Pumps Flashcards

1
Q

A pump may be simply defined as a device used to move a _____ or ____ from one place to another

A

liquid or gas

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2
Q

Although water is the most frequently pumped substance, any substance which can be changed into a _____ can be pumped

A

fluid

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3
Q

Pump Classifications:
According to their method of operation, pumps can be divided into two main classifications;

  1. Positive _______
  2. _________ (Refrigeration Trade)
A
  1. positive displacement

2. centrifugal

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4
Q

Pump Selection Factors:

  1. Pressure ______
  2. Volume of ______ to be pumped
  3. Location of the _____
  4. specific _______ of the fluid
A
  1. required
  2. liquid
  3. pump
  4. specific gravity of the fluid
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5
Q

Pump Applications:

Examples; name a few

A
  1. boiler feed water pumps
  2. condensate pumps
  3. fuel oil pumps
  4. chemical feed pumps
  5. fire pumps
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6
Q

Terms and Definitions: Pump Head; T or F

Pump head is the pressure that a pump has to overcome to be able to move liquid through the system. This pressure is expressed in one of the following; psi, kPa, bar

A

True

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7
Q

Pump terms:

  1. Capacity: volume measured in ______ per minute (GPM)
  2. Head: Pressure at the base of a column of water is usually measured by the height of the water column in ____
A
  1. gallons per minute

2. feet

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8
Q

Pump terms:

  1. The pressure is then converted to a height of a column in which the pumped liquid can _______
  2. This height is measured in feet or meters and is simply called head or head ______
A
  1. maintain

2. pressure

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9
Q

Never turn the inlet of your pump off when testing or it will capitate and break the pump, you can, however, turn the discharge off and your pressure should go __

A

up

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10
Q

Net Positive Suction Head (NPSH) :

  1. A minimum positive pressure at the pump suction flange is required to prevent ________. which is the formation of vapour bubbles
A

cavitation

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11
Q

Static Suction head is the vertical distance from the liquid supply level to the pump centreline when the liquid supply level is above the pump ________

A

centerline

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12
Q

Static discharge head is the vertical distance from the pump centreline to either the surface of the liquid in the discharge tank or go to the point of _______

A

discharge

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13
Q

Total static head is the vertical distance from the liquid ______ level to the surface of the liquid in the discharge tank or to the point of discharge

A

supply

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14
Q

Frictional Loss:

Frictional loss is the ______ needed by the fluid to overcome friction as it moves through the piping, valves, and fittings in the system

A

pressure

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15
Q

Velocity Head:

Velocity head is the force causing the fluid to flow through a chamber which is due to the ______ of the liquid

A

velocity

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16
Q

Dynamic Suction Lift:

Dynamic lift is equivalent to the static suction lift plus the velocity head, minus all the _______ losses in the suction pipes and fittings

A

frictional

17
Q

Dynamic Suction Head: T or F

Dynamic suction head is equivalent to the static suction head minus the velocity head and all the frictional losses In the suction pipes and fittings

A

True

18
Q

Dynamic discharge head: T or F

dynamic discharge head is equivalent to the static head plus the velocity head and all the frictional losses in the discharge pipes and fittings

A

true

19
Q

Total dynamic head is the term most used in industry to describe a pumps head:

T or F? Dynamic head equals the dynamic suction lift plus the dynamic discharge head

A

True

20
Q

Total dynamic head: * Systems with Suction head*

For pumping systems which have a suction head, as illustrated, the total dynamic head equals the dynamic head minus the dynamic suction head

A

true

21
Q

Centrifugal Pumps:

These pumps use an impeller to move the water. The water is driven by the impeller and moves with a greater velocity at the outlet, creating a low pressure area at the _____

A

inlet

22
Q

If a pump is leaking, what should be your first and second instinct on replacement parts?

A
  1. shaft seal

2. gasket

23
Q

If shaft seal is leaking on pump, look if the ____ on shaft seal is dripping

A

hole

24
Q

Shaft seal has an engineered channel that goes to a hole so that the water will drip out of the whole and not into the _____

A

motor