REVIEW INNOVATIONS
NOVEMBER 2024 CE BOARD EXAM REFRESHER HGE 8
INSTRUCTION: Select the correct answer for 7. Determine the pressure at the heel.
each of the following questions. Mark only A. 78.48 C. 118.94
one answer for each item by shading the box B. 109.84 D. 0
corresponding to the letter of your choice
on the answer sheet provided. STRICTLY NO 8. Determine the pressure at the toe.
ERASURES ALLOWED. GOOD LUCK. A. 78.48 C. 118.94
B. 109.84 D. 0
NOTE: A times B is represented by A×B or
A*B. A raised to the power n is 9. Determine the factor of safety against
expressed as A^n. All problems are 1 sliding
point each. A. 0.91 C. 2.45
B. 1.92 D. 3.33
Situation 1. In The cross section of a
right triangular channel that has Situation 4. An open cylindrical tank 30 cm
equal sides is shown with a coefficient in diameter and 80cm tall is filled
of roughness n = 0.012. If the rate of with water and revolved about its own
flow = 4 m3/s. vertical axis at constant angular
speed.
10. What angular speed (rpm) will cause
1.4 liters of water to spill?
A. 45.5 C. 65.2
B. 87.2 D. 56.1
11. What will be the depth of water in the
tank when it is brought to rest from
an angular speed of 240 rpm?
A. 0.55 C. 0.34
1. Compute the critical depth. B. 0.44 D. 0.23
A. 1.43 C. 2.52
B. 1.12 D. 1.27 12. What angular speed will just zero the
pressure at the bottom?
2. Compute the critical velocity. A. 255.2 C. 252.2
A. 2.23 C. 3.53 B. 222.5 D. 225.2
B. 2.50 D. 3.17
13. A woman with a glass of water having a
3. Compute the critical slope. height of 300 mm is inside the elevator
A. 0.0026 C. 0.0033 with a downward deceleration of 3 m/s2.
B. 0.0038 D. 0.0012 Determine the pressure at the bottom
of the glass.
A. 3.84 C. 3.22
Situation 2. A Water flow at the rate of B. 2.04 D. 4.42
1.2 m3/s at a depth of 1.5m in a 10-m
wide irrigation canal. Assume uniform 14. Water falls through a 100-mm-diameter
flow and use n = 0.035. orifice. The depth of water above the
orifice center is 9m. What is the
4. Calculate the nearest value of the discharge in m3/s if the tank is going
specific energy in J/N. downward with an acceleration equal to
A. 14.72 C. 1500 one-third the acceleration due to
B. 1.50 D. 0.51 gravity? Assume Cc = 0.64 and Cv = 0.98.
5. Determine the slope of the channel A. 0.0655 C. 0.0378
bed in meter per kilometer. B. 0.0534 D. 0.0756
A. 2.43x10-3 C. 6.48x10-3
B. 7.55x10-3 D. 4.53x10-3 15. A ship having a displacement of 24000
6. Determine the boundary shear stress tons and a draft of 10.5m in the ocean
at the walls in Pa. enters a harbor of fresh water. If
A. 0.0855 C. 0.0275 horizontal cross-section of the ship
B. 0.0513 D. 0.0733 at the water line is 3000 sq.m, what
depth of fresh water is required to
Situation 3. A dam is triangular in cross- float the ship? Assume a marine ton is
section with the upstream face 1000 kg and that seawater and
vertical. Water is flushed with the freshwater weighs 10.1 kN/m3 and 9.81
top. The dam is 8 m high and 8 m wide kN/m3.
at the base and weighs 2.4 tons per A. 7.77 C. 10.73
cubic meter. The coefficient of B. 11.12 D. 10.27
friction is 0.8.
16. Minimum specific energy of an open
rectangular channel with critical
depth dc.
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NOVEMBER 2024 CE BOARD EXAM REFRESHER HGE 8
A. (1/2)dc C. (2/3)dc
B. (1/3)dc D. (3/2)dc
17. Which of the following statements are
correct:
I. EGL is always parallel to the HGL
II. EGL slopes downward in the
direction flow, it will only rise with
the presence of pump
III. EGL is always above the HGL
IV. Neglecting head loss, EGL is
horizontal
A. I,II, and III only
B. II,III, and IV only
C. III and IV only
D. All of the above
