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CR-42 Study Guide Exam With All
Correct Answers.
What is the minimum exposure on a 24 inch wood shingle? A)5-1/2 inches B)6-1/2 inches C) 4 inches D)5 inches - Answer 5 inches Which of the following locations would NOT typically have an expansion joint on a built up roof? A)every 100 lineal feet of roof B)where substantial temperature variations occur in the occupancy below the roof C)at new additions to an existing roof D)where the roof intersects a vertical wall - Answer Every 100 lineal feet of roof What is the ASTM code for spray on poly roof system? A)ASTM D 1026 B)ASTM C 1142 C)ASTM C 1029 D)ASTM D 1114 - Answer ASTM C 1029 Which of the following would NOT be an appropriate deck material for an asphalt shingle roof? A)1" x 6" solid B)1" x 6" spaced C)solid wood planking D)plywood - Answer 1" x 6" spaced Asphalt is applied to a roof at an approximate temperature of ________degrees.
A)225 - 250
B)185 - 225
C)375 - 425
D)325 - 375 - Answer 375 - 425 An asphalt shingle should be ________the drip edge or fascia. A)1/4 inch to 3/8 inch below B)1/4 inch above C)1/2 inch below D)even with - Answer 1/4 inch to 3/8 inch below How do you leave an open roof at the end of the day? A)finish with broom B)backnail it C)install a Cant strip D)install temporary water Cut-offs - Answer install temporary water Cut-offs Brooming may be required while workers lay down glass fiber felts on a built up roof when the weather is: A)cloudy. B)windy. C)hot. D)cold. - Answer Windy. The proper way to store hot applied membrane materials is: A)stacked horizontally without spacers between the rolls. B)vertically standing on end. C)stacked horizontally with spacers between the rolls. D)laid horizontally and staggered. - Answer vertically standing on end.
C) 10 feet D) 6 feet - Answer 8 feet If a panel is not approved by ASTM, but the owner still wants you to use a corrugated fiberglass panel for a sky light, what kind of slope would you have to put it on? A)3: B)2: C)5: D)4:12 - Answer 4: All these except for one is a factor in designing a pitch roof? A)walk load B)wind load C)hydropressure up-lift D)dead load - Answer hydropressure up-lift What is the minimum size width for metal flashing used in a valley with asphalt shingles? A)16 inches B)10 inches C)8 inches D)24 inches - Answer 24 inches Which of the following is NOT one of the basic types of shakes? A)straight split B)hand spilt and resawn C)taper split D)beveled split - Answer beveled split What is the name of the tile used to terminate a course of tile at a gable end on flat tile roof?
A)eave closure B)tile and half C)half tile D)finishers - Answer finishers What method is best to be used to repair wood shakes? A)? B)put mortar on rails C)place metal then bend 90 degrees to hold in place D)place metal in-between the cracks then felt paper over metal - Answer place metal then bend 90 degrees to hold in place What is a suitable material for a starter strip when installing asphalt shingles over an existing roof? A)Wood sheathing B)15 pound felt underlayment C)Trimmed asphalt shingles D)Sheet metal - Answer Trimmed asphalt shingles What is the total number of squares on a flat roof that is 125 feet x 100 feet? A) B) C) D)75 - Answer 125 An eave closure is used on what type of roofing material? A)asphalt shingles B) rolled roofing C)roll tile D)flat tile - Answer roll tile
A)5:
B)4:
C)7:
D)6:12 - Answer 7: If the bitumen in a built up roof system has been mopped in at excessive temperatures, which one of the following conditions would not likely result? A)voids between plies B)light mopping weights C) a potential lack of water proofing qualities D)high expansion properties - Answer high expansion properties If you are putting on fascia around a 26 foot by 34 foot home that has a hip roof with 2 foot eaves, how many pieces of 1 inch x 8 inch by 10 foot fascia board is needed? A) B) C) D)14 - Answer 14 Sheet copper for eaves, troughs and corners should be made from: A)not rolled B)cold rolled C)annealed D)soft copper - Answer cold rolled According to OSHA, a trench that reaches a depth of 4 feet shall be supplied with a ladder or a means of egress. The maximum lateral distance a person shall travel to reach this ladder shall not exceed _______feet. A) B)
C)
D)50 - Answer 25 OSHA requires every air (pneumatically) driven stapler to have a safety device that prevents staples from being ejected unless the muzzle is in contact with the work if the stapler operates at more than: A)125 psi. B)75 psi. C)100 psi. D)50 psi. - Answer 100 psi. When reroofing a roof with a 90# underlament and one layer of asphalt shingles on a 5/8 inch deck, what is the recommended nail length? A) 1 1/2 inch B) 1 1/4 inch C) 1 inch D) 3/4 inch - Answer 1 1/4 inch According to the code, flat or corrugated plastic skylights shall have a minimum slope of? A)5 in 12 B)3 in 12 C)4 in 12 D)2 in 12 - Answer 4 in 12 The best attic ventilation would be achieved by having both a ridge vent and a vent. A)eave vent B)soffit C)gable end D)turbine fan - Answer soffit
B)Plastic cement C)Replace with new shingle D)Felt under metal flashing & new shingle in top - Answer Plastic cement According to the IBC, the horizontal distance between plastic skylights is: A)4 feet. B)6 feet. C)2 feet. D)10 feet. - Answer 4 feet. The minimum pitch for residential roof with wood SHAKES is A)3 inches per foot B)5 inches per foot C)4 inches per foot D)2 inches per foot - Answer 3 inches per foot Which is the only type of shingle used to make closed valleys? A)Asphalt shingle B)Wood shingle C)wood shake D)Asbestos-cement shingle - Answer Asphalt shingle Which of the following is not an acceptable safety precaution for someone who uses corrective lenses? A)Protective goggles with general magnification lenses. B)Protective goggle worn over corrective specticles. C)Corrective lenses mounted inside protective goggles. D)Spectacles with lenses that are both corrective and protective. - Answer Protective goggles with general magnification lenses.
When flashing an open valley with rolled roofing, it should be applied A)in a double layer, 18" on bottom and 36" on top B)in a single layer, 24" wide C)in a double layer, 12" on bottom and 24" on top D)in a single layer, 36" wide - Answer in a double layer, 18" on bottom and 36" on top Where the edge of a shingle meets a vertical wall under construction, the surfacing on the wall should be applied: A)after step flashing. B)after the cant strip. C)before the roof shingles. D)before step flashing. - Answer after step flashing. The best temperature for asphalt application is the ____________temperature. A)equiviscous B)softening point C)finished blowing D)flash point - Answer equiviscous What is the maximum nail spacing allowed for a drip edge? A)12 inches B) 36 inches C)48 inches D)16 inches - Answer 12 inches All of the following are acceptable for starter courses under asphalt shingles EXCEPT: A)a 9 inch granular roll B)#90 roll roofing C)an inverted shingle with tabs removed
Slate roofing that is 24 inches long is being installed with a 3 inch head lap. What is the proper exposure for the slate? A)10.5 inches B)18 inches C)8.5 inches D)13 inches - Answer 10.5 inches Clay tile shingles are being installed over solid sheathing in a warm climate; the roof slope is 6 on 12, what minimum underlayment shall be used? A)2 layers of # B)2 layers of # C)1 layer of # D)1 layer of #15 felt - Answer 1 layer of # Fall protection training for employees must include all of the following areas except: A)the nature of hazards in the roof area. B)the role of each employee in safety monitoring. C)the current procedures for inspecting fall protection. D)how to rescue someone in the event of a fall. - Answer how to rescue someone in the event of a fall. Which of the following is the correct definition of a membrane? A)A flexible or semi-flexible roof covering or waterproofing whose primary function is to exclude water B)layer C)felts, fabrics, & mineral surfaced sheets D)fiberglass felts with perforations - Answer A flexible or semi-flexible roof covering or waterproofing whose primary function is to exclude water When installing asphalt shingles on wood plank decks, what is the minimum nail length to use? A)3/4" B)1 1/4"
C)1"
D)1 1/2" - Answer 1" Fasteners for Asphalt roofing shall have a minimum of _________shank and a head of minimum Of 3/ inch. A)10 gage B)12 gage C)16 gage D)14 gage - Answer 12 gage In relation to the roof membrane, where is counter flashing usually installed? A)sandwiched in the middle of the membrane B) beneath the membrane on top of the base sheet C)above the membrane D)beneath the membrane - Answer above the membrane Dome skylights shall not have a height less than _________inches from the mounting flange. A) B) C) D)2 - Answer 3 Referring to the illustration, the "intermediate rib deck" is illustrated by the letter. A)c B)b C)a D)is not shown - Answer B What is the composition of roofing slate?
Exposed edges of roof insulation boards should be protected with____________at the end of each days work. A)Water cutoffs B) Back paneling C)Primer D)Flashing - Answer Water cutoffs When using polyisocyanurate insulation, ___________is installed except when using perlite, polystyrene, or urethane on a EPDM system. A)a slip sheet B)nothing C)dead-level asphalt D)a permeable membrane - Answer a slip sheet The flash point for a given bitumen is 525 degrees farenheight; what should the temperature of the kettle be set at? (NOTE TO CLIENTS: THE NRCA SAYS THE KETTLE SHOULD BE SET 25 DEGREES BELOW THE FLASH POINT, WE AREN'T SURE OF THE EXACT WORDING, BUT KNOWING THIS WILL GET YOU TO THE CORRECT ANSWER. A)at 475 degrees F or below B)at 475 degrees For above C)at or below 500 degrees F D)at or above 525 degrees F - Answer at or below 500 degrees F If an employee provides his or her own protective equipment, who is responsible for it's maintenance? A)Manufacturer of the equipment B)OSHA C)Employee D)Employer - Answer Employer The best substrate for liquid application of waterproofing membrane is:
A)steel B)concrete C) wood D)plaster - Answer plaster The maximum height of ladder jack scaffolding is _________feet. A) B) C) D)12 - Answer 20 On clay tile roof "closing" an eve requires A)two and one half tiles B)two tiles C)one tile D)one and one half tiles - Answer one and one half tiles How should felts be applied on low slope built up roofs with a pitch of 2:12 or less? A)perpendicular to the flow of the water beginning at the low points in the deck B)parallel to the flow of water beginning at the high points in the deck C)parallel to the flow of water beginning at low points in the deck D)perpendicular to the flow of water beginning at the high points in the deck - Answer perpendicular to the flow of the water beginning at the low points in the deck What shape should ridge cap shingles be shaped when cut from standard three-tabs? A)square with tapered laps B)diamond C)rounded D)square. - Answer square with tapered laps
B)ASTM D 1970
C)ASTM C 1167
D)ASTM D 6380 - Answer ASTM C 1167 When installing wood SHINGLES, the nails should be located ___________inch(es) from the edge of the shingle. (Note: WOOD SHAKE is 1", do not get these two confused) A)1/ B)3/ C) D)1 - Answer 3/ According to OSHA, when working above ground, the minimum height at which a safety device is required is ______feet. A) B) C) D)12 - Answer 6 What is not the proper way to nail when repairing a broken slate tile? A)Through roofing cement B)2 inches from lap C)Through vertical joint in the first overlaying course D)5 inches from exposure - Answer Through roofing cement What percentage of the aggregate must be adhered in the hot bitumen? A) B) C) D)30 - Answer 50
When roofing meets siding on a vertical wall. How should the flashing be installed? A)lap the shingle over the siding and caulk B)install metal flashing over each coarse of shingles and under the siding C)install metal flashing under each coarse of shingles then over the siding D)apply asphalt over the shingle and siding where they meet - Answer install metal flashing over each coarse of shingles and under the siding In roofing projects, BUR refers to: A)Built-Up Roofing B)Base Use Roofing C)Bitumen Underlayment Roofing D)Building Under Roof - Answer Built-Up Roofing The corner edge of the first course of asphalt shingles should overhang the fascia or a rake by: A)1/4 - 3/4" B)1/2" -3/8" above facsia C)Even with the fascia D) 1/2"- 1" - Answer 1/4 - 3/4" There are 2800 square feet of roof area. At 3 bundles per square, how many bundles of shingles will be needed for the roof? A) B) C) D)66 - Answer 84 Refer to the illustration, what is the dimension of "C". A)10 inches
