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Fluid Mech Pumps > Pumps > Flashcards

Pumps Flashcards

1
Q

is an equipment used to transfer fluid from a
region of low pressure to another region at same or
higher pressure. (PSME Code 1993)

A

Pump

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2
Q

invented the first force pump.

A

Ctesibius

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3
Q

When was the pump invented?

A

120BCE

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4
Q

A device or machine that compresses and/or
transports fluids usually by pressure or suction, or both;
may be used to remove water from a construction site or
to convey water from one elevation to another. (Harris,
C.M.; Dictionary of Architecture and Construction, 1975

A

Pump

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5
Q

What are the different classifications
of pumps?

A
  1. As to Operating Principle
  2. As to Casing Design
  3. As to Mounting
  4. As to Connection with Driver
    (Motor or Engine)
  5. As to Construction Materials
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6
Q

Classification of Pumps as to
Operating Principle:

A
  1. centrifugal
    2.positive displacement type
    3.turbine type
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7
Q

Operating Principle: Centrifugal Type

A
  1. Radial
  2. Axial
  3. Mixed
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8
Q

Operating principle: Positive displacement type

A
  1. Reciprocating Piston
  2. Reciprocating Plunger
  3. Rotary Blades
  4. Rotary Roots
  5. Screw types
  6. Gears
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9
Q

Operating Principle: Turbine Type

A
  1. Axial
  2. Mixed
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10
Q

Classification of Pumps as
to Casing Design:

A
  1. Horizontal Split Case
  2. Vertical Split Case
  3. Submerged
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11
Q

Classification of Pumps as
to Mounting:

A
  1. Base Mounted
  2. In – line Mounted
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12
Q

Classification of Pumps as to
Connection with Driver

A
  1. Flexible Coupled
  2. Case Coupled
  3. Belt Driven
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13
Q

Classification of Pump as to
Construction Materials:

A
  1. Cast Iron
  2. Stainless Steel
  3. Bronze
  4. Concrete
  5. Plastic
  6. Fiberglass
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14
Q

(Built by Osborne Reynolds, 1875) A vane or
impeller rotate inside a close-fitting case, draw in liquid at the center and,
by virtue of centrifugal force, throw liquid out through an opening in the
periphery of the case.

A

Centrifugal Pump

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15
Q

is basically a
centrifugal pump
complete with electric
motors which are
positioned underwater
in a suitable bored
hole that delivers the
water to the surface.

A

Submersible
Pump

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16
Q

What are the important considerations for
accurate Submersible Pump selection?

A
  1. Well Diameter
  2. Well Depth
    3.Pumping Water Level
  3. Drawdown
  4. Head above Datum
  5. Pump Capacity
  6. Pump Setting
  7. Water Composition
  8. Type of Drive
  9. Allowable Motor Overload
17
Q

indicates the size of
the pump to be installed.

A

Well Diameter

18
Q

indicates the Static Water
Level, the vertical distance from the surface
(Datum Line) to the water level when no
water is being pump.

A

Well Depth

19
Q

the vertical
distance from the Datum Line to the water
level when specified capacity is being
pumped. During the pumping test, Pumping
Water Level is the depth of water when the
amount of water withdrawn from the well &
the amount of replenishment of water to the
well is equal.

A

Pumping water level

20
Q

the vertical distance or the
difference between the Pumping Water
Level and the Static Water Level

A

Drawdown

21
Q

indicates the
Total Discharge Head (Static plus Friction)
between Datum line & point of
measurement.

A

Head above datum

22
Q

– volume rate of flow
expressed in cubic meters per hour or liters
per second to be produced by the pump.

A

Pump Capacity

23
Q

the nominal vertical
distance (in meters) from Datum to the
discharge pipe connection at the pump.

A

Pump Setting

24
Q

make-up of the
water to be pumped.

A

Water Composition

25
Q

the specification of the
available power source (single phase or 3 phase)

A

Type of Drive

26
Q

percentage of rated motor main plate power
(in kilowatts or horsepower) that will be
permitted to be used.

A

Allowable Motor Overload

27
Q

A pump which operates with a to and fro motion.

A

Reciprocating Pump

28
Q

The different types of Reciprocating Pumps are:

A
  1. Lift Pump
  2. Piston or Plunger Pump
  3. Deep-well Piston Pump
29
Q

The simplest of the reciprocating pump and consists of a
piston moving up and down in a cylinder or barrel.

A

Lift Pump

30
Q

A plunger is driven backwards &
forwards, or up & down by a mechanical working head.

A

Piston or Plunger Pump

31
Q

When water is more than 7.50 meters
below the ground, it is virtually necessary to place the pump in or near the water in the well and pump from there. Water is forced up the drop pipe and out into the delivery pipe.

A

Deep-well Piston Pump

32
Q

a displacement pump in which a flexible diaphragm replaces the piston in other displacement pumps.

A

Diaphragm Pump

33
Q

used primarily as a source of fluid power in hydraulic system. It continuously scoops the liquid from the pump chamber.

A

Rotary Pump

34
Q

Rotary Pump is classified with respect to the impelling element as:

A
  1. Gear type
  2. Vane type
  3. Piston type
35
Q

is a pump
consisting revolving impeller in the
pump housing which forces water
down a pressure line to an ejector
assembly below water level. This
ejector consists of a nozzle which
discharges the water into a
constricted throat. This throat
leads from a suction pipe. This
arrangement permits energy of a
high pressure fluid to be converted
into a high velocity fluid.

A

Jet Pump

36
Q

uses the energy
of falling water to raise a smaller
quantity of water to greater
heights. It is a pump in which the
power generated from flowing in
an enclosed pipe is used to raise
part of the water to a height above
that from which the flow began.

A

Hydraulic Ram or Ram Pump

37
Q

The characteristic curve of a
pump describes the factors
that affect its performance.
They are usually expressed
graphically with the rate of
discharge (Q) as abscissa &
other factors plotted as
ordinates, such as the Head
(H), & the Net Positive
Suction Head (NPSH). All
pump manufacturers supply
performance characteristic
curves for their pumps which
indicate how the pump
capacity varies with
discharge pressure or
suction pressure.

A

Pump performance curve

Fluid Mech Pumps (1 decks)

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