National 4 Flashcards
Poured concrete retaining walls should have _____ between the wall and the soil, to prevent _____.
gravel
rotation
Blocked _____ can have adverse effects on foundations and basement walls.
gutters
Foundation settling of a concrete basement wall can show symptoms such as _____.
efflorescence
Movement joints in brick veneer are required at points where support is derived from _____ _____ _____.
different structural components
Adhered masonry veneer is installed in the same manner as _____.
Stucco
The most appropriate fastener material for a slate shingle roof covering is _____.
Copper nails
The water resistive barrier installed under three coat stucco should be at least _____.
Two layers of 60 min grade a paper
safety glazing is not required at the _____.
Top of landing
A collar tie would most likely be found in _____.
The upper part of attic
The MAXIMUM allowed depth notch in a twelve-foot-long 2x10 floor joist located five feet from the joist end is _____.
0 inches
You see a ceramic tile floor with numerous cracks running through the grout and the tiles.
The floor system is constructed by 2x10 floor joists. Which is the most likely cause of this condition?
The floor joist span is too long.
Ceiling joist that meet at a load bearing wall should lap each other at least _____.
3”
Which material is most appropriate for fastening slate shingles?
Copper
The grounding electrode system of a house provides an _____.
alternate return path for electricity
Metal touching an energized conductor is most likely to cause _____.
Arc flash
A subpanel in a detached building has melted insulation on a neutral conductor. What is the most likely cause of this condition?
The neutral conductor is loose at the terminal bar
Service entrance conductors in sheathing should be how far from a deck _____ ft.
0
A house is serviced by 2-200-amp panel box. What is the amperage for this house?
Unable to determine
Common defect with Edison base fuses?
Fuses are susceptible to overfusing.
1950’s home with 3 prong receptacles show as grounded. What is the issue?
The ground is connected to the grounded connections.
Loose receptacles could lead to a _____ _____.
Fire hazard
A 240-volt dryer circuit is a _____.
multi-wire branch circuit
The effect of high humidity on an air conditioning system will be _____.
decrease in the sensible load
What is most likely to cause the greatest reduction of air flow in a flexible air duct?
A 90 degree bend in the duct.
What is the most likely result of insufficient air flow across the evaporator coil?
Ice forms on the evaporator coil
Which is not a factor when determining cooling load calculations?
Roof coverings
What component is involved in controlling when a hot water boiler activates?
A high limit switch.
Browned-color particles under a flue collar of an induced draft gas furnace are most likely an indication of which defect?
An excessively long vent connector
What is one gas appliance that may be in a bedroom?
99,000 BTU direct vented demand water heater
Which is considered a radiant heating system?
Natural gas fired steam boiler
An air vent is installed on what?
Steam heating radiator
Permeability is the property of a material that allows passage of _____.
Water vapor
Fiberglass batt insulation slows heat movement by _____.
Reflecting infrared radiation off of the insulation.
What action would most likely reduce fiberglass batt insulation R-value by the largest amount?
Creating a thermal mass within the insulation
Under what condition may a thermal barrier be required?
Foam insulation installed in a crawl space with a gas furnace.
What is residential geothermal heating?
A water /ethanol solution is piped through polyethylene loops to collect the earth’s natural heat.
The Hartford loop in a steam system is an _____.
equalizer that ensures that pressures are equal above and below the water line in the equipment.
house that you are inspecting has an unlit pilot light. What is your requirement as an ASHI inspector?
Report that the pilot was out.
A wood stove should have a pad under it that prevents sparks or embers from igniting a combustible floor. How far should this pad extend out in front of the stove?
16”
What is the clearance for combustibles for a single-wall furnace vent?
6”
What is the proper strapping requirement for ductwork?
4’
The implications of a dirty evaporator coil in a split-system air conditioner could be any of the following except for one. Which does not apply?
The compressor may be damaged trying to pump a liquid rather than gas.
The furnace blower stops running after the burners have shut off and then the blower
turns back on without the burners on-what is the most likely situation?
Fan/limit control switch does not operate properly
Below the balance point, a heat pump will _____.
Operate more economically
The label on a 240-volt electric water heater indicates that the element wattage should be 4,500. The measured current is 14.6 amps. The most likely explanation is that _____.
The wrong size element has been installed
Where is stairway width measured?
Above the handrail
On a vehicle door, a containment cable should be installed on _____ _____.
.
Extension springs
What is the BEST material for a masonry chimney crown?
Concrete
Creosote is more likely to be created in a chimney when burning _____ _____.
Unseasoned oak
What is the BEST reason for a chimney to terminate above nearby obstruction?
Wind may force combustion products down the flue.
wood burning stove is listed 12 inches clearance from combustibles. What is the minimum clearance to combustibles for this stove when using a sheet metal and air space clearance reduction device?
12”
A properly installed food waste disposer that makes no sound when activated can sometimes be activated by _____.
Pressing the thermal cutoff button
What is the prescriptive minimum distance between the bottom of a microwave oven and a range cooking surface?
None
What is LEAST likely to be an approved pool access barrier?
A self-latching pedestrian gate
Which is NOT a type pool filter?
Pea gravel
A double gate that allows access to the pool should be
Self-latching.
Visible leaks in pool equipment piping are not of concern if _____.
They are a concern
Pool drain covers must be marked with _____.
ANSI/APSP 16
All 125 volt receptacles located a maximum of ______ from the inside walls of a
swimming pool shall be protected by the ground fault circuit interrupter.
20’
All fixed metal parts, cables, and raceways that are not separated from the pool by permanent barriers. If these items are within _____ feet of the pool wall (horizontally), they must be bonded.
5’
A metal fence located within how many feet of a pool shell/spa should be bonded?
5’
Which would NOT be an approved irrigation system pipe?
Schedule 20 PVC
A roof is accessible by ladder and the home inspector believes the roof is safe to walk on. The MINIMUM method of inspecting this roof involves _____.
Viewing the roof from the ground
An eight-foot-tall concrete block wall leans in ½ inch and is not cracked. The wall is damp with moderate efflorescence. Who is the BEST specialist to recommend?
Landscape contractor
Nails that penetrate the roof sheathing are rusted. Some areas of roof sheathing present moisture stains and fungal growth. What is the MOST likely cause of these conditions?
Air leaking from the house to the attic.
Inspectors are pressured from all sides. List 6 parties for whom the inspector has an obligation toward (real or perceived).
Client, seller, listing agent, selling agent, inspectors’ boss/owner of inspection company.
