Dynamic pumps Flashcards
What are the 2 basic types of pump classifications?
- dynamic
- positive displacement
What type of pump moves fluids by using centrifugal force to spin it outwards over an impeller giving it velocity as the casing guides the fluid out of the pump?
dynamic pump
_______________ pumps are typically used to pump a high volume of fluid at relatively low discharge pressure.
dynamic pumps
As it concerns a dynamic pump, what is slip?
when the centrifugal force created by the impeller is the same as the resistance in the discharge pipe, and the impeller spins in the fluid
What are the 4 categories of dynamic pumps?
- radial flow
- axial flow
- mixed flow
- peripheral pumps
______________ pumps move fluids by trapping a fixed volume of the liquid in a pumping chamber and forcing it into a discharge pipe.
positive displacement pumps
Which type of pump can experience slip: positive displacement or dynamic?
dynamic
Which type of pump produces a fixed flow rate: positive displacement or dynamic?
positive displacement
Which type of pump has a constant flow rate regardless of pressure changes?
A. positive displacement pump
B. dynamic pump
A. positive displacement pump
Which type of pump has a varying flow rate depending on pressure or head?
A. positive displacement pump
B. dynamic pump
B. dynamic pump
Which type of pump will see a flow rate increase if the viscosity of the pumping medium increases?
A. positive displacement pump
B. dynamic pump
A. positive displacement pump
- this happens because the internal clearances are better filled
Which type of pump will see a flow rate drop as viscosity increases?
A. positive displacement pump
B. dynamic pump
B. dynamic pump
Which type of pump has a pulsating delivery?
A. positive displacement pump
B. dynamic pump
A. positive displacement pump
Which type of pump is able to produce very high pressures?
A. positive displacement pump
B. dynamic pump
A. positive displacement pump
Which type of pump would have a smooth continuous delivery?
A. positive displacement pump
B. dynamic pump
B. dynamic pump
Which type of pump is capable of creating lift or suction without a prime?
A. positive displacement pump
B. dynamic pump
A. positive displacement pump
Which type of pump needs to be primed to create a suction lift?
A. positive displacement pump
B. dynamic pump
B. dynamic pump
Which type of pump needs to operate above a minimum speed to create flow?
A. positive displacement pump
B. dynamic pump
B. dynamic pump
Which type of pump does not need a relief valve on the discharge side?
A. positive displacement pump
B. dynamic pump
A. dynamic displacement
_____________ is the mass or weight of a substance per unit of volume.
density
____________ ___________ (2 words) is the ratio of the density of a substance to that of water.
specific gravity
A substance that is lighter than water would have a specific gravity that is ___________ (less/more) than 1.
less
A substance that is heavier than water would have a specific gravity that is ___________ (less/more) than 1.
more
_______________ is a measure of intensity of effort described as force per unit of area.
pressure