IIBEC RRO CERTIFICATION TEST QUESTIONS
WITH 100% CORRECT ANSWERS
◉ Who controls the delivery, storage, and handling required for
project materials? Answer: The contractor
◉ Who is responsible for providing the RRO with personal
protection equipment? Answer: RRO's employer
◉ A contractor is installing an SPF roof. At a minimum, how many
degrees should the ambient temperature be above the dew point for
this roof? Answer: 5 degrees F [2.8 degrees C]
◉ A __________ measures thickness of the coating during application.
Answer: Wet mil gauge
◉ According to NRCA, which two metals are solderable? Answer:
Galvanized steel and stainless steel
◉ When installing fire- and pressure-treated wood shake and
shingles, which nail must be used? Answer: 316 SS (stainless steel)
,◉ Which two deck types are considered nailable? Answer: Wood,
plywood, and OSB
◉ The RRO is observing the Contractor install a 1/2" (13 mm) wood
fiber cover board over the base layer of insulation; however the
Construction Documents state that a 3/4" (19 mm) perlite cover
board is to be installed. What should the RRO do? Answer: Notify the
Contractor, record the deviation and contact the Designer Authority.
◉ How would a change to the Specifications be made prior to the
submittal of bids? Answer: Addendum
◉ What seaming procedure is appropriate for TPO membranes?
Answer: Hot air welding
◉ The RRO observes that the temperature of the roofing asphalt at
the point of application is too low. How should the RRO determine
what the proper asphalt temperature at the point of application is?
Answer: Review the EVT of the asphalt.
◉ What could be a cause of blistering on an SBS roof? Answer: Voids
in the interply moppings
◉ What surface textures are acceptable for SPF? Answer: Smooth,
orange peel, coarse orange peel, or verge of popcorn
, ◉ Per OSHA, what is the proper distance from the wall that the base
of a ladder should be placed? Answer: 1/4 the working height
◉ Who would document and quantify unforeseen conditions?
Answer: RRO
◉ The RRO is reviewing the installation of a roof system over a steel
deck. The RRO observes that the deck has been modified in order to
accommodate the installation of piping with an opening between 8
in. to 13 in. (200 mm to 325 mm) in diameter. The RRO is concerned
about the integrity of the deck around this opening. What action
should the RRO take? Answer: Document the condition and contact
the Designer of Record for direction.
◉ A roof is 85 squares in area. The Contractor has 1/8th of the total
roof left to complete. What area has been completed so far? Answer:
7,438 sq. ft.
◉ When installing asphalt shingle on a plywood deck, what is the
MINIMUM depth the nails should penetrate through the plywood
deck? Answer: 1/8" (3 mm)
WITH 100% CORRECT ANSWERS
◉ Who controls the delivery, storage, and handling required for
project materials? Answer: The contractor
◉ Who is responsible for providing the RRO with personal
protection equipment? Answer: RRO's employer
◉ A contractor is installing an SPF roof. At a minimum, how many
degrees should the ambient temperature be above the dew point for
this roof? Answer: 5 degrees F [2.8 degrees C]
◉ A __________ measures thickness of the coating during application.
Answer: Wet mil gauge
◉ According to NRCA, which two metals are solderable? Answer:
Galvanized steel and stainless steel
◉ When installing fire- and pressure-treated wood shake and
shingles, which nail must be used? Answer: 316 SS (stainless steel)
,◉ Which two deck types are considered nailable? Answer: Wood,
plywood, and OSB
◉ The RRO is observing the Contractor install a 1/2" (13 mm) wood
fiber cover board over the base layer of insulation; however the
Construction Documents state that a 3/4" (19 mm) perlite cover
board is to be installed. What should the RRO do? Answer: Notify the
Contractor, record the deviation and contact the Designer Authority.
◉ How would a change to the Specifications be made prior to the
submittal of bids? Answer: Addendum
◉ What seaming procedure is appropriate for TPO membranes?
Answer: Hot air welding
◉ The RRO observes that the temperature of the roofing asphalt at
the point of application is too low. How should the RRO determine
what the proper asphalt temperature at the point of application is?
Answer: Review the EVT of the asphalt.
◉ What could be a cause of blistering on an SBS roof? Answer: Voids
in the interply moppings
◉ What surface textures are acceptable for SPF? Answer: Smooth,
orange peel, coarse orange peel, or verge of popcorn
, ◉ Per OSHA, what is the proper distance from the wall that the base
of a ladder should be placed? Answer: 1/4 the working height
◉ Who would document and quantify unforeseen conditions?
Answer: RRO
◉ The RRO is reviewing the installation of a roof system over a steel
deck. The RRO observes that the deck has been modified in order to
accommodate the installation of piping with an opening between 8
in. to 13 in. (200 mm to 325 mm) in diameter. The RRO is concerned
about the integrity of the deck around this opening. What action
should the RRO take? Answer: Document the condition and contact
the Designer of Record for direction.
◉ A roof is 85 squares in area. The Contractor has 1/8th of the total
roof left to complete. What area has been completed so far? Answer:
7,438 sq. ft.
◉ When installing asphalt shingle on a plywood deck, what is the
MINIMUM depth the nails should penetrate through the plywood
deck? Answer: 1/8" (3 mm)
