CITB Construction Methods and Materials 5

Question 1

What is the term for concrete placed at near-freezing temperatures that requires special protection measures?

Accepted Answer

Cold-weather concrete

Answer

Cold-weather concrete, defined by ACI 306 as placement when ambient temperature is below 40°F, requires measures like heated materials and insulating blankets to ensure proper hydration.

Question 2

In structural steel fabrication, what does 'camber' refer to?

Accepted Answer

A deliberate upward pre-bend in a beam to offset anticipated deflection under load

Answer

Camber is an intentional upward curvature built into steel beams during fabrication so that once dead loads are applied, the beam deflects to a level position.

Question 3

Which type of wall is defined as carrying both its own weight and loads from floors or roofs above?

Accepted Answer

Load-bearing wall

Answer

A load-bearing wall is a structural element designed to carry gravity loads from floors, roofs, and walls above and transfer them to the foundation.

Question 4

What is the purpose of a 'shot-fired' or powder-actuated tool on a construction site?

Accepted Answer

To fasten materials like track or conduit directly to concrete or steel using explosive charges

Answer

Powder-actuated tools use a controlled explosive charge to drive hardened fasteners directly into concrete, masonry, or steel, eliminating the need for pre-drilled holes in many applications.

Question 5

In wood-frame construction, what is the function of blocking installed between floor joists?

Accepted Answer

All of the above

Answer

Blocking between floor joists serves multiple functions simultaneously: it transfers lateral loads, prevents joist rotation and buckling, provides edge nailing for sheathing, and acts as a fire stop.

(CITB) Construction Industry Training Board Practice Test

(CITB) Construction Industry Training Board Practice Test

CITB Construction Methods and Materials 5