MArch Master of Architecture Construction Materials & Methods

Question 1

What is the primary characteristic that differentiates Type I (Normal) Portland cement from Type III (High Early Strength) Portland cement?

Accepted Answer

Type III has a finer grind and higher C3S content, achieving strength faster but generating more heat of hydration

Answer

Type III uses less water in the mix

Answer

Type I contains added pozzolanic materials for sustainability

Answer

Type III is used exclusively for precast applications

Question 2

In steel construction, what does a 'W8×31' designation indicate about a structural member?

Accepted Answer

A wide-flange section approximately 8 inches deep weighing 31 pounds per linear foot

Answer

A welded plate girder 8 feet tall with a 31-kip capacity

Answer

A wide-flange section 31 inches deep with an 8-kip capacity

Answer

A steel wire rope with 8 strands weighing 31 lbs per 100 feet

Question 3

Cross-Laminated Timber (CLT) panels are manufactured by:

Accepted Answer

Gluing layers of dimensional lumber with alternating grain orientations perpendicular to each other

Answer

Kiln-drying solid timber planks to very low moisture content

Answer

Combining wood fibers with synthetic resins under high pressure

Answer

Steam-bending large-format solid timber into structural panels

Question 4

The term 'thermal bridging' in building envelope design refers to:

Accepted Answer

High-conductivity elements (such as metal studs) that bypass insulation and allow heat to flow through the envelope

Answer

A design strategy to connect solar thermal collectors across the building skin

Answer

Radiant heat distribution through floor slab systems

Answer

The transfer of heat between a building's floors via the HVAC duct system

Question 5

In masonry construction, what is the primary structural purpose of a steel lintel above a window or door opening?

Accepted Answer

To carry the masonry loads above the opening and transfer them to the jambs on either side

Answer

To support the window frame and prevent air infiltration

Answer

To provide a nailing surface for interior trim

Answer

To serve as a flashing support at the head of the opening

Question 6

The concept of 'integral waterproofing' (crystalline waterproofing) added to concrete differs from membrane waterproofing primarily because:

Accepted Answer

It reacts with water and cement compounds to form crystals within the concrete matrix itself, blocking capillary passages

Answer

It is applied as a sheet membrane bonded to the exterior surface

Answer

It requires an air gap between the concrete and the waterproofing layer

Answer

It is a spray-applied elastomeric coating that bridges cracks