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Fluid Mechanics for Chemical

When the water is warm, the height to which it can be lifted by a pump_________________?

Fluid Mechanics for Chemical /
When the water is warm, the height to which it can be lifted by a pump_________________?

A. Decreases due to reduced viscosity
B. Decreases due to reduced vapour pressure
C. Increases due to increased vapour pressure
D. Decreases due to increased frictional resistance

When the water is warm, the height to which it can be lifted by a pump_________________? Read More »

Fluid Mechanics for Chemical

In centrifugal pumps, cavitation occurs, when pressure of the impeller eye or vane becomes_______________?

Fluid Mechanics for Chemical /
In centrifugal pumps, cavitation occurs, when pressure of the impeller eye or vane becomes_______________?

A. Less than atmospheric pressure
B. More than liquid vapor pressure
C. Less than liquid vapor pressure
D. More than atmospheric pressure

In centrifugal pumps, cavitation occurs, when pressure of the impeller eye or vane becomes_______________? Read More »

Fluid Mechanics for Chemical

In case of unsteady fluid flow, conditions & flow pattern change with the passage of time at a position in a flow situation. Which of the following is an example of unsteady flow ?

Fluid Mechanics for Chemical /
In case of unsteady fluid flow, conditions & flow pattern change with the passage of time at a position in a flow situation. Which of the following is an example of unsteady flow ?

A. Discharge of water by a centrifugal pump being run at a constant rpm
B. Water flow in the suction and discharge pipe of a reciprocating pump
C. Water discharge from a vertical vessel in which constant level is maintained
D. Low velocity flow of a highly viscous liquid through a hydraulically smooth pipe

In case of unsteady fluid flow, conditions & flow pattern change with the passage of time at a position in a flow situation. Which of the following is an example of unsteady flow ? Read More »

Fluid Mechanics for Chemical

For turbulent flow of an incompressible fluid through a pipe, the flow rate „Q‟ is proportional to (Δ P)n, where ΔP is the pressure drop. The value of exponent ‘n’ is_________________?

Fluid Mechanics for Chemical /
For turbulent flow of an incompressible fluid through a pipe, the flow rate „Q‟ is proportional to (Δ P)n, where ΔP is the pressure drop. The value of exponent ‘n’ is_________________?

A. 1
B. 0
C. < 1
D. > 1

For turbulent flow of an incompressible fluid through a pipe, the flow rate „Q‟ is proportional to (Δ P)n, where ΔP is the pressure drop. The value of exponent ‘n’ is_________________? Read More »

Fluid Mechanics for Chemical

In the complete turbulence zone (in rough pipes), the____________________?

Fluid Mechanics for Chemical /
In the complete turbulence zone (in rough pipes), the____________________?

A. Rough and smooth pipes have the same friction factor
B. Laminar film covers the roughness projections
C. Friction factor depends upon NRe only
D. Friction factor is independent of the relative roughness

In the complete turbulence zone (in rough pipes), the____________________? Read More »

Fluid Mechanics for Chemical

Reynolds number for flow of water at room temperature through 2 cm dia pipe at an average velocity of 5 cm/sec is around________________?

Fluid Mechanics for Chemical /
Reynolds number for flow of water at room temperature through 2 cm dia pipe at an average velocity of 5 cm/sec is around________________?

A. 2000
B. 10
C. 100
D. 1000

Reynolds number for flow of water at room temperature through 2 cm dia pipe at an average velocity of 5 cm/sec is around________________? Read More »

Fluid Mechanics for Chemical