TEXAS NHIE- NATIONAL HOME INSPECTOR (NHIE) EXAM | ALL
200+ QUESTIONS AND ANSWERS 2026/2027 | VERIFIED
ANSWERS PLUS RATIONALES | GRADED Q&A
COMPREHENSIVE STUDY GUIDE | VERIFIED LATEST 2027
1. A home inspector is performing a structural evaluation of a single-family home
constructed over a crawlspace. While inspecting the floor framing system, the inspector
observes that a wood girder has a bearing of 2 inches on a masonry pier. According to
standard modern residential building practices, what is the minimum required bearing
length for a wood girder on masonry?
A. 1.5 inches
B. 2.0 inches
C. 3.0 inches
D. 4.0 inches
Answer: C
Rationale: Standard residential construction codes and practice guidelines specify that wood
girders and beams bearing on masonry or concrete must have a minimum bearing length of 3
inches. A 2-inch bearing is insufficient and represents a structural deficiency that requires
reporting and further evaluation by a licensed structural engineer or qualified contractor.
2. During an inspection of an attached garage, an inspector notes that the wall separating
the garage from the living space is framed with wood studs. Which wall assembly detail is
required to meet standard safety and fire-separation criteria for this boundary?
A. 1/2-inch regular drywall on the garage side only
B. 1/2-inch Type X drywall on the living side only
C. 1/2-inch gypsum board applied to the garage side, with penetrations sealed
D. 5/8-inch Type X gypsum board installed on both sides of the framing studs
Answer: C
Rationale: Modern standard fire-separation rules mandate a minimum of 1/2-inch gypsum
board applied to the garage side of the wall separating the garage from the residence. Any
,penetrations through this barrier must also be properly fire-stopped to maintain the
assembly's integrity against smoke and fire transmission.
3. An inspector is evaluating a gas-fired water heater located in a residential garage. The
unit is installed directly on the concrete slab floor. What condition should the inspector
report regarding this installation?
A. The unit is installed correctly provided it has an expansion tank attached
B. The burner ignition source must be elevated a minimum of 18 inches above the garage floor
unless labeled as flammable vapor ignition resistant (FVIR)
C. Gas water heaters are strictly prohibited from being located inside a residential garage space
D. The draft hood must be connected to an active mechanical exhaust fan
Answer: B
Rationale: Ignition sources for gas-fired appliances located in garages must be elevated at
least 18 inches above the floor to lower the risk of igniting heavier-than-air flammable
vapors. An exception applies if the unit is explicitly listed as Flammable Vapor Ignition
Resistant (FVIR), though verifying proper installation height remains a key inspection step.
4. While inspecting the electrical main panel, an inspector observes two neutral conductors
terminating under a single terminal screw on the neutral bus bar. How should the
inspector document this condition?
A. Acceptable practice provided the terminal screw is tightened securely
B. Acceptable practice if the wires are of the same gauge and metal composition
C. Deficient installation commonly referred to as double-tapping, which requires correction
D. Deficient installation only if the neutral bar lacks additional vacant terminal ports
Answer: C
Rationale: Most terminal bus bars are explicitly listed for a single neutral conductor per
terminal screw. Terminating two neutral wires under one screw (double-tapping) can cause
loosening, overheating, and elevated risk of electrical fire or loose neutrals. This condition
should be cited as a safety deficiency.
5. During a roof inspection, the inspector examines an asphalt shingle installation on a roof
deck with a pitch of 3:12. What specific installation method is required for asphalt shingles
on low-slope roofs (2:12 up to 4:12)?
,A. Standard single-layer underlayment applied with a 2-inch overlap
B. Double-layer underlayment or a continuous self-adhering polymer-modified bitumen
membrane
C. Interlocking metal flashing placed beneath every row of asphalt shingles
D. Application of liquid asphalt cement over the entire roof surface before shingling
Answer: B
Rationale: For roof slopes between 2:12 and less than 4:12, standard single-layer
underlayment is inadequate to prevent water intrusion from wind-driven rain or ice
damming. Building standards require a double layer of underlayment or an approved self-
adhering ice/water membrane across the roof deck.
6. An inspector is evaluating the exterior drainage around a house with a slab-on-grade
foundation. Which grade slope away from the foundation wall represents the standard
recommendation for proper site drainage?
A. 1 inch per foot for the first 2 feet
B. 6 inches of fall within the first 10 feet
C. 12 inches of fall within the first 5 feet
D. 2 inches of fall within the first 15 feet
Answer: B
Rationale: To prevent water pooling and foundation damage, standard drainage guidelines
require the ground surface adjacent to the foundation to slope downward a minimum of 6
inches within the first 10 feet (a 5% grade slope), unless restricted by property boundaries or
obstructions where swales are utilized.
7. An inspector locates a subpanel in a hallway closet. Upon opening the dead front, the
inspector notices that the neutral bus bar is bonded to the metal enclosure with a bonding
strap, and the equipment grounding wires share the same bus bar. What should the
inspector report?
A. The installation is fully compliant with electrical codes for remote distribution panels
B. Neutral and equipment grounding conductors must be separated in subpanels, and the
subpanel neutral bus must be isolated from the cabinet
, C. Equipment grounding conductors are not required inside subpanels if the main panel is
grounded
D. Bonding straps are required in all subpanels regardless of location
Answer: B
Rationale: In remote distribution panels (subpanels), the neutral bus bar must remain
unbonded (isolated) from the metal enclosure, and equipment grounding wires must
terminate on a separate grounding bus bar connected to the cabinet. Combining them creates
parallel neutral paths back to the main service, posing a severe shock hazard.
8. While evaluating a gas-fired forced-air furnace, an inspector turns on the thermostat
and observes the main burner ignition. As the circulating blower fan starts up, the burner
flames roll back toward the control compartment and flicker excessively. What is the most
likely cause of this issue?
A. A clogged air filter in the return plenum
B. A cracked or compromised heat exchanger
C. Excess supply air pressure in the duct system
D. An improperly set limit control switch
Answer: B
Rationale: Flame disturbance or flame rollout when the supply blower engages strongly
suggests airflow from the blower plenum entering the combustion chamber through a
cracked or perforated heat exchanger. This is a critical safety defect that exposes occupants
to carbon monoxide and requires immediate professional heating technician evaluation.
9. An inspector is assessing the plumbing vent system of a two-story home. A plumbing
vent pipe terminates through the roof. What is the minimum standard height the vent pipe
must extend above the roof surface in regions not subject to heavy snowfall buildup?
A. 2 inches
B. 6 inches
C. 18 inches
D. 24 inches
Answer: B
200+ QUESTIONS AND ANSWERS 2026/2027 | VERIFIED
ANSWERS PLUS RATIONALES | GRADED Q&A
COMPREHENSIVE STUDY GUIDE | VERIFIED LATEST 2027
1. A home inspector is performing a structural evaluation of a single-family home
constructed over a crawlspace. While inspecting the floor framing system, the inspector
observes that a wood girder has a bearing of 2 inches on a masonry pier. According to
standard modern residential building practices, what is the minimum required bearing
length for a wood girder on masonry?
A. 1.5 inches
B. 2.0 inches
C. 3.0 inches
D. 4.0 inches
Answer: C
Rationale: Standard residential construction codes and practice guidelines specify that wood
girders and beams bearing on masonry or concrete must have a minimum bearing length of 3
inches. A 2-inch bearing is insufficient and represents a structural deficiency that requires
reporting and further evaluation by a licensed structural engineer or qualified contractor.
2. During an inspection of an attached garage, an inspector notes that the wall separating
the garage from the living space is framed with wood studs. Which wall assembly detail is
required to meet standard safety and fire-separation criteria for this boundary?
A. 1/2-inch regular drywall on the garage side only
B. 1/2-inch Type X drywall on the living side only
C. 1/2-inch gypsum board applied to the garage side, with penetrations sealed
D. 5/8-inch Type X gypsum board installed on both sides of the framing studs
Answer: C
Rationale: Modern standard fire-separation rules mandate a minimum of 1/2-inch gypsum
board applied to the garage side of the wall separating the garage from the residence. Any
,penetrations through this barrier must also be properly fire-stopped to maintain the
assembly's integrity against smoke and fire transmission.
3. An inspector is evaluating a gas-fired water heater located in a residential garage. The
unit is installed directly on the concrete slab floor. What condition should the inspector
report regarding this installation?
A. The unit is installed correctly provided it has an expansion tank attached
B. The burner ignition source must be elevated a minimum of 18 inches above the garage floor
unless labeled as flammable vapor ignition resistant (FVIR)
C. Gas water heaters are strictly prohibited from being located inside a residential garage space
D. The draft hood must be connected to an active mechanical exhaust fan
Answer: B
Rationale: Ignition sources for gas-fired appliances located in garages must be elevated at
least 18 inches above the floor to lower the risk of igniting heavier-than-air flammable
vapors. An exception applies if the unit is explicitly listed as Flammable Vapor Ignition
Resistant (FVIR), though verifying proper installation height remains a key inspection step.
4. While inspecting the electrical main panel, an inspector observes two neutral conductors
terminating under a single terminal screw on the neutral bus bar. How should the
inspector document this condition?
A. Acceptable practice provided the terminal screw is tightened securely
B. Acceptable practice if the wires are of the same gauge and metal composition
C. Deficient installation commonly referred to as double-tapping, which requires correction
D. Deficient installation only if the neutral bar lacks additional vacant terminal ports
Answer: C
Rationale: Most terminal bus bars are explicitly listed for a single neutral conductor per
terminal screw. Terminating two neutral wires under one screw (double-tapping) can cause
loosening, overheating, and elevated risk of electrical fire or loose neutrals. This condition
should be cited as a safety deficiency.
5. During a roof inspection, the inspector examines an asphalt shingle installation on a roof
deck with a pitch of 3:12. What specific installation method is required for asphalt shingles
on low-slope roofs (2:12 up to 4:12)?
,A. Standard single-layer underlayment applied with a 2-inch overlap
B. Double-layer underlayment or a continuous self-adhering polymer-modified bitumen
membrane
C. Interlocking metal flashing placed beneath every row of asphalt shingles
D. Application of liquid asphalt cement over the entire roof surface before shingling
Answer: B
Rationale: For roof slopes between 2:12 and less than 4:12, standard single-layer
underlayment is inadequate to prevent water intrusion from wind-driven rain or ice
damming. Building standards require a double layer of underlayment or an approved self-
adhering ice/water membrane across the roof deck.
6. An inspector is evaluating the exterior drainage around a house with a slab-on-grade
foundation. Which grade slope away from the foundation wall represents the standard
recommendation for proper site drainage?
A. 1 inch per foot for the first 2 feet
B. 6 inches of fall within the first 10 feet
C. 12 inches of fall within the first 5 feet
D. 2 inches of fall within the first 15 feet
Answer: B
Rationale: To prevent water pooling and foundation damage, standard drainage guidelines
require the ground surface adjacent to the foundation to slope downward a minimum of 6
inches within the first 10 feet (a 5% grade slope), unless restricted by property boundaries or
obstructions where swales are utilized.
7. An inspector locates a subpanel in a hallway closet. Upon opening the dead front, the
inspector notices that the neutral bus bar is bonded to the metal enclosure with a bonding
strap, and the equipment grounding wires share the same bus bar. What should the
inspector report?
A. The installation is fully compliant with electrical codes for remote distribution panels
B. Neutral and equipment grounding conductors must be separated in subpanels, and the
subpanel neutral bus must be isolated from the cabinet
, C. Equipment grounding conductors are not required inside subpanels if the main panel is
grounded
D. Bonding straps are required in all subpanels regardless of location
Answer: B
Rationale: In remote distribution panels (subpanels), the neutral bus bar must remain
unbonded (isolated) from the metal enclosure, and equipment grounding wires must
terminate on a separate grounding bus bar connected to the cabinet. Combining them creates
parallel neutral paths back to the main service, posing a severe shock hazard.
8. While evaluating a gas-fired forced-air furnace, an inspector turns on the thermostat
and observes the main burner ignition. As the circulating blower fan starts up, the burner
flames roll back toward the control compartment and flicker excessively. What is the most
likely cause of this issue?
A. A clogged air filter in the return plenum
B. A cracked or compromised heat exchanger
C. Excess supply air pressure in the duct system
D. An improperly set limit control switch
Answer: B
Rationale: Flame disturbance or flame rollout when the supply blower engages strongly
suggests airflow from the blower plenum entering the combustion chamber through a
cracked or perforated heat exchanger. This is a critical safety defect that exposes occupants
to carbon monoxide and requires immediate professional heating technician evaluation.
9. An inspector is assessing the plumbing vent system of a two-story home. A plumbing
vent pipe terminates through the roof. What is the minimum standard height the vent pipe
must extend above the roof surface in regions not subject to heavy snowfall buildup?
A. 2 inches
B. 6 inches
C. 18 inches
D. 24 inches
Answer: B
