Nevada C-3 Carpentry Contractor Exam Practice Test Questions And Correct Answers (Verified Answers)

Nevada C-3 Carpentry Contractor Exam Practice Test Questions And Correct Answers (Verified Answers) Tube Building Desert Termite - ANSWER -Very common in southern and western desert areas in elevations below 6000 feet. Irregular tubes on tree trunks, fences, plant debris is the work of them. Damage isn't as severe as a regular Subterranean Termite because their diet consists of dry plant materials. Their flights of Alates involving hundreds take place during or following afternoon and evening rain showers. May be as many as 20 flights between mid June to late September. Subterranean Termite control techniques - ANSWER -Sanitation, Proper Construction and Chemical Control Subterranean Termite Control: Sanitation - ANSWER -Areas under or around a structure where excess cellulose debris exists can encourage colonization. Any food source must be removed around the structure or planned building location Cellulose Debris - ANSWER -Debris that is of a size that can be raked and in aggregate 1/2 cubic foot or more or a stump or any other wood that is imbedding in a footing and constitutes a contact of wood with the earth. Doesn't include pressure treated wood that is used to support a manufactured home or the skirting. 864 Cubic inches (length times width times height)(12 x 12 x 6 = 864) If the amount is more it must be removed. Proper construction - ANSWER -improper construction is the largest contributor to all wood destroying pests. Types would be Earth to wood contact, faulty grade, insufficient ventilation, excessive moisture, cellulose debris, wood and reinforcement Earth To Wood Contact - ANSWER -In new construction must be avoided. 90% of termite infestations come from earth to wood contact. Its defined as any support or other structure of cellulose that is LESS THAN 3 INCHES above the soil level and in contact with the inspected structure, whether its internal or external relation to the structure. Faulty Grade - ANSWER -Faulty grades between the soil and wooden members also encourage subterranean termites. Its defined as a floor joist or stringer is LESS THAN 12 INCHES ABOVE THE SOIL LEVEL, The top of the foundation is LESS THAN 3 INCHES ABOVE the adjacent soil level, The drainage is such that there is visible evidence of surface water on the structure. It can be avoided by ensuring the crawlspace is at least the minimum clearance of 12 inches. Insufficient Ventilation - ANSWER -A major contributor to subterranean termites as well as wood destroying fungi. Lack of air movement allows moisture to build a micro climate. Its defined as less than 1 SQUARE FOOT OF VENTILATION PER 300 SQUARE FEET OF CRAWLSPACE, LESS THAN 1 SQUARE FOOT FOR EVERY 1500 SQUARE FEET 1 of ground are cover by a vapor barrier and less than four areas permitting ventilation. Excessive Moisture - ANSWER -Actual moisture on the wood or wood products used in the structure. Reinforcement - ANSWER -Concrete should be considered for improving the structural characteristics but to reduce cracking of stemwall and footings which can be entry points for termites. Cracks only 1/32 of an inch are large enough for entry. Termite Shield - ANSWER -May aid in the overall termite proofing of the structure but doesn't deter against termite attack. have been proven to not be that effective due to improper installation or distortion of their 45 degree angle Horizontal Pretreatment - ANSWER -An application over the surface of the soil before a slab is poured.Needs to be done before the final preparations of concrete pouring have been made. Standard Application rate is 1 gallon of dilution per 10 square feet of surface area. Applicator should pay attention to critical areas( recognized as any area that is prone to subterranean termite entrance below a slab) Another form of treatment would be the treatment of soil before the footings for raised foundations are poured, its done by applying the material between the form boards and must form a continuous unbroken barrier. Vertical Pretreatment - ANSWER -Applying termiticide into a trench or rodding down into the soil. RODDING SHOULD NOT EXTEND BELOW THE TOP OF THE FOOTING. The trench of a final grade must not be wider than 6'' and must not extend below the top of the foundation footing also must be large enough to absorb the application. With rodding there should be a distance that will provide an unbroken chemical barrier a space of 12-24'' depending on the soil. Standard application rate is 4 gallons of dilution per 10 linear feet. Wood Pretreatment - ANSWER -Can be used as a post construction treatment and as a fungicide. If a wood member has only one or two sides exposed a second application must be made after a minimum of 20 mins from the first application. Baiting Systems - ANSWER -Not under pretreatment regulations. Baits are slower acting materials. Exploits the social nature of termites allowing the workers bring the bait back to the colony to share. Pretreatment Regulations - ANSWER -Must include name phone # of pest control company, name and address of the person where the treatment will be performed and the location of the site with address and zip code, expected start and stop date, number of locations, description of treatment, description of location with the tags listed, date when the form is completed, licensee who performed the treatment Pretreatment Tag - ANSWER -Must include the company name, application date, what chemical was used. the dilution rate, the gallons applied, what was treated(wood,vertical,horizontal), printed name of the licensee, posted immediately after each treatment. Post Construction Treatment - ANSWER -Post Construction Treatments to slab foundations could have possible contamination of vent/duct-heating/cooling systems. When drilling and treating slab on the inside contamination can be avoided by PULLING BACK ANY CARPET AND PADDING, DRILLING THE TREATMENT HOLES, APPLYING THE THE CHEMICAL AND SEALING EACH HOLE BEFORE TREATING THE NEXT ONE AND USING LOW PRESSURE HELPS PREVENT SPLASH BACKS. Vertical treatments through the slab should be done around all utility entrances and any interior walls that could hide cracks. Its recommended that drill holes are performed at 45 degrees to decrease possibility of damage to existing ducts. Desert Dampwood Termite - ANSWER -Found in Clark county only. Minor importance. Looks like a dry wood termite, only difference is the abdomen of the nymph has a spotted appearance because the intestine show through the body wall. Soldiers have a brown low flat head with mandibles that are thick near the base with narrow tips. The alate is dark with wings. Three castes: Reproductives, Soldiers and Nymphs. It feeds and inhabits MOIST WOOD. attacks roots systems and poles below the surface and occasionally baseboards and door frames.