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NOVEMBER 2024 CE BOARD EXAM REFRESHER HGE 4

1. Gate AB in the given figure is a quarter Situation 1. A vertical tank, 6 m in

circle 3 m wide into the paper. Find the diameter and 6 m high, has an orifice at
force F (kN) to prevent rotation about the bottom for its outlet. The diameter
hinge B. Neglect the weight of the gate. of the orifice is 100 mm Ø and has a
A. 42.4 C. 14.1 coefficient of discharge of 0.60. The
B. 36.4 D. 28.1 tank is full of water at the start.

F 7. Find the time, in minutes, to drain 100

m3 of water.
A. 25.7 C. 110.6
B. 20.3 D. 39.7
A
water 8. Find the time, in minutes, to lower the
water to a depth of 4 m.
r=2.4 A. 25.7 C. 110.6
B. 20.3 D. 39.7
B
9. Find the time, in minutes, to empty the
2. A 100 – mm diameter solid cylinder of tank.
height 95 mm weighing 3.78 N is immersed A. 25.7 C. 110.6
in liquid (γ=8168 N/m3) contained in a B. 20.3 D. 39.7
tall, upright metal cylinder having a
diameter of 120 mm. Before immersion the Situation 2. A sector gate shown consists
liquid was 75 mm deep. What is the of cylindrical surface, of which AB is
increase in the depth of water in the the trace. The length of gate,
container, in mm? perpendicular to the paper is 10 m.
A. 59 C. 68
B. 41 D. 35

3. A prism of dimensions 1.5 m x 1.0 m x

2.0 m weighs 29.4 kN in water, determine
its specific gravity.
A. 1.0 C. 2.0
B. 1.5 D. 2.5

4. A piece of wood having a specific

gravity of 0.65 is 70 mm square and 1.5
m long. How many kg of lead fastened at
one end of the wood so that it will float
upright with 0.30 m projecting out when 10. Determine the horizontal force acting
floating in water? Specific gravity of on the gate.
lead = 11.2 A. 3679 C. 1855
A. 1.11 C. 1.31 B. 1235 D. 1256
B. 1.21 D. 1.41 11. Determine the vertical force acting on
the gate.
5. A cubic tank is filled with 1.5 m of A. 3679 C. 1855
oil, sp gr 0.752. Find the force acting B. 1235 D. 1256
on the side of the tank, in kN, when the 12. Determine the location of the vertical
acceleration is 4.9 m/s2 vertically force from O.
upward. A. 8.57 C. 5.66
A. 12.4 C. 18.7 B. 2.877 D. 2.34
B. 9.30 D. 6.22
Situation 3. An object weighs 75 N when
6. A vertical rectangular gate 1.5 m wide submerged in oil (sg=0.80) and a force
and 3 m high is hinged at the bottom of 100 N is required to hold it
with the shorter edge horizontal. On one submerged in mercury.
side of the gate, water stands level
with its top of the gate, on the other 13. What is the weight (N) of the object?
side, water stands 2 m. below the top. A. 85.9 C. 95.1
Evaluate the force applied horizontally B. 72.1 D. 64.8
at the top of the gate to open it. 14. What is the volume (m3) of the object?
A. 31.2 C. 21.3 A. 0.00125 C. 0.00096
B. 32.1 D. 23.1 B. 0.00139 D. 0.00214
15. What is the specific gravity?
A. 5.21 C. 6.62
B. 6.29 D. 7.16

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reproduction, use, or dissemination is strictly prohibited and shall be prosecuted to the full extent of the law.
NOVEMBER 2024 CE BOARD EXAM REFRESHER HGE 4

16. The continuity equation is based on the 24. In flow, the liquid particles may
principle of: possess
A. conservation of mass A. potential energy
B. conservation of momentum B. kinetic energy
C. conservation of energy C. pressure energy
D. conservation of force D. all the above

17. When a valve is suddenly closed on a 25. For most economical rectangular section
liquid flowing through a long pipe, the of a channel, the depth is kept
pressure wave of high intensity thus A. one-fourth of the width
generated is known as: B. three times the hydraulic radius
A. water hammer C. half the width
B. pressure wave D. none of these
C. flow hammer
D. jet hammer ~o0o~
Nothing Follows
18. Which property of the fluid accounts for
the major losses in pipes?
A. density
B. specific gravity
C. viscosity
D. compressiblity

19. An open vessel of water is accelerated

up an inclined plane. The free water
surface will
A. be horizontal
B. make an angle in direction of
inclination of inclined plane
C. make an angle in opposite
direction to inclination of
inclined plane
D. any one of above is possible

20. The horizontal to vertical side slope

in case of Cipolletti weir?
A. 1:1
B. 1:4
C. 1:2
D. 4:1

21. The horizontal component of the force

on a curved surface is equal to
A. weight of liquid vertically below
the curved surface
B. force on a vertical projection of
the curved surface
C. product of pressure at its
centroid and the area
D. weight of liquid retained by the
curved area

22. For the most economical trapezoidal

open channel,
A. half of the top width must be
equal to one of the sloping sides
B. the hydraulic radius must be equal
to half the depth of flow
C. the semicircle drawn with top
width as diameter must touch the
three sides of the channel
D. All of these

23. Gauge pressure is

A. absolute pressure - atmospheric
pressure
B. absolute pressure + atmospheric
pressure
C. atmospheric pressure - absolute
pressure “Believe you can and you’re halfway there.”
D. none of these
This review material is exclusively for the personal use, viewing and downloading of Review Innovations’ reviewees. Unauthorized
reproduction, use, or dissemination is strictly prohibited and shall be prosecuted to the full extent of the law.