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Mechanical Science Centrifugal Pumps > Centrifugal Pumps > Flashcards

Centrifugal Pumps Flashcards

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1
Q

Applications of Centrifugal Pumps

A

Oil and Energy
Industrial and Fire Protection Industry
Waste Management, Agricultural and Manufacturing
Pharmaceutica;, Chemical and Food Industries
Various Industries

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2
Q

Classifications of Pumps

A

Centrifugal Pump
Positive Displacement Pump

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3
Q

How does a Centrifugal Pump work?

A

By centrifugal force. Centrifugal force is the outward force acting on a rotating body.

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4
Q

It is the most common type of pump in DOE facilities

A

Centrifugal Pump

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5
Q

T or F . Centrifugal Pumps enjoy widespread applications partly due to their ability to operate over a wide range of flow rates and pump heads.

A

T

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6
Q

Main parts of a Centrifugal Pump

A

Wet end
Mechanical end

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7
Q

It is the part of the pump that dictates the hydraulic performance of pump.

A

Wet end

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8
Q

Components of the wet end part of centrifugal pump

A

Impeller
Casing

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9
Q

This includes the parts that support the impeller within the casing, seal the casing where the shaft passes through it and enable rotation.

A

Mechanical end

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10
Q

Components of the mechanical end of a centrifugal pump

A

Pump shaft
Shaft sleeves
Bearings
Sealing arrangement

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11
Q

A stationary pump casing has a?

A

Small drain for flushing
Vent fittings for removing air

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12
Q

It is the region that expands in cross sectional area as it wraps around the pump casing.

A

Volute

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13
Q

It converts velocity head to static pressure

A

Volute

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14
Q

It is a set of stationary vanes that surround the impeller

A

Diffuser

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15
Q

It increases the pump efficiency by allowing a more gradual expansion and less turbulent area for the liquid to reduce velocity.

A

Diffuser

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16
Q

Classifications of an Impeler.

A

Single suction
Double suction

17
Q

T or F. Impellers can be open, semi-open, or enclosed

A

T

18
Q

It maintains a hydraulic balance of axial trust.

A

Balancing holes

19
Q

It is the loss of pumping capacity due to fluid leakage from the discharge side to the inlet side.

A

Pump slip

20
Q

It is used to maintain the pump’s minimum flow

A

Recirculation line

21
Q

It happens when a centrifugal pump operates with no flow through the pump due to a closed or blocked discharge valve.

A

Deadheading

22
Q

It is used to increase the discharge pressure of a pump

A

Multi-stage Centrfugal Pump

23
Q

Defined as that portion of centrifugal pump consisting of one impeller and its associated components

A

Pump stage

24
Q

T or F. Centrifugal pumps are self cooling

A

T

25
Q

What are the most common component of Centrifugal Pumps?

A

Wearing Rings
Stuffing Boxes
Packing
Lantern Rings

26
Q

It is a replaceable component that is attached to the impeller and/or the pump casing.

A

Wearing Rings

27
Q

It is designed to be replaced periodically.

A

Wearing rings

28
Q

It is a space wherein packings materials are placed in.

A

Stuffing box

29
Q

This is stored in stuffing box that forms a seal to control the rate of leakage along the shaft.

A

Packing

30
Q

T or F. Stuffing boxes allow a small amount of controlled leakage along the shaft.

A

T

31
Q

This is a perforated hollow ring that distributes the liquid uniformly around the shaft.

A

Lantern Ring

32
Q

It is used as an alternative to adequately seal the shaft

A

Mechanical Seal

33
Q

These elements have highly polished rotating and stationary element that come into contact to form a seal.

A

Mechanical Seal

34
Q
A

Mechanical Science Centrifugal Pumps (1 decks)

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