pumps and motors Flashcards
(25 cards)
What is the primary function of a pump?
To move fluids from one place to another.
True or False: A motor converts electrical energy into mechanical energy.
True
Fill in the blank: The two main types of pumps are __________ and __________.
positive displacement pumps, dynamic pumps
What is a centrifugal pump?
A type of dynamic pump that uses rotational energy to move fluid.
What does the term ‘head’ refer to in pump terminology?
The height of fluid that a pump can raise.
What is the purpose of a motor’s rotor?
To convert electrical energy into rotational motion.
Multiple Choice: Which of the following is NOT a type of motor? A) AC Motor B) DC Motor C) Hydraulic Motor D) Thermal Motor
D) Thermal Motor
What is the main advantage of a positive displacement pump?
It can handle viscous fluids effectively.
True or False: Motors can only be powered by electricity.
False
What is the function of a pump impeller?
To impart kinetic energy to the fluid.
Fill in the blank: The efficiency of a pump is defined as the ratio of __________ to __________.
useful work output, total energy input
What type of motor is commonly used in household appliances?
Induction motor
Multiple Choice: Which factor does NOT affect pump performance? A) Fluid viscosity B) Pump speed C) Motor type D) Ambient temperature
D) Ambient temperature
What is a gear pump?
A type of positive displacement pump that uses gears to move fluid.
True or False: Submersible pumps are designed to operate above ground.
False
What is the role of bearings in a motor?
To reduce friction between rotating and stationary parts.
Fill in the blank: The term ‘NPSH’ stands for __________.
Net Positive Suction Head
What is a diaphragm pump?
A type of positive displacement pump that uses a diaphragm to move fluid.
Multiple Choice: Which motor type is typically more efficient at higher speeds? A) Synchronous Motor B) Asynchronous Motor C) Stepper Motor D) Universal Motor
A) Synchronous Motor
What is the primary disadvantage of centrifugal pumps?
They are not effective for high-viscosity fluids.
True or False: Motors can operate on both AC and DC power.
True
What does ‘pump cavitation’ refer to?
The formation of vapor bubbles in a pump that can cause damage.
Fill in the blank: A __________ motor is designed to run at a constant speed regardless of load.
synchronous
What is the main purpose of a pump’s discharge valve?
To control the flow of fluid out of the pump.
