CE 3142 Applied Fluid Mechanics Lab - Mid-Term Quiz (new update fall 2025-2026)
University of Texas, Arlington
Date: July 2, 2025 Time: 1:00 PM to 2:00 PM Venue: NH 109
Total Marks: 20
Instructions:
• This paper has two parts: Part A (MCQs) and Part B (Numericals).
• Answer all questions in Part A.
• In Part B, attempt any five questions.
• Use: ρ = 1000 kg/m3, g = 9.81 m/s2
• Calculators allowed. No electronic gadgets permitted.
Part A – Conceptual MCQs (20 × 0.5 = 10 marks)
Tick the correct option for each of the following questions:
1. Which point is the location where the resultant hydrostatic force is assumed to act on
a submerged surface?
a) Centroid
b) Center of pressure
c) Center of buoyancy
d) Metacenter
2. As the depth of immersion increases for a vertical surface, the hydrostatic force:
a) Decreases
b) Remains constant
c) Increases linearly
d) Increases exponentially
1
,3. The hydrostatic force on a submerged surface always acts:
a) Horizontally
b) Vertically downward
c) Perpendicular to the surface
d) Tangential to the surface
4. In the hydrostatic pressure experiment, the experimental depth of center of pressure
is affected by:
a) Fluid density
b) Shape of the surface
c) Lever arm and balance mass
d) All of the above
5. Bernoulli’s equation is based on which principle?
a) Conservation of mass
b) Conservation of energy
c) Conservation of force
d) Newton’s second law
6. In a converging duct, the pressure head will typically:
a) Increase
b) Decrease
c) Remain constant
d) Fluctuate randomly
7. In a pipe of varying cross-section under steady flow, which point will have the highest
velocity?
a) The widest section
b) The point at highest elevation
c) The narrowest section
d) The inlet
2
, 8. Which of the following is neglected in Bernoulli’s equation in ideal conditions?
a) Pressure head
b) Elevation head
c) Velocity head
d) Viscous loss
9. In a real fluid flow system, the total head decreases along the direction of flow because
of:
a) Pumping
b) Viscosity and energy losses
c) Added potential energy
d) Increased pipe diameter
10. Minor losses in pipe flow typically occur due to:
a) Pipe length
b) Friction along the walls
c) Fittings, bends, and valves
d) Flow rate
11. Among standard fittings, the highest head loss usually occurs at:
a) Elbow
b) Gate valve
c) Sudden expansion
d) Straight pipe
12. The loss coefficient (K) depends primarily on:
a) Fluid temperature
b) Type of fitting and flow regime
c) Pipe color
d) Elevation of the pipe
13. In the fittings experiment, if the flow rate increases, the energy loss:
a) Decreases
b) Remains constant
c) Increases
d) Vanishes
3
University of Texas, Arlington
Date: July 2, 2025 Time: 1:00 PM to 2:00 PM Venue: NH 109
Total Marks: 20
Instructions:
• This paper has two parts: Part A (MCQs) and Part B (Numericals).
• Answer all questions in Part A.
• In Part B, attempt any five questions.
• Use: ρ = 1000 kg/m3, g = 9.81 m/s2
• Calculators allowed. No electronic gadgets permitted.
Part A – Conceptual MCQs (20 × 0.5 = 10 marks)
Tick the correct option for each of the following questions:
1. Which point is the location where the resultant hydrostatic force is assumed to act on
a submerged surface?
a) Centroid
b) Center of pressure
c) Center of buoyancy
d) Metacenter
2. As the depth of immersion increases for a vertical surface, the hydrostatic force:
a) Decreases
b) Remains constant
c) Increases linearly
d) Increases exponentially
1
,3. The hydrostatic force on a submerged surface always acts:
a) Horizontally
b) Vertically downward
c) Perpendicular to the surface
d) Tangential to the surface
4. In the hydrostatic pressure experiment, the experimental depth of center of pressure
is affected by:
a) Fluid density
b) Shape of the surface
c) Lever arm and balance mass
d) All of the above
5. Bernoulli’s equation is based on which principle?
a) Conservation of mass
b) Conservation of energy
c) Conservation of force
d) Newton’s second law
6. In a converging duct, the pressure head will typically:
a) Increase
b) Decrease
c) Remain constant
d) Fluctuate randomly
7. In a pipe of varying cross-section under steady flow, which point will have the highest
velocity?
a) The widest section
b) The point at highest elevation
c) The narrowest section
d) The inlet
2
, 8. Which of the following is neglected in Bernoulli’s equation in ideal conditions?
a) Pressure head
b) Elevation head
c) Velocity head
d) Viscous loss
9. In a real fluid flow system, the total head decreases along the direction of flow because
of:
a) Pumping
b) Viscosity and energy losses
c) Added potential energy
d) Increased pipe diameter
10. Minor losses in pipe flow typically occur due to:
a) Pipe length
b) Friction along the walls
c) Fittings, bends, and valves
d) Flow rate
11. Among standard fittings, the highest head loss usually occurs at:
a) Elbow
b) Gate valve
c) Sudden expansion
d) Straight pipe
12. The loss coefficient (K) depends primarily on:
a) Fluid temperature
b) Type of fitting and flow regime
c) Pipe color
d) Elevation of the pipe
13. In the fittings experiment, if the flow rate increases, the energy loss:
a) Decreases
b) Remains constant
c) Increases
d) Vanishes
3
