Hydraulics And Fluid Mechanics MCQ Questions & Answers | Mechanical Engineering

A. $$\frac{{{{\text{V}}_1} - {{\text{V}}_2}}}{{{{\text{V}}_1}}}$$

B. $$\frac{{{\text{V}}_1^2 - {\text{V}}_2^2}}{{{\text{V}}_1^2}}$$

C. $$\frac{{{{\text{V}}_1}}}{{{{\text{V}}_1} - {{\text{V}}_2}}}$$

D. $$\frac{{{\text{V}}_1^2}}{{{\text{V}}_1^2 - {\text{V}}_2^2}}$$

A. To control the pressure variations due to rapid changes in the pipe line flow

B. To eliminate water hammer possibilities

C. To regulate flow of water to turbines by providing necessary retarding head of water

D. All of the above

A. Centroid of the displaced volume of fluid

B. Center of pressure of displaced volume

C. Does not exist

D. None of the above

A. Mass

B. Momentum

C. Energy

D. Work

A. $$\frac{{\text{d}}}{6}$$

B. $$\frac{{\text{d}}}{4}$$

C. $$\frac{{\text{d}}}{2}$$

D. $${\text{d}}$$

A. Vertical upward force through e.g. of body and center line of body

B. Buoyant force and the center line of body

C. Midpoint between e.g. and center of buoyancy

D. All of the above

A. Adhesion

B. Cohesion

C. Surface tension

D. Viscosity

A. Decrease

B. Increase

C. Remain unchanged

D. Depend upon the characteristics of liquid

A. $${\eta _{\text{h}}} = {\eta _{\text{o}}} \times {\eta _{\text{m}}}$$

B. $${\eta _{\text{m}}} = {\eta _{\text{o}}} \times {\eta _{\text{h}}}$$

C. $${\eta _{\text{o}}} = {\eta _{\text{h}}} \times {\eta _{\text{m}}}$$

D. None of these

A. Total energy per unit discharge

B. Total energy measured with respect to the datum passing through the bottom of the channel

C. Total energy measured above the horizontal datum

D. Kinetic energy plotted above the free surface of water