Hydraulics And Fluid Mechanics MCQ Questions & Answers | Mechanical Engineering

A. Supersonics, as with projectiles and jet propulsion

B. Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc.

C. Simultaneous motion through two fluids where there is a surface of discontinuity, gravity force, and wave making effects, as with ship's hulls

D. All of the above

A. The metal piece will simply float over the mercury

B. The metal piece will be immersed in mercury by half

C. Whole of the metal piece will be immersed with its top surface just at mercury level

D. Metal piece will sink to the bottom

A. 0.5

B. 0.4

C. 0.515

D. 0.5

A. $${\text{w}} \times {\text{Q}} \times {\text{H}}$$

B. $${\text{w}} \times {\text{Q}} \times {{\text{h}}_{\text{f}}}$$

C. $${\text{w}} \times {\text{Q}}\left( {{\text{H}} - {{\text{h}}_{\text{f}}}} \right)$$

D. $${\text{w}} \times {\text{Q}}\left( {{\text{H}} + {{\text{h}}_{\text{f}}}} \right)$$

A. Designing new impeller

B. Trimming the impeller size to the required size by machining

C. Not possible

D. Some other alterations in the impeller

A. Avoid interruption in the flow

B. Increase discharge

C. Increase velocity

D. Maintain pressure difference

A. Maximum

B. Minimum

C. Zero

D. Nonzero and finite

A. $${\text{K}} \times \rho $$

B. $$\frac{{\text{K}}}{\rho }$$

C. $$\frac{\rho }{{\text{K}}}$$

D. None of these

A. Varies as the square of the radial distance

B. Increases linearly as its radial distance

C. Increases as the square of the radial distance

D. Decreases as the square of the radial distance

A. Tensile stress

B. Compressive stress

C. Shear stress

D. Bending stress