CSLB C-53 Swimming Pool (Trade Exam) — All Questions
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107 questions
A crew checks a corner with a 3-4-5 triangle scaled up to a 9-foot leg and a 12-foot leg. What must the diagonal measure?
- a.21 feet
- b.18 feet
- c.225 feet
- d.15 feet✓
The 3-4-5 triangle scaled by 3 is 9-12-15, and the diagonal is the square root of (81 + 144) = the square root of 225 = 15 feet. The figure 21 adds the legs, 18 doubles the short leg, and 225 forgets the square root.CSLB C-53 study guide 13E-53 (computation questions)
At pre-deck in one city, how are the four deck bonding wires brought from pre-gunite handled?
- a.Cut off once the shell is bonded
- b.Left coiled at the equipment pad
- c.Welded together at one corner of the deck
- d.Connected to the bonding grid at four locations✓
The four deck bonding wires provided at pre-gunite are connected in four locations to the bonding grid with approved clamps or other approved methods. Joining them at one corner, coiling them or cutting them off leaves the grid unbonded.City builder guide (Menifee)
Which object must get a #8 copper bond wire to the shell at the pre-deck inspection?
- a.A plastic planter 4 feet from the water
- b.A metal patio cover 4 feet from the water✓
- c.A metal shed 20 feet from the water
- d.A wooden bench 3 feet from the water
Metal objects within 5 feet of the water's edge, such as handrails, slides, diving boards, metal patio covers and metal fencing, are bonded with a minimum #8 copper wire to the pool shell. A plastic planter and a wooden bench are not metal, and a shed 20 feet away is outside the 5-foot zone.City builder guide (Menifee)
How must fittings and damaged areas on factory-coated black iron gas pipe be treated underground?
- a.Wrapped to a minimum of 40 mil✓
- b.Left bare so leaks show up
- c.Covered with a layer of loose sand
- d.Painted with ordinary house paint
Fittings, couplers, joints, elbows and damaged areas on the factory coating are wrapped with a minimum 40 mil. Leaving them bare, house paint and loose sand do not protect against corrosion.City builder guide (Menifee)
What rating must outdoor electrical wiring for a pool have in one city's guide?
- a.Rated for wet and damp areas, such as THWN✓
- b.Rated only for temporary use on site
- c.No rating, since the wiring is in conduit
- d.Rated for dry indoor use, such as NM cable
All outdoor installations of electrical wiring must be rated for use in wet and damp areas such as THWN. Dry-location cable, temporary-use wire and unrated wire in conduit do not meet it.City builder guide (Menifee)
What does the shotcrete association say helps roughen and clean an old surface before new shotcrete?
- a.A garden hose rinse followed by troweling
- b.A bonding agent brushed on first
- c.A coat of paint to seal the old surface
- d.A high-pressure water blaster or abrasive blasting✓
The FAQ says a high-pressure water blaster or abrasive blasting can help roughen and clean the surface. A hose rinse with troweling smooths rather than roughens, paint seals the surface, and a bonding agent interferes with the natural bond.American Shotcrete Association Pool FAQ
Whom does the association recommend to place the shotcrete?
- a.An ACI-certified nozzleman✓
- b.Any laborer who has handled a hose
- c.A tile setter between jobs
- d.The pool owner, under supervision
The FAQ recommends an ACI-certified shotcrete nozzleman. An untrained laborer, an owner and a tile setter lack that certification.American Shotcrete Association Pool FAQ