Question

What factors limit the amount of water entering a water pump when the handle is pulled once with a constant force?

• A. Cross sectional area of nozzle.
• B. Cross sectional area of pump.
• C. Difference of external atmospheric pressure and pressure inside the pump.
• D. All of the above.

Answer 1

The correct option is D All of the above.

Cross sectional area is a prime factor in deciding the pressure inside the pump when the handle is pulled back and hence, the intensity with which water from outside will be sucked. Nozzle cross section decides the velocity of water that enters the pump. Difference in pressure inside and outside the pump is the primary driving force in the functioning of the pumps and when the difference is more, more amount of water is sucked in.