#60.
A sample of saturated soil weights 588 N and has a volume of 0.003 m3. If the void ratio of the soil is 0.75, determine the specific gravity of the solids.
A
2.70
B
2.75
C
2.67
D
2.57
Answer: 2.75
#61.
A clay sample has a unit weight of 21.1 kN/m3 at a moisture content of 9.80%. When completely saturated with water, its unit weight is 22.58 kN/m3. What is the porosity of the soil?
A
34.3%
B
33.4%
C
32.4%
D
33.3%
Answer: 34.3%
#62.
A specimen of moist clay has a mass of 183.4 grams. After drying, the mass is reduced to 157.7 grams. What is the moisture content of the sample.
A
17.3%
B
18.6%
C
16.3%
D
15.2%
Answer: 16.3%
#63.
A sample moist clay is found to have moisture content of 4005 and degree of saturation of 85%. The specific gravity of soil solids is 2.76. What is the void ratio of this soil.
A
12.99
B
9.28
C
9.38
D
12.0
Answer: 12.99
#64.
A sample of moist soil has water content of 18% and moist unit weight of 17.3 kN/m3. The specific gravity of solids is 2.65. Compute the degree of saturation of the soil.
A
77.32%
B
47.7%
C
61.7%
D
71.7%
Answer: 61.7%
#65.
A hand-carved sample of soft saturated clay weighs 350 grams and has a volume of 200 cc. After oven drying, it weighs 240 grams. What is its moisture content?
A
45.83%
B
17.5%
C
26.7%
D
35.6%
Answer: 45.83%
#66.
A hand-carved sample of soft saturated clay weighs 350 grams and has a volume of 200 cc. After oven drying, it weighs 240 grams. What is the specific gravity of the solid?
A
2.76
B
2.67
C
2.57
D
2.75
Answer: 2.67
#67.
A hand-carved sample of soft saturated clay weighs 350 grams and has a volume of 200 cc. After oven drying, it weighs 240 grams. What is the porosity in percent?
A
50%
B
55%
C
60%
D
65%
Answer: 55%
#68.
A soil sample was compacted. The result of the standard proctor test shows that at 100% compaction, the soil weighs 131.1 pcf with optimum moisture content of 14%. What is the saturated unit weight of the soil in pcf? use G=2.67
A
135.33 pcf
B
134.32 pcf
C
132.32 pcf
D
133.23 pcf
Answer: 134.32 pcf
#69.
A soil sample has a bulk unit weight of 19.6 kN/m3 at a water content of 10%. What is the percentage air in the voids, if G=2.7?
A
54.5%
B
45.5%
C
44.5%
D
55.5%
Answer: 44.5%
#70.
If the specific volume of a certain gas is 0.7848 m3/kg, what is its specific weight?
A
7.8 N/m3
B
12.5 N/m3
C
12.74 N/m3
D
40.9 N/m3
Answer: 12.5 N/m3
#71.
What is the specific weight of air at 480 kPa absolute and at 21oC?
A
56. 89 N/m3
B
65. 89 N/m3
C
55.81 N/m3
D
81.98 N/m3
Answer: 55.81 N/m3
#72.
Find the mass density of helium at a temperature of 4 oC and a pressure of 184 kPa gage, if atm pressure is 101.92 kPa. (R = 2079 J/kg oK)
A
ρ = 0.4965 kg/m3
B
ρ = 0.5965 kg/m3
C
ρ = 0.6495 kg/m3
D
ρ = 0.9456 kg/m3
Answer: ρ = 0.4965 kg/m3
#73.
At 32 oC and 205 kPa gage, the specific weight of a certain gas was 13.7 N/m3. Determine the gas constant of this gas.
A
718.87 J/kg - oR
B
139.7 J/kg - oR
C
306.325 J/kg - oR
D
821.78 J/kg - oR
Answer: 718.87 J/kg - oR
#74.
Air is kept at a pressure of 200 kPa absolute and a temperature of 30 oC in a 500-liter container. What is the mass of air?
A
2.05 kg
B
3.15 kg
C
1.15 kg
D
4.05 kg
Answer: 1.15 kg
#75.
A cylindrical tank 80 cm in diameter and 90 cm high is filled with a liquid. The tank and the liquid weighted 420 kg. The weight of the empty tank is 40 kg. What is the unit weight of the liquid in kN/m3?
A
8.24 kN/m3
B
8.14 kN/m3
C
8.54 kN/m3
D
8.34 kN/m3
Answer: 8.24 kN/m3
#76.
A lead cube has a total mass of 80 kg. What is the length of its side? if the specific gravity of the lead is 11.3.
A
19.2 cm
B
20.2 cm
C
18.2 cm
D
21.2 cm
Answer: 19.2 cm
#77.
A liquid compressed in a container has a volume of 1 liter at a pressure of 1 MPa and a volume of 0.995 liter at a pressure of 2 MPa. The bulk modulus of elasticity (EB) of the liquid is:
A
100 MPa
B
200 MPa
C
150 MPa
D
95 MPa
Answer: 200 MPa
#78.
What pressure is required to reduce the volume of water by 0.6 percent? EB = 2.2 GPa.
A
0.0132 MPa
B
13.2 MPa
C
36.6 MPa
D
0.0366 MPa
Answer: 13.2 MPa
#79.
Water in a hydraulic press, initially at 137 kPa abs, is subjected to a pressure of 116, 280 kPa abs. Using EB = 2.5 GPa, determine the percentage decrease in the volume of water.