Hydraulics And Fluid Mechanics MCQ Questions & Answers | Mechanical Engineering

A. Two jets

B. Two runners

C. Four jets

D. Four runners

A. $$\frac{l}{{{{\text{d}}^2}}} = \frac{{{l_1}}}{{{\text{d}}_1^2}} + \frac{{{l_2}}}{{{\text{d}}_2^2}} + \frac{{{l_3}}}{{{\text{d}}_3^2}}$$

B. $$\frac{l}{{{{\text{d}}^3}}} = \frac{{{l_1}}}{{{\text{d}}_1^3}} + \frac{{{l_2}}}{{{\text{d}}_2^3}} + \frac{{{l_3}}}{{{\text{d}}_3^3}}$$

C. $$\frac{l}{{{{\text{d}}^4}}} = \frac{{{l_1}}}{{{\text{d}}_1^4}} + \frac{{{l_2}}}{{{\text{d}}_2^4}} + \frac{{{l_3}}}{{{\text{d}}_3^4}}$$

D. $$\frac{l}{{{{\text{d}}^5}}} = \frac{{{l_1}}}{{{\text{d}}_1^5}} + \frac{{{l_2}}}{{{\text{d}}_2^5}} + \frac{{{l_3}}}{{{\text{d}}_3^5}}$$

A. Only when the fluid is frictionless

B. Only when the fluid is incompressible and has zero viscosity

C. When there is no motion of one fluid layer relative to an adjacent layer

D. Irrespective of the motion of one fluid layer relative to an adjacent layer

A. Smoothen flow

B. Reduce acceleration to minimum

C. Increase pump efficiency

D. Save pump from cavitations

A. 10-15°

B. 20-25°

C. 30-40°

D. 50-60°

A. $$\frac{{{\text{N}}\sqrt {\text{Q}} }}{{{{\text{H}}^{\frac{2}{3}}}}}$$

B. $$\frac{{{\text{N}}\sqrt {\text{Q}} }}{{{{\text{H}}^{\frac{3}{4}}}}}$$

C. $$\frac{{{\text{N}}\sqrt {\text{Q}} }}{{\text{H}}}$$

D. $$\frac{{{\text{N}}\sqrt {\text{Q}} }}{{{{\text{H}}^{\frac{5}{4}}}}}$$

A. The water flows parallel to the axis of the wheel

B. The water enters at the centre of the wheel and then flows towards the outer periphery of the wheel

C. The water enters the wheel at the outer periphery and then flows towards the centre of the wheel

D. The flow of water is partly radial and partly axial

A. The water flows parallel to the axis of the wheel

B. The water enters at the center of the wheel and then flows towards the outer periphery of the wheel

C. The water enters the wheel at the outer periphery and then flows towards the center of the wheel

D. The flow of water is partly radial and partly axial

A. Same

B. 0.75 B.H.P

C. $$\frac{{{\text{B}}{\text{.H}}{\text{.P}}{\text{.}}}}{{0.75}}$$

D. 1.5 B.H.P

A. $$\frac{{2\left( {{{\text{V}}_{\text{r}}} - {\text{v}}} \right){\text{v}}}}{{{\text{V}}_{\text{r}}^2}}$$

B. $$\frac{{2\left( {{{\text{V}}_{\text{r}}} + {\text{v}}} \right){\text{v}}}}{{{\text{V}}_{\text{r}}^2}}$$

C. $$\frac{{\left( {{{\text{V}}_{\text{r}}} - {\text{v}}} \right){\text{v}}}}{{{{\text{V}}_{\text{r}}}}}$$

D. $$\frac{{\left( {{{\text{V}}_{\text{r}}} + {\text{v}}} \right){\text{v}}}}{{{{\text{V}}_{\text{r}}}}}$$