#121.
A tank contains oil (s = 0.80), gasoline (s = 0.90) and seawater (s = 1.03). If the depths
of the liquids are 0.5 m, 0.8 m, and 1 for oil, gasoline, and seawater respectively. Determine the pressure at a depth of 1.2 m.
A
18.33 kPa
B
19.62 kPa
C
15.74 kPa
D
10.10 kPa
Answer: 10.10 kPa
#122.
A tank contains oil (s = 0.80), gasoline (s = 0.90) and seawater (s = 1.03). If the depths
of the liquids are 0.5 m, 0.8 m, and 1 for oil, gasoline, and seawater respectively. Determine the pressure throughout the bottom.
A
20.77 kPa
B
22.19 kPa
C
21.09 kPa
D
29.12 kPa
Answer: 21.09 kPa
#123.
A tank contains oil (s = 0.80), gasoline (s = 0.90) and seawater (s = 1.03). If the depths
of the liquids are 0.5 m, 0.8 m, and 1 for oil, gasoline, and seawater respectively. Determine the pressure at the depth of 1.8 m.
A
19.12 kPa
B
18.07 kPa
C
16.04 kPa
D
17.55 kPa
Answer: 16.04 kPa
#124.
If the specific weight of a liquid is \(8.1 kN/m^3\). What is the specific gravity of the liquid?
A
0.92
B
0.60
C
0.83
D
0.75
Answer: 0.83
#125.
If the specific weight of a liquid is \(8.1 kN/m^3\). What is the density of the liquid?
A
830 kg/m^3
B
780 kg/m^3
C
920 kg/m^3
D
870 kg/m^3
Answer: 870 kg/m^3
#126.
If the specific weight of a liquid is \(8.1 kN/m^3\). What substance is most likely for that liquid?
A
Oil
B
Molasses
C
Sea water
D
Mercury
Answer: Oil
#127.
A space 16 mm wide between two large plane surfaces is filled with SAE 30 Western lubricating oil at \(35^o C\). Assume \( \mu = 0.18 ~N/m^2\). What force is required to drag a very thin plate 0.4 sq m area between the surfaces \(v = 0.25 m/s\) if this
plate is equally spaced between the two surfaces?
A
2.25 N
B
5.50 N
C
4.87 N
D
4.50 N
Answer: 4.50 N
#128.
A space 16 mm wide between two large plane surfaces is filled with SAE 30 Western lubricating oil at \(35^o C\). Assume \( \mu = 0.18 ~N/m^2\). What force is required to drag a very thin plate 0.4 sq m area between the surfaces \(v = 0.25 m/s\) if this
plate thickness is 5 mm?
A
4.79 N
B
4.50 N
C
5.24 N
D
4.87 N
Answer: 5.24 N
#129.
An open tank 3 m by 3 m in the horizontal section weighs 3.6 kN and contains water to a depth
of 1 m. It is acted by an unbalanced force of 16 kN parallel to a pair of sides. Determine the acceleration of the tank.
A
1.59 m/s^2
B
1.71 m/s^2
C
3.54 m/s^2
D
1.95 m/s^2
Answer: 1.71 m/s^2
#130.
An open tank 3 m by 3 m in the horizontal section weighs 3.6 kN and contains water to a depth
of 1 m. It is acted by an unbalanced force of 16 kN parallel to a pair of sides. Determine the height of the tank so that no water will spill out.
A
1.26 m
B
1.82 m
C
2.03 m
D
2.50 m
Answer: 1.26 m
#131.
An open tank 3 m by 3 m in the horizontal section weighs 3.6 kN and contains water to a depth
of 1 m. It is acted by an unbalanced force of 16 kN parallel to a pair of sides. If the acceleration is increased by 4 m/s^2, how much water will be spilled out?
A
2.44 m^3
B
6.12 m^3
C
4.92 m^3
D
3.30 m^3
Answer: 4.92 m^3
#132.
A device used to measure pressure heads in pipes where the liquid is in motion.
A
Piezometer
B
Manometer
C
Barometer
D
U tube
Answer: Piezometer
#133.
It refers to the pressures that are above or below the atmosphere and can be measured by pressure gages
or manometers.
A
Atmospheric pressure
B
Absolute pressure
C
Relative pressure
D
Barometric pressure
Answer: Relative pressure
#134.
A gage pressure at elevation 6 m at the side of a tank containing a liquid reads 80 kPa. Another gage at
elevation 4 m reads 100 kPa. What is the specific gravity of the liquid?
A
1.02
B
1.04
C
1.21
D
1.14
Answer: 1.02
#135.
Piston A has a cross-section of 1200 sq cm while that of piston B is 950 sq cm with the latter higher
than piston A by 1.75 m. If the intervening passages are filled with oil whose specific gravity is 0.8,
what is the difference in pressure between A and B?
A
13.73 kPa
B
18.44 kPa
C
16.23 kPa
D
19.55 kPa
Answer: 13.73 kPa
#136.
A block of wood requires a force of 40 N to keep it immersed in water and a force of 100 N to keep it
immersed in glycerin (s = 1.3). Find the weight of the wood.
A
135 N
B
185 N
C
120 N
D
160 N
Answer: 160 N
#137.
A cylindrical container 8 m long high and 3 m in diameter is reinforced with two hoops 1 m
from each end. Determine the hydrostatic force.
A
855.79 kN
B
820.06 kN
C
960.18 kN
D
941.76 kN
Answer: 941.76 kN
#138.
A cylindrical container 8 m long high and 3 m in diameter is reinforced with two hoops 1 m
from each end. Determine the tension at the upper end.
A
135.3 kN
B
130.8 kN
C
141.6 kN
D
164.9 kN
Answer: 130.8 kN
#139.
A cylindrical container 8 m long high and 3 m in diameter is reinforced with two hoops 1 m
from each end. Determine the tension at the lower end.