FLUID MECHANICS
FINAL - M/C
(Latest Syllabus 2025-2026) Real
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✓ This Exam contains: Fluid Mechanics Final - M/C
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, Question 1
What is friction velocity
Correct Answer
measure of how the fluid can "stick" to a surface and how turbulent flow behaves near that surface
Question 2
Momentum thickness vs displacement thickness
Correct Answer
Momentum thickness (theta)
- measures how much the flow's momentum is reduced near the surface
Displacement thickness
- measures how much the flow is pushed away from the surface due to the slower-moving fluid near the wall
Question 3
what is the velocity at the end of the boundary layer?
Correct Answer
0.999999 x u^infinite
Question 4
major loss vs minor loss (minor head vs major head)
Correct Answer
major
- loss of energy due to (viscous effects) aka friction in a STRAIGHT pipe
- we dont use kL in the equation bc it accounts for the straight part of the pipe... kL depends on the
geometry.
minor
- loss of energy from fittings, bends, and other pipe elements that disrupt the flow.
-kL is in the equation for hL.
Question 5
At what Mach number is air considered incompressible
Correct Answer
less thana 0.3
Question 6
Explain the no slip condition
Correct Answer
at a solid boundary the fluid velocity is 0
Trusted by thousands of students and professionals worldwide Page 2 of 6
FINAL - M/C
(Latest Syllabus 2025-2026) Real
Exam Questions | Verified Model
Answers | Question Bank
100% Guarantee Pass
✓ This Exam contains: Fluid Mechanics Final - M/C
✓ 100% Accurate Questions and Answers
✓ 100% Guarantee Pass - Verified by Experts
✓ Each Question Includes The Correct Answer
✓ Expert-Verified
Trusted by thousands of students and professionals worldwide Page 1 of 6
, Question 1
What is friction velocity
Correct Answer
measure of how the fluid can "stick" to a surface and how turbulent flow behaves near that surface
Question 2
Momentum thickness vs displacement thickness
Correct Answer
Momentum thickness (theta)
- measures how much the flow's momentum is reduced near the surface
Displacement thickness
- measures how much the flow is pushed away from the surface due to the slower-moving fluid near the wall
Question 3
what is the velocity at the end of the boundary layer?
Correct Answer
0.999999 x u^infinite
Question 4
major loss vs minor loss (minor head vs major head)
Correct Answer
major
- loss of energy due to (viscous effects) aka friction in a STRAIGHT pipe
- we dont use kL in the equation bc it accounts for the straight part of the pipe... kL depends on the
geometry.
minor
- loss of energy from fittings, bends, and other pipe elements that disrupt the flow.
-kL is in the equation for hL.
Question 5
At what Mach number is air considered incompressible
Correct Answer
less thana 0.3
Question 6
Explain the no slip condition
Correct Answer
at a solid boundary the fluid velocity is 0
Trusted by thousands of students and professionals worldwide Page 2 of 6
