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Florida Exams > NRCA Membrane Roof Systems, 2023 > Flashcards

NRCA Membrane Roof Systems, 2023 Flashcards

1
Q
  1. NRCA recommends as the preferred method of installing rigid insulation board to
    cementitious wood-fiber roof decks.

A. Spot mopping
B. Blind nailing
C. Hot mopping
D. Installing a mechanically fastened base sheet or other separator layer prior

A
  1. D 87 TC > Ch.2 Roof Decks > 2.2 Cementous Wood Fiber Panels
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2
Q
  1. Steel roof decks are recommended to be gauge or heavier.
    A. 22
    B. 20
    C. 26
    D. 18
A
  1. A 94 TC > Ch.2 Roof Decks > 2.4 Steel
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3
Q
  1. Special attention to manufacturer recommended specifications should be observed when installing
    roofing materials below °F.
    A. 40
    B. 50
    C. 32
    D. 90
A
  1. A 187 TC > Ch.5 Roof Membranes > 5.1 Guidelines Applicable to All Membrane Types
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4
Q
  1. Moisture in or on materials may cause membrane .
    A. Slippage
    B. Fishmouths
    C. Blistering
    D. Skipping
A
  1. C 187 TC > Ch.5 Roof Membranes > 5.1 Guidelines Applicable to All Membrane Types
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5
Q
  1. NRCA recommends that asphalt be applied in the field within a range from the asphalt’s
    indicated EVT.
    A. + 15° F
    B. + 25° F
    C. + 35° F
    D. + 45° F
A
  1. B 192 TC > Ch.5 Roof Membranes > 5.2 Built-Up Roof Membrane
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6
Q
  1. Roll-roofing materials used as reinforcement in built-up roof membrane construction fall into
    all of the following categories except for .

A. Mineral-surfaced cap sheet
B. Base sheets
C. Ply sheets
D. Adhesive sheets

A
  1. D 193 TC > Ch.5 Roof Membranes > 5.2 Built-Up Roof Membrane
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7
Q
  1. NRCA does not recommend that conduit be embedded with roof assemblies or placed
    below roof decks.

A. Metallic
B. PVC
C. CPVC
D. PEX

A
  1. A 85 TC > Ch.2 Roof Decks > 2.1 Guidelines Applicable to All Roof Deck Types
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8
Q
  1. When installing perlite insulation as the primary insulation, NRCA recommends layer(s)
    usage to allow for offsetting and staggering board joints.
    A. One
    B. Two
    C. Two and one half
    D. Three
A
  1. B 156 TC > Ch.4 Rigid Board Insulation > Perlite
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9
Q
  1. The equiviscous temperature (EVT) range measures and identifies an asphalt’s and
    preferred application temperature.

A. Melting point
B. Elasticity
C. Viscosity
D. Flash point

A
  1. C 191 TC > Ch.5 Roof Membranes > 5.2 Built-Up Roof Membrane
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10
Q
  1. Bitumen can be .
    A. Heated to or above the actual flash point
    B. Maintained at high temperatures for prolonged periods
    C. Allowed to stand in luggers for long periods of time
    D. Circulated while heating
A
  1. D 199 TC > Ch.5 Roof Membranes > 5.2 Built-Up Roof Membrane
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11
Q
  1. When using concrete pavers as ballast, pavers should have a minimum compressive strength of
    psi.
    A. 2,200
    B. 2,300
    C. 2,400
    D. 2,600
A
  1. D 257 TC > Ch.7 Surfacings > 7.3 Ballast
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12
Q
  1. The materials used to construct vapor retarders can be categorized as and plastic or
    film.
    A. Asphalt
    B. Bitumen
    C. Perlite
    D. Insulation
A
  1. B 122 TC > Ch.3 Air and Vapor Retarders > 3.2 Vapor Retarders
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13
Q
  1. With use of EPDM Membrane materials, exposure to should be avoided to prevent
    swelling.

A. Ketones
B. Esters
C. Hypalon Coatings
D. Aliphatic Solvents

A
  1. D 216 TC > Ch.5 Roof Membranes > 5.4 Single-Ply Roof Membranes
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14
Q
  1. Reinforced EPDM roof sheets require that be applied at exposed cut edges of the sheet to
    prevent moisture intrusion.
    A. Contact Solvents
    B. Silica Sand
    C. Sealant
    D. Cut sheets
A
  1. C 217 TC > Ch.5 Roof Membranes > 5.4 Single-Ply Roof Membranes
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15
Q
  1. Rosin sheets are used to .
    A. Prevent drippage of bitumen
    B. Separate roof membranes
    C. Provide adhesion
    D. Provide vapor migration
A
  1. A 197 TC > Ch.5 Roof Membranes > 5.2 Built-Up Roof Membrane
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16
Q
  1. All of the following are common application methods for roof coatings except for .
    A. Airless spray
    B. Roller
    C. Brush or broom
    D. Pressure spray
A
  1. D 266 TC > Ch.7 Surfacings > 7.4 Coatings
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17
Q
  1. The criterion for judging proper slope for drainage is that there be no ponding water on the
    roof ____________ hours after a rain during conditions conducive to drying.

A. 8
B. 24
C. 12
D. 48

A
  1. D 84 TC > Ch.2 Roof Decks > 2.1 Guidelines Applicable to All Roof Deck Types
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18
Q
  1. When installing BUR roof drains, copper must be inches square minimum.
    A. 6
    B. 24
    C. 30
    D. 48
A
  1. C 398 TC > Ch.10 Construction Details > Index of Construction Details
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19
Q
  1. Excessive, prolonged heating of bitumen can cause .
    A. Poor adhesion
    B. Flash hazards
    C. Slippage
    D. Decreased strength
A
  1. B 199 TC > Ch.5 Roof Membranes > 5.2 Built-Up Roof Membrane
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20
Q
  1. In a built-up roof system, base flashing at a parapet wall with metal coping shall be a minimum
    height of __ inches.

A. 8
B. 6
C. 10
D. 5

A
  1. A 358-359 TC > Ch.10 Construction Details > Index of Construction Details
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21
Q
  1. In a built-up roof system, a plumbing vent stack shall be flashed a minimum of inches
    high.
    A. 8
    B. 10
    C. 12
    D. 14
A
  1. A 388 TC > Ch.10 Construction Details > Index of Construction Details
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22
Q
  1. Cement board has all the following properties that make it well-suited for use in roof
    assemblies except
    for .

A. Compressive strength
B. Tensile strength
C. Moisture resistance
D. Adhesive compatibility

A
  1. B 166 TC > Ch.4 Rigid Board Insulation > 4.12 Cement Board
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23
Q
  1. The minimum R-value/minimum thickness is determined at the of the roof insulation
    assembly.

A. Ridge
B. Valley
C. Low point
D. Curb

A
  1. C 173 TC > Ch.4 Rigid Board Insulation > 4.15 Tapered Insulation
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24
Q
  1. Side-lap fasteners for steel roof deck spacing should not exceed feet.
    A. 1
    B. 2
    C. 3
    D. 4
A
  1. C 94 TC > Ch.2 Roof Decks > 2.4 Steel
25
25. An intermediate rib deck is a steel panel with a rib opening of . A. 1 in to 1 in B. 1 in to 1 ¼ in C. 1 in to 1 ½ in D. 1 in to 1 ¾ in
25. D 92 TC > Ch.2 Roof Decks > 2.4 Steel
26
26. Deck panel end laps should not be less than inches and should be centered over structural supports. A. 2 B. 3 C. 4 D. 5
26. A 94 TC > Ch.2 Roof Decks > 2.4 Steel
27
27. Faced cellular-glass roof insulation is typically available in board sizes. A. 1 ft x 1 ft B. 1 ft x 1 ½ ft C. 2 ft x 2 ft D. 2 ft x 4 ft
27. D 140 TC > Ch.4 Rigid Board Insulation > 4.2 Cellular Glas
28
28. A low-slope roof system that generally includes weatherproof membrane types of roof systems installed on slopes at or less than . A. 2:12 B. 3:12 C. 4:12 D. 5:12
28. B 13 TC > Introduction > Membrane Roof Systems
29
29. A coal tar built-up roof system has a design minimum slope of . A. 1/8:12 B. 1/4:12 C. ½:12 D. 1:12
29. A 83 TC > Ch.2 Roof Decks > 2.1 Guidelines Applicable to All Roof Deck Types
30
30. For steel roof decks with spans greater than feet, side laps shall be fastened at 36 inches on center maximum. A. 2 B. 4 C. 5 D. 10
30. C 97 TC > Ch.2 Roof Decks > 2.4 Steel
31
31. Skylights and hatches should be installed with curbs tall enough to allow for an inches of vertical flashing height. A. 4 B. 6 C. 8 D. 10
31. C 273 TC > Ch.8 Roof Accessories > 8.3 Skylights and Roof/Smoke Hatches
32
32. is the time rate of steady-state heat flow through a unit area of material or construction induced by a unit temperature difference between the body surfaces. A. Thermal conductance B. Thermal conductivity C. Thermal resistance D. Thermal transmittance
32. A 132 TC > Ch.4 Rigid Board Insulation > 4.1 Guidelines Applicable to All Insulation Types
33
33. According to the NRCA manual, asphalt shall be applied at a temperature within plus or minus degrees of the equiviscous temperature. A. 10 B. 15 C. 20 D. 25
33. D 192 TC > Ch.5 Roof Membranes > 5.2 Built-Up Roof Membrane
34
34. There are subcategories of common Thermoplastic membranes. A. 4 B. 6 C. 7 D. 2
34. A 216 TC > Ch.5 Roof Membranes > 5.4 Single-Ply Roof Membranes
35
35. Field lap seams when installing EPDM are typically constructed with . A. Durable locks B. Snap caps C. Seam tape D. Heat seams
35. C 217 TC > Ch.5 Roof Membranes > 5.4 Single-Ply Roof Membranes
36
36. A four-way slope, high point of 12 and low point of 3 can provide uniform perimeter . A. Depth B. Width C. Temperature D. Thickness
36. D 176 TC > Ch.4 Rigid Board Insulation > 4.15 Tapered Insulation
37
37. are the fasteners to be used to secure insulation to cementitious wood fiber roof decks. A. Two-piece tube nails B. Self-locking with fasteners with caps C. Twin-lock fasteners with round plates D. All of the above
37. C 241 TC > Ch.6 Attachment > 6.2 Insulation Fasteners
38
38. A minimum of layer(s) reduces the thermal loss that occurs through the joints between single-layer insulation boards. A. One B. Two C. Three D. Four
38. B 138 TC > Ch.4 Rigid Board Insulation > 4.1 Guidelines Applicable to All Insulation Types
39
39. The maximum mop application temperature for Type IV asphalt is °F. A. 350 B. 425 C. 450 D. 470
39. D 191 TC > Ch.5 Roof Membranes > 5.2 Built-Up Roof Membrane
40
40. Currently, asphalts conforming to ASTM D312’s Type and Type are seldom used for built-up membrane construction. A. I, II B. I, III C. I, IV D. II, III
40. A 190 TC > Ch.5 Roof Membranes > 5.2 Built-Up Roof Membrane
41
41. This application method, consisting of plies laid parallel to the slope, is referred to as “strapping the plies” and also may be used on slopes less than . A. 1:12 B. 2:12 C. 3:12 D. 4:12
41. B 199 TC > Ch.5 Roof Membranes > 5.2 Built-Up Roof Membrane
42
42. Which statement is true about bonding thermoset single-ply roofing materials? A. They can be heat-welded like thermoplastics B. They can only be bonded using a liquid-applied adhesive or seam tape C. Once fully cured, they can form new molecular linkages D. They do not require adhesives for bonding
42. B 215 TC > Ch.5 Roof Membranes > 5.4 Single-Ply Roof Membrane
43
43. The following are types of sheets that may be classifies as PVC alloys except for . A. Copolymer Alloy (CPA) B. Ethylene Interpolymer (EIP) C. Nitrile Alloys (NBP) D. Polyestene (PYT)
43. D 218 TC > Ch.5 Roof Membranes > 5.4 Single-Ply Roof Membrane
44
44. Irregularities, such as , should be cut and patched and a thin squeegee coat of hot bitumen be applied before workers leave the work area for the night. A. Blisters B. Fishmouths C. Ridges D. Buckles
44. B 200 TC > Ch.5 Roof Membranes > 5.3 Polymer-Modified Roof Membrane
45
45. For example, a 4-inch-thick concrete slab of normal-weight concrete will release about quart(s) of water for each square foot of surface area. A. ½ B. 1 C. 1 ½ D. 2
45. B 104 TC > Ch. 2 Roof Decks > 2.5 Structural Concrete
46
46. Base flashing height at a prefabricated metal curb should not be lower than inches. A. 8 B. 6 C. 10 D. 5
46. A 375 TC > Ch.10 Construction Details > Index of Construction Details
47
47. Number 2 aggregate ballast is typically applied at a coverage rate of about pounds per 100 square feet for loose-laid ballasted membrane roof systems. A. 1,000 B. 1,300 C. 1,500 D. 1,750
47. B 257 TC > Ch.7 Surfacings > 7.3 Ballast
48
48. When using nails with cementitious wood-fiber, NRCA suggests using . A. Barbed clip fasteners B. Two-piece tube nails C. Three-piece tube nails D. Toggle bolts
48. B 239 TC > Ch.6 Attachment > 6.1 Base Sheet Fasteners
49
49. A narrow-rib steel deck (Type A) is a steel deck panel with a rib-width opening of inch(es) maximum. A. 1 B. 1 ¾ C. 2 D. 2 ½
49. A 92 TC > Ch.2 Roof Decks > 2.4 Steel
50
50. When a design requires steel decks be welded, it is recommended that “puddle welds” of of an inch or larger be welded into steel washers. A. ¼ B. ½ C. 5/8 D. ¾
50. B 94 TC > Ch. 2 Roof Decks > 2.4 Steel
51
51. A typical roof coating can cure by all of the following mechanism except for . A. Solvent evaporation B. Air drying C. Oxidation or reaction with moisture D. Two-component chemical reaction
51. B 259 TC > Ch.7 Surfacings > 7.4 Coatings
52
52. Mineral surfaced cap sheets should be unrolled and allowed to relax . A. For eight hours B. Until soft and pliable C. For four hours D. Until flat
52. D 200 TC > Ch. 5 Roof Membranes > 5.2 Polymer-modified Bitumen Roof Membranes
53
53. The two general categories of membrane roofing systems are and . A. Water shedding and water repellant B. Architectural and field engineered C. Waterproof and water-resistant D. Water shedding and weatherproof
53. D 13 TC > Intro > Membrane Roof Systems
54
54. A thermal transmittance (U or U-factor) of 0.14 is equivalent to an assembly R-value of ____________. A. 8.33 B. 7.69 C. 7.14 D. 6.67
54. C 133 TC > Ch.4 Rigid Board Insulation > 4.1 Guidelines Applicable to All Insulation Types
55
55. When installing insulation board for cement-wood fiber decks, the maximum elevation difference allowed is inch. A. 1/8 B. ½ C. 5/8 D. ¾
55. A 83 TC > Ch.2 Roof Decks > 2.1 Guidelines Applicable to All Roof Decks
56
56. A/an deck is a where roof system components are installed directly over rigid board insulation. A. Nonnailable B. Insulated C. Nailable D. Steel
56. B 16 TC > Ch.1 Roof Assembly Configurations > Introduction
57
57. Vapor retarders should be used to . A. Control the flow of moisture vapor from the interior of the building into the roof system B. Control the flow of moisture vapor from the exterior of the building into the roof system C. Remove the moisture vapor from the interior of the building D. Remove the moisture vapor from the exterior of the building
57. A 127 TC > Ch.3 Air and Vapor Retarders > 3.2 Vapor Retarders
58
58. All of the following are types of rigid roof insulation except for . A. Perlite B. Vermiculite C. Expanded Polystyrene D. Composite board
58. B 131 TC > Ch.4 Rigid Board Insulation > 4.1 Guidelines Applicable to All Insulation Types

Florida Exams (29 decks)

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