A pump is defined as a device which converts
- AHydraulic energy into mechanical energy
- BMechanical energy into hydraulic energyCorrect
- CKinetic energy into mechanical energy
- DElectrical energy into mechanical energy
Solution
Concept
Basic functional definition of a pump
Formula
NONE
Step-by-step solution
1. A pump receives energy from an external power source, such as an electric motor or engine. 2. This input energy provided to the pump impeller or piston is mechanical energy. 3. The pump transfers this mechanical energy to the fluid as pressure and kinetic hydraulic energy. Answer: B
Explanation
A pump is a mechanical device that takes mechanical work from a motor or engine and imparts it to a fluid. This increases the pressure and kinetic energy of the fluid, effectively transforming mechanical energy into hydraulic energy. Turbines perform the opposite operation by converting fluid energy back into mechanical work.
Why the other options are wrong
A) Converting hydraulic energy into mechanical energy describes the operation of a turbine. C) Converting kinetic energy into mechanical energy is performed by turbines. D) Converting electrical energy into mechanical energy is done by an electric motor.
Shortcut
Pump = Mechanical to Hydraulic energy; Turbine = Hydraulic to Mechanical energy.
Common mistake
Confusing the function of a pump with that of a turbine, which converts hydraulic energy into mechanical energy.
Correct answer: B) Mechanical energy into hydraulic energy