CITB Construction Methods and Materials 3

Question 1

What is the primary advantage of using fly ash as a partial cement replacement in concrete?

Accepted Answer

It improves workability and reduces heat of hydration

Answer

It dramatically accelerates early strength gain

Answer

It reduces long-term strength

Answer

It eliminates the need for water in the mix

Question 2

In masonry construction, what is the purpose of a control joint?

Accepted Answer

To allow for planned cracking due to thermal or shrinkage movement

Answer

To strengthen the wall against lateral loads

Answer

To provide drainage for water infiltration

Answer

To anchor masonry veneer to the structural backing

Question 3

Which roofing system uses a continuous membrane adhered or mechanically fastened to the roof deck?

Accepted Answer

Single-ply membrane (TPO/EPDM)

Answer

Built-up roofing (BUR)

Answer

Metal standing seam

Answer

Asphalt shingle

Question 4

What does the term 'pile driving refusal' mean on a construction site?

Accepted Answer

The point at which a pile cannot be driven further because it has reached load-bearing soil or rock

Answer

A pile that cannot be ordered in time

Answer

A pile that fails inspection and is rejected

Answer

When a crane operator refuses to drive piles due to weather

Question 5

In concrete formwork design, what is the primary factor determining the lateral pressure exerted on vertical forms?

Accepted Answer

The rate of concrete placement and concrete unit weight

Answer

The temperature of the water used in the mix

Answer

The type of aggregate used

Answer

The number of form ties installed

Question 6

Which type of floor system is most commonly used to achieve long spans with minimal structural depth in commercial construction?

Accepted Answer

Composite steel deck with concrete topping

Answer

Flat plate concrete slab

Answer

Wood joist system

Answer

Brick arch floor system

Question 7

What is the key difference between 'cut and fill' and 'balanced earthwork' on a grading project?

Accepted Answer

Balanced earthwork means excavated (cut) material equals the fill needed, minimizing import/export

Answer

Cut and fill uses only excavated material; balanced earthwork imports all fill

Answer

Cut and fill always requires sheeting; balanced earthwork does not

Answer

Balanced earthwork is only used in highway construction