Building Engineering Building Engineering MCQ 2

Question 1

What is the primary purpose of a vapor barrier in wall assemblies?

Accepted Answer

To prevent moisture diffusion into the building envelope

Answer

A vapor barrier resists the diffusion of water vapor through wall assemblies, preventing condensation within the assembly.

Question 2

Which ASTM standard governs testing of concrete compressive strength using cylindrical specimens?

Accepted Answer

ASTM C39

Answer

ASTM C39 is the standard test method for compressive strength of cylindrical concrete specimens.

Question 3

In steel construction, what does the term 'moment of inertia' primarily describe?

Accepted Answer

The resistance of a cross-section to bending about an axis

Answer

Moment of inertia (I) quantifies how a cross-section's area is distributed relative to an axis, determining its bending resistance.

Question 4

What is the function of an expansion joint in a concrete slab?

Accepted Answer

To allow thermal expansion and contraction without cracking

Answer

Expansion joints separate sections of concrete so they can move independently due to temperature changes, preventing uncontrolled cracking.

Question 5

According to IBC, what is the minimum live load for office occupancies?

Accepted Answer

40 psf

Answer

The IBC specifies a minimum uniform live load of 50 psf for office areas, though 40 psf is used by some older codes; IBC Table 1607.1 lists 50 psf for offices.

Building Engineering Practice Test

Building Engineering Practice Test

Building Engineering Building Engineering MCQ 2