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Millwright Level 3 > Pumps > Flashcards

Pumps Flashcards

(80 cards)

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1
Q

A positive Displacement pump must not operate against a closed valve on what side of pump and why

A

Discharge side
Because it has no shutoff head like centrifugal pumps.
Will continue to produce flow and will the pressure in the Discharge line will increase until it blows.

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2
Q

Positive Displacement Pumps is high or low pressure

A

High
Only limited by the mechanical strength of the pump components and the horse power of the driver.

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3
Q

Positive Displacement Pumps have high or low suction lift .

A

High suction lift - self priming

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4
Q

Does a positive Displacement and dynamic pump need relief valve

A

Just positive Displacement

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5
Q

Can a positive Displacement pump handle air and vapor

A

Yes

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6
Q

Plunger pump =

A

Low cost
Mechanically simple
High pressure
High head or small lift required
Clean fluid only

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7
Q

How to adjust flow rate on plunger pump

A

Variable speed drive
Locknut

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8
Q

Plunger pump high or low cost

A

Low

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9
Q

Plunger pump low pressure or high pressure

A

High

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10
Q

Plunger pump high or low head

A

High

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11
Q

Plunger pump what kind of fluid can it pump

A

Only clean

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12
Q

What type of pump is this

A

Plunger

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13
Q

Piston pump=

A

High pressure
Known as double acting
4 check valves
Different volume per side

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14
Q

Piston pump high or low pressure

A

High

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15
Q

Piston pump is single acting or double acting

A

it’s known as double acting

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16
Q

Piston pump has how many check valves

A

4

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17
Q

Piston pump is the volume = on both sides

A

No because surface area is different because of rod

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18
Q

Diaphragm pump=

A

Extreme metering
Toxic or hazardous gas

Explosive environment-pneumatic

Can handle high suction lift
Small output 20-gpm
Pulsation

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19
Q

Diaphragm pump can handle what gas or liquid

A

Toxic or hazardous gas

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20
Q

Diaphragm pump has low or high suction lift

A

High

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21
Q

Diaphragm pump has high or low output

A

Low 20- gpm

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22
Q

Diaphragm pump has smooth flow?

A

No pulsating

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23
Q

This is what type of pump

A

Diaphragm

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24
Q

What type of pump

A

External gear pump

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25
26
What is this pump
Piston pump
27
What type of pump
Internal gear pump
28
What type of pump
Single lobe pump
29
What type of pump
Three lobe pump
30
What type of pump
Circumferential pump
31
How many two rotor pumps are there and what are they called
5 External gear pump Internal gear pump Single lobe pump Three lobe pump Circumferential piston pump
32
Screw pump =
Can handle high viscosity Sensitive to temp and viscosity changes Pulsation and vibration free Can handle abrasive material Self priming
33
Screw pump can handle ____ viscosity
High
34
What is screw pump sensitive too
Temp and viscosity changes
35
Screw pumps are free of what
Pulsation and vibration
36
Are screw pumps able to handle abrasive material
Yes
37
Do you have to prime a screw pump
No self priming
38
3 screw pump has how many female to male screws
2 female and 1 male is always on top ( sounds like a good time) lol 😆
39
What is this pump
Progressive cavity pump
40
What is this pump
Two screw pump
41
What is this pump
Three screw pump
42
What is this pump
Unbalanced vane pump
43
What is this pump
Balanced vane pump
44
What is this pump
External vane pump
45
What is this pump
Variable vane pump
46
What is this pump
Flexible vane pump
47
How many vane pumps are there and what are they called
5 Unbalanced vane pump Balanced vane pump Variable vane pump External vane pump Flexible vane pump
48
What is this pump
Flexible tube pump
49
What is this pump
Flexible liner pump
50
Flexible member pumps are used in
Hospital or chemical industry
51
Valves 4x
Check valve Foot valve Relief valve Pulsation dampener
52
What is most common dynamic pump
Radial flow centrifugal pump
53
What are the two basic forms of collector
Volute and diffuser
54
Radial flow pumps is used when
A resononbly high discharge head is required
55
Axial flow pump is also called what
Propeller pump
56
Axial pumps have what kind of suction and dischaerge head and flow
Little suction power Low discharge head Large flow
57
A foot mounted pump Vs center line mounted What is better for high temperatures
Center line for pumps handling liquids above 175 c Foot .mounted undesirable for high temp
58
Single stage end suction pumps are.
Most common centrifugal pump 75 percent of all centrifugal pumps
59
Single stage end suction pumps are what capacity
Used for low capacity and specific speeds or special applications
60
Can a single stage end suction pump be mounted vertical
Yes saves floor space
61
Dynamic Pumps have what volume and head
Large volume Low head
62
When a dynamic pump dead heads what happens to temperature
It rises
63
What kind of flow does a dynamic pump have
Continous non pulsating flow
64
Water is heaviest at what temp
4 c
65
Net positive suction head required has to be greater than what pressure
Vapour pressure
66
Npsha is ___ higher than npshr
10 percent
67
Radial flow pumps is ____ discharge head
High discharge head.
68
Axial flow pumps is ____ head
Extremely low head
69
Axial flow pumps needs ___ head
Suction head
70
Can an axial pump be mounted vertical
Yes
71
How is a mixed flow pump usually mounted
Vertically
72
Peripheral pump requires high what
Net positive suction head available Npsha
73
Regenerative turbine can pump what that a centrifugal pump cant
Gas
74
If cavitation is a concern what pump should be used
A regenrive turbine pump
75
For low flow high head what is better centrifugal or regenerative turbin pump
Regenerative turbine pump
76
Single casing radially split pump are held together with
Tie rods and heavy plates to prevent the casings from blowing apart
77
Single casing racially split pump are capable of withstanding _____ pressure with less ____
Higher Leakage
78
What is required on a single casing racially split pump
Balancing device
79
Can you take apart a single casing radial split pump with out disconnect hoses
No both suction and dischaerge needs to be disconnected.
80
Muti stage barrel pump ___ pressure ___capacity
High High

Millwright Level 3 (22 decks)

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