. in top chords of roof trusses. - Answer-B
