Quality Assessment FM Quiz No 1

Which factor primarily influences the formation of a boundary layer in pipe flow?

• Pipe length

• Pipe material

• Fluid viscosity

• Pipe diameter

The flow in a pipe becomes fully developed when:

• The velocity profile is uniform across the pipe diameter

• The velocity profile no longer changes along the pipe's length

• The flow reaches the pipe's centerline

• The fluid reaches a certain temperature

Which term describes the point in a pipe where the boundary layer merges, and flow becomes fully developed?

• Hydraulic diameter

• Critical point

• Laminar transition point

• Entrance length

A venturiflume is used to measure

• pressure of liquid

• discharge of liquid

• pressure difference between two points in a channel

• pressure difference between two points in a pipe

According to Archimede's principle, if a body is immersed partially or fully in a fluid then the buoyancy force is _______ the weight of fluid displaced by the body.

• equal to

• less than

• more than

• unpredictable

If a body floating in a liquid returns back to its original position, when given a small angular displacement, the body is said to be in

• neutral equilibrium

• stable equilibrium

• unstable equilibrium

• none of these

As the temperature increases the viscosity of gas.

• decreases

• increases

• increases and decreases

• remains same

Which of the following best describes the change in boundary layer thickness along a flat plate?

• It remains constant

• It decreases along the plate

• It increases along the plate

• It fluctuates randomly

The critical Reynolds number for transition from laminar to turbulent boundary layer in flow over a flat plate is approximately:

• 2300

• 500,000

• 10,000

• 2000

The major loss in pipe flow is primarily due to:

• Bends and fittings in the pipe

• The change in pipe diameter

• Friction along the length of the pipe

• Sudden expansion or contraction in the pipe