Fluid Mechanics MCQ Questions & Answers | Chemical Engineering

A. Static submergence

B. Net positive suction head (NPSH)

C. Cavitation sensitivity

D. Priming

A. Generally a needle valve

B. Used to release any gases that might be vapour locking the pump

C. Helpful in easy removal of samples

D. All of the above

A. 0.01 to 0.1

B. 0.1 to 2

C. 2 to 10

D. 10 to 100

A. 600

B. 660

C. 1.1

D. 60

A. Mean flow velocity is about 0.5 times the maximum velocity

B. Velocity profile becomes flatter and flatter with increasing Reynolds number

C. Point of maximum instability exists at a distance of $$\frac{{2{\text{r}}}}{3}$$ from the pipe wall (r = pipe radius)

D. Skin friction drag, shear stresses, random orientation of fluid particles and slope of velocity profile at the wall are more

A. Shear stress over the cross-section is proportional to the distance from the surface of the pipe

B. Surface of velocity distribution is a paraboloid of revolution, whose volume equals half the volume of circumscribing cylinder

C. Velocity profile varies hyperbolically and the shear stress remains constant over the cross-section

D. Average flow occurs at a radial distance of 0.5 r from the centre of the pipe (r = pipe radius)

A. Require less space

B. Have quieter operation

C. Have lower operating costs

D. All of the above

A. Less than the average velocity through channels

B. More than the average velocity through channels

C. Dependent on the pressure drop across the bed

D. Same as the average velocity through channels

A. Increase

B. Decrease

C. Remain same

D. Be quadrupled

A. m

B. n

C. n - m

D. $$\frac{{\text{n}}}{{\text{m}}}$$