CNST 251 Chapter 3
in a builing whose structual system consits of columns, beams, and floor and roof slabs, the columns are spaced at 40 ft on center in one direction and 25 ft on center in the other direction. what is the tributary area for an INTERIOR column? a. 1,000 ft^2 b. 1,00 ft c. 500 ft^2 d. 250 ft^2 e none of the above
a. 1,000 ft^2
the floor live load in a residential occupancy is generally assumed to be a. 40psi b. 10psi c. 20psi d. 5psi e. none of the above
a. 40psi
the total approximate gravity load on a floor in a typical wood frame residential building is a. 50 psi b. 30 psi c. 10 psi d. 5 psi e. none of the above
a. 50 psi
which of the following loads can be estimated with greatest certainty? a. dead loads b. live loads c. wind loads d. earthquake loads e. snow loads
a. dead loads
The loads on a floor are generally expressed in a. lb/ft^2 b. lb/ft c. lb d. lb/ft^3 e. non of the above
a. lb/ft^2
the roof live load in a building is generally a. less than the floor live load b. greater than the floor live load c. the same as the floor live load
a. less than the floor live load
in which of the following roofs will you consider the effect of rain load? a. roof with a parapet b. roof without a parapet
a. roof with a parapet
everything else being the same, a building constructed of heavyweight material is subjected to a greater earthquake load than a building constructed of lightweight materials a. true b. false
a. true
for wind blowing along one of the two major axes of a rectangular building, the WINDWARD wall is subjected to positive (toward-the-wall) pressure a. true b. false
a. true
an average tornado strikes a larger area on the ground than a hurricane a. true b. false
b. false
for wind blowing along one of the two major axes of a rectangular building, the LEEWARD wall is subjected to positive (toward-the-wall) pressure a. true b. false
b. false
for wind blowing along one of the two major axes of a rectangular building, the SIDE walls is subjected to positive (toward-the-wall) pressure a. true b. false
b. false
roof live load is a function of the building's occupancy a. true b. false
b. false
The two main categories under which all building loads may be classified are a. dead loads and live loads b. gravity loads and lateral loads c. terrestrial loads and celestial loads d. first class and second class loads
b. gravity loads and lateral loads
The loads on a beam are generally expressed in a. lb/ft^2 b. lb/ft c. lb d. lb/ft^3 e. non of the above
b. lb/ft
the total approximate dead load of a floor is a typical wood frame residential building is a. 50 psi b. 30 psi c. 10 psi d. 5 psi e. none of the above
c. 10 psi
for most of the united states, the design wind speed for an average risk building is a. 95 mph b. 105mph c. 115mph d. 125mph e. 150mph
c. 115mph
a reinforced concrete beam measures 12 in X 24 in in cross section. if the density of reinforced concrete is 150 lb/ft^3, the weight of the beam is a. 450 lb/ft b. 350 lb/ft c. 300 lb/ft d. 300 lb e. 300 lb/ft^3
c. 300 lb/ft
on a leeward wall, the wind pressure a. increases with height above the ground b. decreases with height above the ground c. is almost constant with height above the ground
c. is almost constant with height above the ground
The loads on a column are generally expressed in a. lb/ft^2 b. lb/ft c. lb d. lb/ft^3 e. non of the above
c. lb
which of the following occupancies has the highest floor live load? a. classrooms b. hotel guest rooms c. library stack rooms d. library reading rooms e. offices
c. library stack rooms
according to the geologist, the earth's surface is composed of several segments that are called a. earth segments b. surface plates c. tectonic plates d. geological segments e. segmental plates
c. tectonic plates
in a builing whose structual system consits of columns, beams, and floor and roof slabs, the columns are spaced at 40 ft on center in one direction and 25 ft on center in the other direction. what is the tributary area for a CORNER column? a. 1,000 ft^2 b. 1,00 ft c. 500 ft^2 d. 250 ft^2 e none of the above
d. 250 ft^2
the design wind speed for a location is the peak a. 60-s gust speed b. 10-s gust speed c. 5-s gust speed d. 3-s gust speed e. 1-s gust speed
d. 3-s gust speed
the design snow load on a roof is a fraction of a. ground snow load on the location b. roof slope c. wind exposure classification of the site d. all of the above e. both a and b
d. all of the above
highest wind speeds are usually obtained in a. hurricanes b. wind storms c. thunderstorms d. tornadoes
d. tornadoes
the region of the united states that is relatively more earthquake prone is the a. northern united states b. southern united states c. eastern united states d. western united states e. none of the above
d. western united states
the design wind speed is also referred to as the a. standard wind speed b. official wind speed c. uniform wind speed d. straight-line wind speed e. basic wind speed
e. basic wind speed
with respect to wind pressure, a building site is classified in terms of a. exposures A B C D b. exposures A B C c. exposures X Y Z d. exposures P Q R S e. exposures B C D
e. exposures B C D
an earthquake measuring 7.0 on the Richter scale is a. twice as strong as a 6.0 earthquake b. 10 times stronger than a 6.0 earthquake c. 100 times larger than a 6.0 earthquake d. 500 times larger than a 6,0 earthquake e. non of the above
e. non of the above
the design wind speed for an average-risk building at a location has a probability of occurrence of a. once in 300 years b. once in 200 years c. once in 100 years d. once in 50 years e. none of the above
e. none of the above
The number of mild (minor to very minor) earthquakes occurring on the earth is almost a. 1 or 2 per year b. 10 to 20 per year c. 100 per year d. 1,000 per year e. several thousand per year
e. several thousand per year