The ratio of hydrodynamic boundary layer to thermal boundary layer thickness in case of liquid metals is__________________?

Byadmin March 10, 2019August 27, 2021

The ratio of hydrodynamic boundary layer to thermal boundary layer thickness in case of liquid metals is__________________?

A. < 1
B. 1
C. > 1
D. 2

Fluid Mechanics for Chemical

A centrifugal pump has the following specifications: Power = 4 H.P.; Speed = 800 rpm Head = 8 metres Flow = 1000 litres/minutes. If its speed is halved, then the new head will be ______________ metres?

A centrifugal pump has the following specifications: Power = 4 H.P.; Speed = 800 rpm Head = 8 metres Flow = 1000 litres/minutes. If its speed is halved, then the new head will be ______________ metres?

A. 2
B. 4
C. 8
D. 5.5

Read More A centrifugal pump has the following specifications: Power = 4 H.P.; Speed = 800 rpm Head = 8 metres Flow = 1000 litres/minutes. If its speed is halved, then the new head will be ______________ metres?
Fluid Mechanics for Chemical

A 2″ gate valve fitted in a pipe is replaced by a similar globe valve. Pressure drop in gate valve was Δp. For the same discharge, the pressure drop across globe valve is__________________?

A 2″ gate valve fitted in a pipe is replaced by a similar globe valve. Pressure drop in gate valve was Δp. For the same discharge, the pressure drop across globe valve is__________________?

A. Δp
B. < Δp
C. > Δp
D. Δp2

Read More A 2″ gate valve fitted in a pipe is replaced by a similar globe valve. Pressure drop in gate valve was Δp. For the same discharge, the pressure drop across globe valve is__________________?
Fluid Mechanics for Chemical

The velocity profile exhibited by laminar flow of Newtonian fluids is such that the velocity distribution w.r.t. radius of the circular pipe is a/an ______________ with the apex at the centre line of the pipe?

The velocity profile exhibited by laminar flow of Newtonian fluids is such that the velocity distribution w.r.t. radius of the circular pipe is a/an ______________ with the apex at the centre line of the pipe?

A. Hyperbola
B. Parabola
C. Semi-circle
D. Semi-ellipse

Read More The velocity profile exhibited by laminar flow of Newtonian fluids is such that the velocity distribution w.r.t. radius of the circular pipe is a/an ______________ with the apex at the centre line of the pipe?
Fluid Mechanics for Chemical

Potential flow is characterised by the___________________?

Potential flow is characterised by the___________________?

A. Irrotational and frictionless flow
B. Irrotational and frictional flow
C. One in which dissipation of mechanical energy into heat occurs
D. Formation of eddies within the stream

Read More Potential flow is characterised by the___________________?
Fluid Mechanics for Chemical

Momentum correction factor used in fluid flow problems accounts for the__________________?

Momentum correction factor used in fluid flow problems accounts for the__________________?

A. Change in direction of flow
B. Change in total energy
C. Change in pressure
D. Non uniform direction of velocities at inlet & outlet sections

Read More Momentum correction factor used in fluid flow problems accounts for the__________________?
Fluid Mechanics for Chemical

Which of the following has the maximum compression ratio ?

Which of the following has the maximum compression ratio ?

A. Blower
B. Compressor
C. Vacuum pump
D. Fan

Read More Which of the following has the maximum compression ratio ?

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