FLUID MECHANICS MCQs 14 | ESE | GATE | GPSC | CIVIL ENGINEERING

ByCivilelite

Jan 1, 2023

1. Boundary layer thickness is the distance from the surface of the solid body in the direction perpendicular to flow where the velocity of fluid is equal to

[A] Free stream velocity
[B] 0.5 times the free stream velocity
[C] 0.9 times the free stream velocity
[D] 0.99 times the free stream velocity

2. To study the cruising of supersonic missiles in air by using dimensional analysis technique, which of the two dimensionless numbers will be of significance
[A] Reynolds number and Froude’s number
[B] Reynolds number and Mach number
[C] Weber number and Froude’s number
[D] Weber number and Mach number

3. The drag and lift forces experienced by object placed in a fluid stream are due to
[A] Pressure and turbulence
[B] Viscosity and turbulence
[C] Pressure and viscosity
[D] Pressure and gravity

4. Kinematic similarity between model and prototype means
[A] The similarity of forces
[B] The similarity of motion
[C] The similarity of shape
[D] The similarity of discharge

5. ___ is the square root of the ratio of the inertia force to the pressure force.
[A] Reynolds number
[B] Mach’s number
[C] Euler’s number
[D] Froude’s number