FLUID MECHANICS PROBLEM
SOLUTIONS AND CALCULATIONS EXAM
LATEST UPDATE 2025/2026 QUESTIONS
AND DETAILED ANSWERS | 100%
CORRECT ANSWERS
What is the total length of the discharge pipeline in the water system
problem? - CORRECT ANSWER-The total length is 5500 m of 300
mm pipe plus 3660 m of 450 mm pipe.
What is the difference in elevation between the water surface in the
reservoir and the center of the 300 mm pipe? - CORRECT ANSWER-
The difference in elevation is 45.7 m.
What is the coefficient of friction used for both pipes in the water
system problem? - CORRECT ANSWER-The coefficient of friction is
0.02.
,How is the velocity of water in the bigger pipeline calculated? -
CORRECT ANSWER-Using the formula hf1 = 0.0826 f L Q2 / D^5,
where hf1 is the head loss in the 450 mm pipe.
What is the velocity of water in the bigger pipeline? - CORRECT
ANSWER-The velocity is 1.5 m/s.
What is the rate of flow in the pipes? - CORRECT ANSWER-The rate
of flow is Q1 = Q2 = 0.106 m³/sec.
What is the draft of the barge when unloaded at the Pasig River? -
CORRECT ANSWER-The draft is 2.41 m.
What is the specific gravity of the water at the Pasig River? -
CORRECT ANSWER-The specific gravity is 1.01.
What is the draft of the barge when loaded with reinforcing bars in
Metro Manila Bay? - CORRECT ANSWER-The draft is 4.97 m.
How much does it cost to transfer one steel bar? - CORRECT
ANSWER-It costs five pesos to transfer one bar.
, What is the weight of the barge when unloaded? - CORRECT
ANSWER-The weight is 43,813,800 kg.
What is the weight of the reinforcing bars loaded on the barge? -
CORRECT ANSWER-The weight of the bars is 48,330,000 kg.
How many steel bars are loaded on the barge? - CORRECT ANSWER-
There are 3,266,225 bars.
What is the total cost for transferring the steel bars in thousands of
pesos? - CORRECT ANSWER-The total cost is 16,331 thousand pesos.
What is the radius of the circular gate submerged in water? -
CORRECT ANSWER-The radius is 100 mm.
What is the total force acting on one side of the circular gate? -
CORRECT ANSWER-The total force is 30.82 N.
What is the location of the force from the center of gravity of the
plate? - CORRECT ANSWER-The location is 25 mm from the center
of gravity.
SOLUTIONS AND CALCULATIONS EXAM
LATEST UPDATE 2025/2026 QUESTIONS
AND DETAILED ANSWERS | 100%
CORRECT ANSWERS
What is the total length of the discharge pipeline in the water system
problem? - CORRECT ANSWER-The total length is 5500 m of 300
mm pipe plus 3660 m of 450 mm pipe.
What is the difference in elevation between the water surface in the
reservoir and the center of the 300 mm pipe? - CORRECT ANSWER-
The difference in elevation is 45.7 m.
What is the coefficient of friction used for both pipes in the water
system problem? - CORRECT ANSWER-The coefficient of friction is
0.02.
,How is the velocity of water in the bigger pipeline calculated? -
CORRECT ANSWER-Using the formula hf1 = 0.0826 f L Q2 / D^5,
where hf1 is the head loss in the 450 mm pipe.
What is the velocity of water in the bigger pipeline? - CORRECT
ANSWER-The velocity is 1.5 m/s.
What is the rate of flow in the pipes? - CORRECT ANSWER-The rate
of flow is Q1 = Q2 = 0.106 m³/sec.
What is the draft of the barge when unloaded at the Pasig River? -
CORRECT ANSWER-The draft is 2.41 m.
What is the specific gravity of the water at the Pasig River? -
CORRECT ANSWER-The specific gravity is 1.01.
What is the draft of the barge when loaded with reinforcing bars in
Metro Manila Bay? - CORRECT ANSWER-The draft is 4.97 m.
How much does it cost to transfer one steel bar? - CORRECT
ANSWER-It costs five pesos to transfer one bar.
, What is the weight of the barge when unloaded? - CORRECT
ANSWER-The weight is 43,813,800 kg.
What is the weight of the reinforcing bars loaded on the barge? -
CORRECT ANSWER-The weight of the bars is 48,330,000 kg.
How many steel bars are loaded on the barge? - CORRECT ANSWER-
There are 3,266,225 bars.
What is the total cost for transferring the steel bars in thousands of
pesos? - CORRECT ANSWER-The total cost is 16,331 thousand pesos.
What is the radius of the circular gate submerged in water? -
CORRECT ANSWER-The radius is 100 mm.
What is the total force acting on one side of the circular gate? -
CORRECT ANSWER-The total force is 30.82 N.
What is the location of the force from the center of gravity of the
plate? - CORRECT ANSWER-The location is 25 mm from the center
of gravity.
