The water in a jet propelled boat is drawn through the openings facing the direction of motion of the boat. The efficiency of propulsion is given by
A. $$\frac{{2{\text{v}}}}{{{{\text{V}}_{\text{r}}} - {\text{v}}}}$$
B. $$\frac{{2{\text{v}}}}{{{{\text{V}}_{\text{r}}} + {\text{v}}}}$$
C. $$\frac{{\text{V}}}{{{{\text{V}}_{\text{r}}} - {\text{v}}}}$$
D. $$\frac{{\text{V}}}{{{{\text{V}}_{\text{r}}} + {\text{v}}}}$$
Answer: Option B
This Question Belongs to Mechanical Engineering >> Hydraulics And Fluid Mechanics In ME
A flow in which the quantity of liquid flowing per second is constant, is called __________ flow.
A. Steady
B. Streamline
C. Turbulent
D. Unsteady
A hydraulic ram is a device used to
A. Store the energy of water
B. Increase the pressure of water
C. To lift water from deep wells
D. To lift small quantity of water to a greater height when a large quantity of water is available at a smaller height
A. The weight of the body
B. More than the weight of the body
C. Less than the weight of the body
D. Weight of the fluid displaced by the body
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