CSLB C-39 Roofing (Trade Exam) — All Questions

Under the Fire Code, where must the attendant of an operating asphalt kettle be?

• a.Within 100 feet, in sight✓
• b.Anywhere on the roof above it
• c.Inside the truck cab
• d.Within 500 feet by radio

An operating kettle must be attended by at least one knowledgeable employee within 100 feet who has the kettle within sight, with no ladder in the route.2025 CFC 303.4

What is the maximum capacity of a hi-boy used to carry hot asphalt on a roof?

• a.100 gallons
• b.55 gallons✓
• c.20 gallons
• d.9-1/2 gallons

The Fire Code limits hi-boys to 55 gallons, requires noncombustible construction, and allows no heat source as part of a hi-boy.2025 CFC 303.7

A crew wants to tow a kettle to the next job with the burner running to save heating time. What does the Fire Code say?

• a.Allowed if the lid is closed
• b.Not allowed on any road✓
• c.Allowed with a flag car
• d.Allowed below 25 mph

Asphalt kettles may not be transported over any highway, road or street while the heat source is operating, except kettles patching road surfaces.2025 CFC 303.1

Asbestos-containing roofing is being removed next to rooftop air handlers. What must be done with the air intakes?

• a.Isolate them or shut the system down✓
• b.Nothing if the crew wears respirators
• c.Point a fan at them
• d.Tape a sign on each unit

During removal of asbestos-containing roofing, roof-level heating and ventilation air intake sources must be isolated or the ventilation system shut down.Cal. Code Regs. tit. 8 §1529

Two crews each remove 15 square feet of intact asbestos-containing roofing on the same roof on the same day. Does the under-25-square-foot allowance apply?

• a.Yes, if the crews use different tools
• b.Yes, if the work is on different slopes
• c.No; count all same-day work✓
• d.Yes; each crew is under 25 sq ft

In deciding whether a job is under 25 square feet, the employer must count all removal and repair work performed on the same roof on the same day. Together the crews remove 30 square feet.Cal. Code Regs. tit. 8 §1529

An existing roof covering is water soaked and no longer an adequate base. The owner asks for a recover. What does the code say?

• a.A recover is allowed after one week of drying
• b.A recover is allowed with a new base sheet
• c.A recover is allowed if the new roof is metal
• d.A recover is not permitted✓

A roof recover is not permitted where the existing roof or roof covering is water soaked or deteriorated to the point it is not an adequate base for additional roofing.2025 CRC R908.4

Which new system may be installed over an existing roof covering without removing it, because it carries its own loads to the structure?

• a.Shingles over two existing layers
• b.Clay tile over existing slate
• c.A separate standing-seam system✓
• d.Wood shakes over existing clay tile

Complete and separate roofing systems, such as standing-seam metal systems that transmit loads directly to the structure and do not rely on the existing roof, do not require removal of existing coverings.2025 CRC R908.4

What does the CRC mean by a roof replacement?

• a.Replacing only damaged shingles
• b.Coating the existing roof surface
• c.Removal down to the deck✓
• d.Adding a new layer over the old one

Roof replacement includes the removal of existing layers of roof coverings down to the roof deck. Installing a new covering over the old one is a recover.2025 CRC R908.3

An existing ice barrier membrane is well adhered to a sound, dry deck. During replacement, what may the roofer do with it?

• a.Cover it with more ice barrier, if permitted✓
• b.Leave it exposed as the finished roof
• c.Cover it with wood shakes directly
• d.Always grind it off the deck

Where an adhered ice barrier is on sheathing that is not water soaked or deteriorated, it may remain and be covered with an additional ice barrier layer where the roof covering and ice barrier manufacturers permit.2025 CRC R908.3 exception

During a ballasted single-ply reroof, some of the existing ballast stones are cracked. What may be done with them?

• a.Reinstall them at the roof corners
• b.Reinstall them under the new membrane
• c.Reinstall them if painted
• d.They may not be reinstalled✓

Existing ballast that is damaged, cracked or broken shall not be reinstalled under the CBC's reroofing section.2025 CBC 1512.4

A walkway is provided past a roofing job for pedestrians. What is its minimum width?

• a.2 feet
• b.4 feet✓
• c.6 feet
• d.3 feet

Walkways must be of sufficient width for the pedestrian traffic but not less than 4 feet wide, with a durable walking surface.2025 CBC 3306.2

Where may pallets of roof tile be staged next to a neighbor's property line?

• a.Where no one or nothing is endangered✓
• b.Anywhere on the owner's lot
• c.In the neighbor's driveway overnight
• d.Against the neighbor's fence to save space

Construction equipment and materials must be stored and placed so as not to endanger the public, the workers or adjoining property for the duration of the project.2025 CBC 3301.2

When may an overhead conductor near a roofing job be treated as de-energized?

• a.When it sags below the roof edge
• b.When it looks old and unused
• c.When the homeowner says it is off
• d.After owner verification and visible grounding✓

Any overhead conductor is considered energized unless and until the person owning or operating the line verifies it is not energized and the line is visibly grounded at the work site.Cal. Code Regs. tit. 8 §2946(d)