Chapter 3&4

A 20-ft-high column shortens by 0.6 in. under a load. What is the resulting strain in the column? 0.0020 None of these 0.0020 in. 0.0025 0.0025 in.

0.0025

A rectangular column measuring 12 in. × 12 in. in cross section carries a load of 18 kips. What is the stress in the column? 18 ksi 2.25 ksi 18 kips 125 psi None of these

125 psi

Which of the following loads can be estimated with greatest certainty? Wind loads Snow loads Earthquake loads Dead loads Live loads

Dead loads

In most materials, the safety margin for compressive stress and bending stress is the same. True False

False

Roof live load is a function of the building's occupancy. True False

False

Which of the following beam cross sections is structurally more efficient in bending? I-section Rectangular (solid) sectio

I-section

The design wind speed for an average-risk building at a location has a probability of occurrence of once in 200 years. once in 50 years. once in 100 years. None of these. once in 300 years.

None of these.

Everything else being the same, a building constructed of heavyweight materials is subjected to a greater earthquake load than a building constructed of lightweight materials. True False

True

In a typical stress-strain diagram of a material, the stress is generally plotted along the vertical axis. True False

True

The design wind speed is also referred to as the basic wind speed. uniform wind speed. straight-line wind speed. standard wind speed. official wind speed.

basic wind speed.

The horizontal blocking in wood studs helps prevent shear failure of studs. buckling of studs. compressive failure of studs. tensile failure of studs.

buckling of studs.

On a leeward wall, the wind pressure increases with height above the ground. decreases with height above the ground. is almost constant with height above the ground.

is almost constant with height above the ground.

The loads on a beam are generally expressed in lb. lb/ft. None of these. lb/ft^2 lb/ft^3

lb/ft

The loads on a floor are generally expressed in lb/ft. None of these. lb. lb/ft^3 lb/ft^2

lb/ft^2

The number of mild (minor to very minor) earthquakes occurring on the earth is almost 1,000 per year. 10 to 20 per year. 100 per year. 1 or 2 per year. several thousand per year.

several thousand per year.

When we determine the strength of concrete using the test specimens, we determine the concrete's modulus of elasticity. ultimate compressive stress. All of these. ultimate shear stress. ultimate tensile stress.

ultimate compressive stress.