Test 1 (E) Flashcards
A mass diagram is used in water supply computations to determine the
A. size of the area that will be flooded when a dam is built
B. capacity of a reservoir required to supply the demand for water
C. volume of excavation required to clear the site for a reservoir
D. rate of flow of water into a reservoir
B. capacity of a reservoir required to supply the demand for water
ADD FROM TEST 1 (E)
A force of 200 lbs. and a force of 300 lbs. make an angle of 30 degrees with each other. The value of the resultant force is, in lbs., Most Nearly
A. 483
B. 48
C. 493
D. 513
A. 483
A chemical commonly used for coagulation in a water purification plant is
A. alum
b. caustic ash
c. potash
d. saltpeter
A. alum
The consistency of a concrete mix is measured with a
a. water meter
b. viscometer
c. slump cone
d. vicat needle
c. slump cone
The term 4000 pound concrete commonly means
a. one cubic yard of concrete weigh approximately 4000 pounds
b. the allowable stress in compression in the concrete is 4000 lb./sq.in.
c. the concrete has a minimum ultimate strength in compression of 4000 lb./sq.in. at 28 days
d. the concrete can carry a bond stress of 4000lb./sq.in.
c. the concrete has a minimum ultimate strength in compression of 4000 lb./sq.in. at 28 days
ADD QUESTION 7
ADD QUESTION 8
ADD QUESTION 9
The sine of 120 degrees is the same as the sine of
A. 45 degrees
B. 60 degrees
C. 45 degrees, but with a negative sign
D. 60 degrees, but with a negative sign
B. 60 degrees
The formula for the area of a triangle is
A. 1/2 ab Sin A
B. 1/2 bc Sin A
C. 1/2 ac cos A
D. 1/2 ab cos A
B. 1/2 bc Sin A
The logarithm of 7 is approximately 0.845. The logarithm of (0.007)^1/4 is approximately
A. 9.343-10
B. 9.567-10
C. 9.461-10
D. 9.561-10
C. 9.461-10
The center of gravity of a triangle is located at the intersection of the
A. angle bisectors
B. medians
C. perpendicular bisectors of the sides
D. radians
B. medians
The distance between two stations was measured size times and the average distance was found to be 346.215 ft. If one measurement of 351.205 ft. is deleted from the data as being inconsistent with the other measurements, then the average of the remaining five measurements is, in ft.,
A. 345.217
B. 345.221
345.227
345.235
A. 345.217
A map of an area of 380 ft. x 740 ft. is to be plotted on a sheet of drawing paper. The smallest sheet of paper required to plot this map to a scale of 1” = 50’, leaving one inch margin all around, is, in inches,
A. 8.5 x 11
B. 10 X 17
C. 12 X 17
D. 10 X 15
B. 10 X 17
On a topographic map, widely spaced contour lines indicate
A. a gentle slope
B. a steep slope
C. an overhanging cliff
D. the bank of a stream
A. a gentle slope
The scale to which a map is drawn is 1” = 800’. Of the following, the most common method by which this scale would be indicated on the map is
A. 1/800
b. 1” = 9600”
C. 8.0” = 1 mile
D. 1/9600
D. 1/9600
The angle formed between one line and the prolongation of the preceding line in a closed traverse is known as a(n) ____ angle.
A. split
B. obtuse
C. direction
D. deflection
D. deflection
When laying out a horizontal circular curve, the deflection angle for a 100 ft. chord is equal to
A. one-quarter of the degree of curvature
B. one-half of the degree of curvature
C. three-quarters of the degree of curvature
D. the degree of curvature
B. one-half of the degree of curvature
For a given intersection angle, tables of the functions of a one degree curve show the tangent distance to be 1062.0 ft. For the same intersection angle and a curvature of 4 degrees, the tangent distance is, in feet, most nearly,
A. 265.5
B. 437.9
C. 649.3
D. 1153.4
A. 265.5
ADD QUESTION 21
ADD QUESTION 22
A simple beam on a 16’ span carries a concentrated load of 10,000 pounds. If the maximum bending moment in the beam is 465,000 inch pounds, the distance from the load to the nearer support is, in feet, most nearly,
A. 6.1
B. 6.3
C. 6.6
D. 6.9
C. 6.6
The section modulus of a rectangular beam 6 inches wide and 12 inches deep is, in inches cubed,
A. 24
B. 48
C.96
D. 144
D. 144
A 6” x 8” timber (actual size) is to be used as a beam on a simple span. If the 8-inch side is vertical rather than the 6-inch side, the beam is NOT
A. stronger in bending
B. stronger in shear
C. stiffer
D. more efficient
B. stronger in shear
A 6” x 8” timber (actual size) is being used as a gin pole. The radius of the gyration of this column which would be used in a column formula to determine the safe load for the gin pole is, in inches, MOST NEARLY
A. 1.73
B. 1.87
C. 1.93
D. 2.13
A. 1.73
A steel rod 25’0” long and 1 inch square in cross-section, fastened to solid supports, is under a tension of 18,000lb./sq.in. If one of the supports yields 0.14 inches, the resultant tension in the bar will be, in pounds per square inch, MOST NEARLY (E = 30X10^6 lb./sq.in.)
A. 3800
B. 4000
C. 4200
D. 4400
B. 4000
A round steel bar, one inch in diameter and three feet long, is elongated 0.022 inches by a load applied at one end of the bar. The magnitude of the load is, in lbs., MOST NEARLY (E = 30 X 10^6 lb./sq.in.)
A. 14,200
B. 14,400
C. 14,600
D. 14,940
B. 14,400
A short hollow steel cylinder with a wall thickness of 1.5 inches is to carry a compressive load, applied uniformly on the end, of 1,750,000lb. If the allowable working stress in steel in compression is 20,000 lb./sq.in., then the minimum outside diameter of the cylinder required to safely support this load is, in inches, MOST NEARLY
A. 19.4
B. 19.8
C. 20.0
D. 20.2
C. 20.0
ADD QUESTION 30
ADD QUESTION 31
The modulus of elasticity of aluminum is one-third that of steel. This means that
A. Steel is three times as strong as aluminum
B. aluminum is lighter than steel
C. aluminum is three times as strong as steel
D. for equal stress intensities, the unit strain in aluminum is three times that in steel.
D. for equal stress intensities, the unit strain in aluminum is three times that in steel.
ADD QUESTION 33
ADD QUESTION 34
ADD QUESTION 35
ADD QUESTION 36
ADD QUESTION 37
A 6-inch pipe line is horizontal from point A to point B, the distance AB being 2000 feet. At A, the hydraulic gradient is 10 feet above the pipe; at B it is 2 feet below the pipe. The head lost per thousand feet is, in feet,
A. 1
B. 2
C. 7
D. 6
D. 6
A canal is to have a cross-sectional area of 60 square feet. If a square cross-section is used, the hydraulic radius of the canal when flowing full will be, in feet, MOST NEARLY,
A. 2.41
B. 2.45
C. 2.51
D. 2.58
D. 2.58
If one cubic foot of cement weighs 94 pounds and the specific gravity of the cement particles is 3.10, the void ratio (ratio volume of voids to volume of solids) is MOST NEARLY
A. 0.89
B. 0.96
C. 1.03
D. 1.06
D. 1.06
