Study Guide Professional Home Inspector TREC/NHIE Exam - Q & A (Complete Solutions)

Study Guide Professional Home Inspector TREC/NHIE Exam - Q & A (Complete Solutions) Clay tile roof should have how much overlap? a. 6" b. 3" c. 10" d. 12 What is the heaviest roof material per sq. ft.? a. Slate/ concre ...

Study Guide Professional Home Inspector TREC/NHIE Exam - Q & A (Complete Solutions) Clay tile roof should have how much overlap? a. 6" b. 3" c. 10" d. 12 What is the heaviest roof material per sq. ft.? a. Slate/ concrete tile b. Asphalt c. Fiberglass d. Tar & gravel with ballast Wood shingle/shakes should be spaced how far apart? a. 3/8" b. 5/8" c. 1/2" d. 3/4" Flat roofs - what is the most common cause of leaking? a. Seams b. Ponding c. Parapet walls d. Gutters What does water ponding cause? a. Shorten life expectancy b. Promotes fungi & moss growth c. Allows seepage d. All of the above Flat roofs- what is the cause of blisters? a. Rotted underlayment b. Poor grade of shingles c. Air & water trapped between layers d. Loss of UV protection Asphalt shingle valley overlap required a. 12" closed cut or woven b. 6" open c. 6" open or closed d. 18" closed Type(s) of insulation used with a flat roof a. Urethane b. Fiberglass c. Polystyrene d. All of the above Cap flashing required over a parapet wall a. True b. False A 3-tab asphalt shingle can be installed on pitches as low as 2/12, if the roof? a. Never b. If the roof has a hot tar roof coating c. If there are two layers of roofing felt under the shingles d. Only if you use a 30 year shingle What is the most durable roof covering? a. Slate b. Wood c. Asphalt d. Metal When does a built-up roofing need flood coating? a. Delamination b. Stain on ceiling c. Tar paper is showing d. Gravel is embedded in tar Where is roof most likely to leak when re-roofing? a. Edge b. Penetrations c. Valleys d. Gable ends A built-up roof having a lap joint ever 12" is a: a. 3-ply b. 6-ply c. 2-ply d. 4-ply roof Wood shakes/shingles are best maintained by: a. Applying a quality oil-base paint annually b. Applying a quality waterproof sealer periodically c. Allowing them to age naturally d. Washing annually with a chlorine solution to remove mildew and soil Metal roofs are best protected by: a. Properly maintaining with paint b. Finished with brush-on bitumen coating c. Allowing them to age naturally d. Electrolytically applied terns Which of the following is not suited to a roof with a 2/12 pitch? a. Asbestos Cement shingles b. Roll Asphalt c. Asphalt shingles d. Urethane foam What does a drip edge do? a. Stops ice damming b. Protects the parts below it like the fascia, siding, etc. c. Protects the ridge vents d. Prevents cupping of shingles Skylight curbing must extend above the roof a minimum of? a. 4-inches b. 6-inches c. 2-inches d. 8-inches What should you do if you come across a snow covered roof? a. Remove the snow and inspect as usual b. Note the snow and inspect as usual c. Note the snow and lack of visibility and access d. Say nothing and inspect as usual A copper-to-steel connection undergoes a/an? a. Chemical reaction b. Electrolytic reaction c. Nuclear reaction d. Thermal reaction What causes water hammer? a. Loose pipes b. Instantaneously closing valves c. Hydrostatic shock d. All of the above Name three common locations of cross connections in a plumbing system. a. Bidet, garden hose, and boiler connection b. Toilet, sink, and bidet c. Garden hose, laundry tubs, toilet d. Boiler connection, toilet, and lawn sprinklers Name two locations to install a check valve in a house with combination sewers to reduce the risk of backup into the basement. a. Floor drains and main drain line b. Basement sink and toilets c. Hose bibs and pool self-fill mechanisms d. None of the above The recommended slope for waste plumbing is typically? a. ¼ inch per foot b. ½ inch per foot c. ¾ inch per foot d. 1 inch per foot What type of trap is no longer used in residential construction? a. S-trap b. P-trap c. Q-trap d. V-trap Describe the function of a trap primer. a. To remove water to prevent overflowing of floor drain b. To add water to the trap to replace water lost through evaporation c. To increase the amount of water consumed in the trap d. To allow siphoning of the trap The most common clue to a venting problem is? a. Sewer odor b. Gurgling drains c. Slow drains d. All of the above A vent pipe does not need to extend past the attic. a. True b. False What is the minimum diameter and extension above the roof line of a vent pipe to prevent frost/snow closure? a. 4-inch diameter and 12 inch extension b. 3-inch diameter and 10-inch extension c. 3-inch diameter and 6-inch above snow line d. 2 ½-inch diameter and 8-inch extension What is a wet vent? a. A vent that protects the roof in the rain b. A vent that is never dry c. A vent that also serves as drain d. A vent that is larger that a dry vent Describe a French drain or dry well. a. A gravel pit that accepts waste from the plumbing system b. A drain installed by a Frenchman c. Can be used instead of a septic system d. A buried gravel pit designed to allow water to accumulate quickly and dissipate slowly by soaking into the soil A temperature pressure relief valve on a water heater that is installed above the tank in the pipe is wrong why? a. Must be installed within the top 8-inches of the tank b. Must be installed within the top 6-inches of the tank c. Not required to be installed in the tank at all d. Not required in older systems Temperature/pressure relief valves are typically rated at? a. 100 psi and 212 °F b. 150 psi and 210 °F c. 210 psi and 150 °F d. 110 psi and 210 °F What is the maximum length of a flexible gas appliance connector to a dryer or range? a. 6-feet b. 3-feet c. 18-inches d. 48-inches How do you check if shower door has safety glazing? a. Marked in corner b. Glass will be foggy c. Wire mesh d. Hit it with a hammer If a natural gas appliance is changed to LP gas, you need? a. A smaller orifice b. A larger orifice c. Change gas valve assembly d. You can't change from gas to propane How much water does a modern residential toilet discharge into the waste system? a. 1.6 lpf b. 1.6 gpf c. 2.5 gpf d. 3.5 gpf Copper & galvanized steel can be joined by what method? a. Brass converter fitting b. Di-electric union c. Dimorphic union d. Both a and b A flexible appliance connector can be cut? a. True b. False Two 3-foot appliance connectors can be connected to make a 6-foot connection. a. True b. False What kind of connector is needed to attach plastic DWV to cast iron DWV? a. Hubless b. Hopeless c. PVC to ABS d. CPVC Gas water heaters are allowed in all of the following locations except? a. Basements accessible only from interior stairs b. Attics accessible only from a permanent ladder c. Storage closets d. Laundry rooms open to the living area Plumbing vent must terminate at least? a. 10-feet from window and 6" above roof b. 6-feet from window and 10" above roof c. 7-feet from window and 12" above roof d. 4-feet from window and 6" above roof What determines the amount of electricity (amperage) a wire can carry? a. Size (diameter) b. Length c. Color d. Type (stranded or solid) How many wires are there from the street into a house in a 240-volt system? a. 3 b. 2 c. 4 d. 1 The size of the fuses or breakers at the main disconnect will always tell you how much electricity is available to the house? a. True b. False What size service wire (minimum) would be required to provide a house with 60-amp service? a. #6 Cu b. #6 Al c. #4 Cu d. #2 Al How is the electrical system in most older homes grounded? a. Water supply piping b. UFER ground c. Ground rods d. Power company The ground wire should always be clamped upstream of the water meter? a. True b. False How are electrical systems grounded on rural properties where the well supply piping into the house is plastic? a. Ground rods b. UFER grounds c. Metal well casing d. Both a and c Breakers are safer than fuses. Any house with fuses should be upgraded to breakers. a. True b. False Fuses are more prone to be improperly sized and overloaded. a. True b. False What is/are the most common reason for replacement of knob-and-tube wiring? a. Breakdown of cloth covering (insulation) b. Buried in thermal insulation c. Homeowner splices and repairs d. All of the above Name an important improvement between knob-and-tube wiring and modern cable. a. Use of grounding b. Use of aluminum wiring c. Fusing the neutral d. None of the above Where are GFCI's required in newer houses? a. Kitchen counters b. Bathrooms c. Unfinished basements d. Outdoors e. All of the above In most cases, three distribution wires connected to one fuse or breaker is acceptable. a. True b. False What is the most common electrical flaw found residentially? a. Over-fusing b. Use of Al wiring c. Lack of GFCI's d. Use of grounded receptacles A non-grounded receptacle within 6" of water should be replaced with? a. GFCI b. GFCI upstream from receptacle c. Single pole GFCI Breaker d. All of the above Maximum number of disconnects to shut off the main panel is/are? a. 1 b. 6 c. 4 d. 8 What is the correct Cu wire size for a 20 amp breaker? a. 12 b. 14 c. 10 d. 16 Non-metallic sheathed cable in an attic on top of joist must be? a. Protected within 6-feet of scuttle b. Must be fastened every 4 ½ feet c. Not allowed d. Both a and b Clothes closet - bulb ok or not ok - new construction? a. Surface-mounted or recessed incandescent fixtures with completely enclosed lamps b. Surface-mounted or recessed fluorescent fixtures. c. Surface-mounted incandescent fixtures can be mounted on ceiling with 12" clearance. d. All of the above Sub panel requirements. a. Neutral and ground must be separated b. Can be grounded together c. Must be bonded d. Must be isolated e. a, c, and d Grounding rod must be driven? a. 6 feet b. 10 feet c. 8 feet d. 12 feet A fused neutral (neutral wire runs to a fuse) is? a. Ok b. Unsafe c. Grand-fathered d. None of the above Two-conductor wiring can be used with a GFCI? a. True b. False Does a sump pump require a GFCI? a. Yes, if it is a dedicated receptacle b. No, if it is a dedicated receptacle What is the minimum required clearance in front of the main electrical panel box? a. 12" wide x 24" front b. 24" wide x 30" front c. 26" wide x 36" front d. 30" wide x 36" front AC cable, commonly known as BX, often contains a bare aluminum wire. Which of the following statements is true regarding the wire? a. The wire is a grounding wire and should be connected to grounding terminals inside boxes and panels. b. The wire is a bonding wire and should not be connected or brought into the interior of boxes. c. The wire is required to be treated with anti-oxidant paste at its terminations d. The wire must be reported as an aluminum branch circuit wire even if the other conductors in the cable are copper When a GFCI is installed on a two-wire non-grounded system, it provides? a. Full grounding protection b. No protection as there is no ground wire c. Fault protection, but not grounding protection d. A false reading when testing the GFCI using the built-in test button on the unit What causes structures to move? a. Gravity b. Wind c. Water d. Sun What are the three ways a structure may give in to gravity? a. If it is sitting on something that is not strong enough, the ground below will fail b. If the skeleton of the structure is weak, it will not support itself, the weight of the structure itself is the 'dead load' c. If the live load on the structure is greater than expected, it will collapse. d. All of the above