Fluid Mechanics: Flow Rates and Types

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What is the range of Reynolds number for transitional flow?

4000 < 𝑅𝑒 ≤ 6000

2000 < 𝑅𝑒 ≤ 4000 (correct)

𝑅𝑒 ≤ 2000

𝑅𝑒 > 2000

What type of flow exists if the density of each fluid particle remains relatively constant as it moves through the flow field?

Laminar flow

Turbulent flow

Incompressible flow (correct)

Compressible flow

What is the result of an increase in the speed of a fluid, according to Bernoulli's theorem?

A decrease in static pressure (correct)

No change in static pressure

An increase in viscosity

An increase in static pressure

What is the measure of the resistance of a fluid to shear or angular deformation?

Dynamic viscosity Signup and view all the answers

What is the result of the Bernoulli effect?

A decrease in fluid pressure in regions where the flow velocity is increased Signup and view all the answers

What is the type of viscosity that is measured in units of Ns/m²?

Dynamic viscosity Signup and view all the answers

What is the main cause of head loss in a hydraulic system?

Friction caused by the walls of the pipe and other technological equipment Signup and view all the answers

What is the Reynolds number a measure of?

The ratio of forces of inertia to viscous forces of fluids Signup and view all the answers

What type of flow occurs when the fluid travels smoothly or in regular paths?

Laminar flow Signup and view all the answers

What is the primary factor that affects the head loss in pipes?

All of the above Signup and view all the answers

What is the classification of head losses that are associated with frictional energy loss per length of pipe?

Major losses Signup and view all the answers

What is the property of a liquid that is due to both cohesion and adhesion?

Capillarity Signup and view all the answers

What is the primary function of a pump?

To add energy to a liquid in order to transfer it from one point to another point of higher energy level Signup and view all the answers

What type of pump imparts kinetic energy to a fluid using a high-speed revolving impeller?

Centrifugal Pump Signup and view all the answers

What is the term for the amount of power delivered by the shaft of a pump?

Brake Power Signup and view all the answers

What is the ratio of power output from the pump to the shaft power input to the pump?

Pump Efficiency Signup and view all the answers

What type of pump uses a fixed casing containing gears, cams, screws, vanes, plungers, or similar elements actuated by rotation of the drive shaft?

Rotary Pump Signup and view all the answers

What is the term for the ratio of mechanical power delivered by the motor to the electrical power supplied to the motor?

Motor Efficiency Signup and view all the answers

What is the overall efficiency of a pump a measure of?

The ratio of hydraulic power to electrical power Signup and view all the answers

What is the purpose of the specific speed in centrifugal pumps?

To predict the performance of the pump Signup and view all the answers

What do the pump affinity laws predict?

The effect of a change in rotational speed or impeller diameter on the pump's performance Signup and view all the answers

What is the main difference between an industrial fan and an industrial blower?

The pressure under which the air is moved Signup and view all the answers

What does 'same pumps' refer to in the context of the pump affinity laws?

The same pump being modified Signup and view all the answers

What is the effect of laminar flow on the head loss in a pipe system?

It is proportional to velocity rather than velocity squared. Signup and view all the answers

What is the relationship between the friction factor and velocity in laminar flow?

Inversely proportional Signup and view all the answers

What is the purpose of the Moody Chart in turbulent flow?

To determine the friction factor for turbulent flow Signup and view all the answers

What is the similarity between fan affinity laws and pump affinity laws?

Both are applied to determine the changes in performance Signup and view all the answers

What is the consequence of Poiseuille’s Law on the Darcy friction factor for laminar flows?

It makes the friction factor inversely proportional to velocity Signup and view all the answers

What is the relationship between the head loss and velocity in turbulent flow?

It is proportional to the square of the mean flow velocity Signup and view all the answers