Engineering Questions with Answers - Multiple Choice Questions

# Aerodynamics – Laminar Flow – 1

1 - Question

Is laminar flow occurs when fluid flows in parallel layers?
a) True
b) False
Explanation: In fluid dynamics, laminar flow occurs when fluid flows I parallel layers, with no disruption between the layers. At low velocities, the fluid tends to flow without lateral mixing, and adjacent layers slide past one another like playing cards.

2 - Question

Is motion of the particles of the fluid is very orderly in laminar flow?
a) False
b) True
Explanation: In laminar flow, the motion of the particles of the fluid is very orderly with particles close to a solid surface moving in straight lines parallel to that surface. Laminar flow is a flow regime characterized by high momentum diffusion and low momentum convection.

3 - Question

Is turbulent flow is a less orderly flow?
a) False
b) True
Explanation: Turbulent flow is a less orderly flow regime that is characterized by eddies, small packets of fluid particles, which results in lateral mixing. In non-scientific terms, laminar flow is smooth, when turbulent flow is rough.

4 - Question

Is laminar flow occurs at lower velocities?
a) True
b) False
Explanation: When a fluid is flowing through a closed channel such as a pipe or between two flat plates, either of two types of flow may occur depending on the velocity and viscosity of the fluid, laminar flow tends to occur at lower velocities, below a threshold at which it becomes turbulent.

5 - Question

Is dimensionless Reynolds number is an important parameter?
a) False
b) True
Explanation: The flow occurring in a fluid in a channel is important in fluid- dynamics problems and subsequently affects heat and mass transfer in a fluid system. The dimensionless Reynolds number is an important parameter in the equations that describe whether fully developed flow conditions lead to laminar.

6 - Question

Is Reynolds number is ratio of inertial force to viscous force?
a) True
b) False
Explanation: The Reynolds number is the ratio of inertial force to the viscous force of the fluid, how fast the fluid is moving relative to how viscous it is, irrespective of the scale of the fluid system. Laminar flow generally occurs when fluid is moving slowly or the fluid is very viscous.

7 - Question

Is flow will transition from laminar to turbulent at a specific range of Reynolds number?
a) False
b) True
Explanation: As the Reynolds number increases, such as by increasing the flow rate of the fluid, the flow will transition from laminar to turbulent flow at a specific range of Reynolds number, the laminar-turbulent transition range depending on small disturbance levels in the fluid.

8 - Question

Is stokes exhibit at Reynolds number much less than 1?
a) True
b) False
Explanation: The Reynolds number is very small, much less than 1, then the fluid will exhibit stokes, where the viscous forces of the fluid dominate the inertial forces. The specific calculation of the Reynolds number, and the values where laminar flow occurs.

9 - Question

Is Reynolds number occurs below the critical value?
a) True
b) False