Hydraulics And Fluid Mechanics MCQ Questions & Answers | Mechanical Engineering

A. The centrifugal pump is suitable for large discharge and smaller heads

B. The centrifugal pump requires less floor area and simple foundation as compared to reciprocating pump

C. The efficiency of centrifugal pump is less as compared to reciprocating pump

D. All of the above

A. In an impulse turbine, the water impinges on the buckets with pressure energy.

B. In a reaction turbine, the water glides over the moving vanes with kinetic energy.

C. In an impulse turbine, the pressure of the flowing water remains unchanged and is equal to atmospheric pressure.

D. In a reaction turbine, the pressure of the flowing water increases after gliding over the vanes.

A. $$\frac{{{{\left( {{{\text{v}}_1} - {{\text{v}}_2}} \right)}^2}}}{{\text{g}}}$$

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

C. $$\frac{{{{\left( {{{\text{v}}_1} - {{\text{v}}_2}} \right)}^2}}}{{2{\text{g}}}}$$

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

A. Straight

B. Bent forward

C. Bent backward

D. Radial

A. Delivers unit discharge under unit head

B. Delivers unit discharge under unit speed

C. Develops unit power under unit head

D. Develops unit power under unit speed

A. $$\frac{{{\text{w}}{{\text{H}}_{\text{m}}}}}{{{\text{Q}} \times {\eta _{\text{o}}}}}$$

B. $$\frac{{{\text{wQ}}{{\text{H}}_{\text{m}}}}}{{{\eta _{\text{o}}}}}$$

C. $$\frac{{{\text{wQ}}}}{{{{\text{H}}_{\text{m}}} \times {\eta _{\text{o}}}}}$$

D. $$\frac{{{\text{wQ}} \times {\eta _{\text{o}}}}}{{{{\text{H}}_{\text{m}}}}}$$

A. $$\frac{2}{3} \times {{\text{C}}_{\text{d}}}\left( {{\text{L}} - {\text{nH}}} \right) \times \sqrt {2{\text{gh}}} $$

B. $$\frac{2}{3} \times {{\text{C}}_{\text{d}}}\left( {{\text{L}} - 0.1{\text{nH}}} \right) \times \sqrt {2{\text{g}}} \times {{\text{H}}^{\frac{3}{2}}}$$

C. $$\frac{2}{3} \times {{\text{C}}_{\text{d}}}\left( {{\text{L}} - {\text{nH}}} \right) \times \sqrt {2{\text{g}}} \times {{\text{H}}^2}$$

D. $$\frac{2}{3} \times {{\text{C}}_{\text{d}}}\left( {{\text{L}} - {\text{nH}}} \right) \times \sqrt {2{\text{g}}} \times {{\text{H}}^{\frac{5}{2}}}$$

A. Expands

B. Does not change

C. Contracts

D. None of these

A. $${\text{Q}} = \frac{2}{3} \times {{\text{C}}_{\text{d}}} \times {\text{b}}\sqrt {2{\text{g}}} \left( {{{\text{H}}_2} - {{\text{H}}_1}} \right)$$

B. $${\text{Q}} = \frac{2}{3} \times {{\text{C}}_{\text{d}}} \times {\text{b}}\sqrt {2{\text{g}}} \left( {{\text{H}}_2^{\frac{1}{2}} - {\text{H}}_1^{\frac{1}{2}}} \right)$$

C. $${\text{Q}} = \frac{2}{3} \times {{\text{C}}_{\text{d}}} \times {\text{b}}\sqrt {2{\text{g}}} \left( {{\text{H}}_2^{\frac{3}{2}} - {\text{H}}_1^{\frac{3}{2}}} \right)$$

D. $${\text{Q}} = \frac{2}{3} \times {{\text{C}}_{\text{d}}} \times {\text{b}}\sqrt {2{\text{g}}} \left( {{\text{H}}_2^2 - {\text{H}}_1^2} \right)$$

A. $$\frac{{{I_{\text{G}}}{{\sin }^2}\theta }}{{{\text{A}}\overline {\text{x}} }}{\text{ below}}$$

B. $$\frac{{{I_{\text{G}}}{{\sin }^2}\theta }}{{{\text{A}}\overline {\text{x}} }}{\text{ above}}$$

C. $$\frac{{{I_{\text{G}}}\sin \theta }}{{{\text{A}}\overline {\text{x}} }}{\text{ below}}$$

D. $$\frac{{{I_{\text{G}}}\sin \theta }}{{{\text{A}}\overline {\text{x}} }}{\text{ above}}$$