CSLB B Trade 622 Questions with Correct Answers

CSLB B Trade 622 Questions with Correct Answers

2024/2025

Lightweight concrete is BEST used at the:

• curb & gutter
• second floor decking
• first floor slab on grade
• footings - Correct Answer B.

Second floor decking.It is costly, but very strong. It offers greatest advantage when used for upper stories because it reduces the strength requirements for the supporting framework.What tool do you normally use for striking joints?

• haulk
• trowel
• jointer or jointing tool
• stiff brush - Correct Answer B.

A trowel is normally used for striking joints.What is a bush-hammer used for?

• install bushings on a wheel
• roughen surfaces of hardened concrete
• straighten metai sheeting
• pull objects with impact action - Correct Answer B.

Roughen the surface of hardened concrete.It is a hardened steel tool with a serrated face or several rows of pyramid-shaped points. It is used to roughen the surface of hardened concrete to provide better bonding of fresh concrete poured over it.Who decides if 3,000 psi strength concrete is fit to pour?

• structural engineer 1 / 4

• supplier
• concrete contractor
• building inspector - Correct Answer A.

Structural engineer.psi = pounds per square inch

Concrete should be poured against:

A any wood siding

• cedar or redwood siding only
• metal flashing
• metal form material - Correct Answer D.

Metal form material.When metal forms are not used, only "Form Grade" plywood, not siding, should be used in the wood forms.How soon should you pour concrete after you have mixed it without additives?

• 1/2 hour
• 1 hour
• 4 hours
• 8 hours - Correct Answer A.

1/2 hour.You should begin placing concrete within 30 minutes of mixing, and it MUST be placed within 90 minutes to prevent the concrete from becoming too stiff and difficult to place and finish.

In cold climates, you cover freshly poured concrete to:

• prevent hydration
• prevent discoloration
• prevent warping 2 / 4

• prevent freezing - Correct Answer D.

Prevent freezing.In order to hold in the heat, long enough for curing.When should you trowel concrete?

• when just poured
• 1 hour after pouring
• when concrete becomes firm, several hours after pour
• after 24 hours - Correct Answer C.

You should trowel concrete several hours after pour when concrete becomes firm.

A vapor barrier might not be needed between wood and concrete:

• if the concrete is older than one year
• with a moisture-proof sealer on the wood
• A and B
• neither A nor B, it will always be needed - Correct Answer C. A and B

How many cubic yards of cement are required for a circle 4in thick, with a circumference of 10ft?

• 1/10 yd3
• 1/5 yd3
• 1/2 yd3
• 1 yd3 - Correct Answer A.

1/10 yd3 Volume = area x thickness Area of a circle = pr2 r = circumference + 2p r = 10 + 2p p=3.14 r= 10 + 6.28 =1.59 ft 3 / 4

Area of a circle = pr2 Area:::: p (1.59)2 == 3.14 x 1.59 x 1.59 Area== 7.94 Volume = area x thickness 4" + 12" per foot == 0.33333' Volume== 7.94 x 0.33:::: 2.62 ft3 Conver to yards 2.62 + 27 =::.097 yd3 Round to 0.10 yd or 1/10 What is the correct procedure when drilling concrete?

• use steady, medium pressure
• periodically pull back to let dust escape
• A&B
• concrete should never be drillled - Correct Answer C. A&B

What is the MINIMUM size for anchor bolts?

• 1/4"
• 1/2"
• 3/4"
• 1" - Correct Answer B. 1/2"

What is the MINIMUM depth for a one-story foundation?

• 8"
• 12"
• 18"
• 24" - Correct Answer B. 12"

How do you normally secure a wood frame house to its foundation?

• embed the frame in the concrete foundation
• anchor the frame to the concrete foundation
• adhere the frame to the foundation
• / 4