Pumps at University Of Witwatersrand | Flashcards & Summaries

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Lernmaterialien für pumps an der University of Witwatersrand

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TESTE DEIN WISSEN
State ONE function of a pump
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TESTE DEIN WISSEN
A pump is a mechanical device used to raise a fluid from a lower to a higher level.
Lösung ausblenden
TESTE DEIN WISSEN
Complete the following sentences by filling in the missing word(s). Write only the word(s) next to the question number (7.1-7.4) in the answer book.
  • Reciprocating pumps are......displacement pumps
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TESTE DEIN WISSEN
  • Positive
Lösung ausblenden
TESTE DEIN WISSEN
Name the type of reciprocating pump that are described below:
  •  Has only one inlet and one delivery valve.
  • Liquid is drawn in and delivered during the same stroke.
  • The high-pressure seal reciprocates with the piston.
Lösung anzeigen
TESTE DEIN WISSEN
  • Single-acting pump
  • Double-acting pump
  • Piston pump
Lösung ausblenden
TESTE DEIN WISSEN
Complete the following sentences by filling in the missing word(s). Write only the word(s) next to the question number (7.1-7.4) in the answer book.
7.2 A plunger is......than its stroke length and a piston is......than its stroke length.
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TESTE DEIN WISSEN
  • Longer and shorter
Lösung ausblenden
TESTE DEIN WISSEN
Complete the following sentences by filling in the missing word(s). Write only the word(s) next to the question number (7.1-7.4) in the answer book
  • The rotating element of a centrifugal pump is called an impeller. The rotating element of a rotary pump is called a.....
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TESTE DEIN WISSEN
  • Rotor
Lösung ausblenden
TESTE DEIN WISSEN
Name the THREE categories into which pumps are classified
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TESTE DEIN WISSEN
  • Centrifugal pump
  • Reciprocating pump
  • Rotary pump
Lösung ausblenden
TESTE DEIN WISSEN
State TWO methods of neutralising water hammer in plunger pumps.
Lösung anzeigen
TESTE DEIN WISSEN
  • Open and close valves gradually
  • Use an air chamber in the delivery line
Lösung ausblenden
TESTE DEIN WISSEN
Briefly explain the operation of a centrifugal pump
Lösung anzeigen
TESTE DEIN WISSEN
As water circulates inside the casing a vortex is created at the centre, which causes a vacuum. This vacuum allows more water to be drawn into the casing. A centrifugal force causes the water at the outside circumference of the casing to be forced through the delivery outlet
Lösung ausblenden
TESTE DEIN WISSEN
Briefly explain the operation of a gear pump
Lösung anzeigen
TESTE DEIN WISSEN
As the gear teeth unmesh, a vacuum is created at the inlet. Fluid flows in the spaces between the gear teeth mesh again at the outlet, the fluid is forced out.
Lösung ausblenden
TESTE DEIN WISSEN
Complete the following sentences by filling in the missing word(s). Write only the word(s) next to the question number (7.1-7.4) in the ANSWER BOOK
7.1) Single-acting pumps have one......and one......
Lösung anzeigen
TESTE DEIN WISSEN
  • 7.1) Inlet valve and outlet valve

Lösung ausblenden
TESTE DEIN WISSEN
Figure below shows the operation of a plunger pump
Study the diagram and answer the questions
State the type of displacement that occurs in this pump
Lösung anzeigen
TESTE DEIN WISSEN
  • Positive displacement
Lösung ausblenden
TESTE DEIN WISSEN
Give  one function of a stuffing box assembly in centrifugal and reciprocating pumps.
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TESTE DEIN WISSEN
  • Houses the the packing or sealing material
  • Guides the linear movement of the shaft or piston rod
  • Prevents the escape of fluid past the piston rod
Lösung ausblenden
  • 38398 Karteikarten
  • 3399 Studierende
  • 33 Lernmaterialien
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Beispielhafte Karteikarten für deinen pumps Kurs an der University of Witwatersrand - von Kommilitonen auf StudySmarter erstellt!

Q:
State ONE function of a pump
A:
A pump is a mechanical device used to raise a fluid from a lower to a higher level.
Q:
Complete the following sentences by filling in the missing word(s). Write only the word(s) next to the question number (7.1-7.4) in the answer book.
  • Reciprocating pumps are......displacement pumps
A:
  • Positive
Q:
Name the type of reciprocating pump that are described below:
  •  Has only one inlet and one delivery valve.
  • Liquid is drawn in and delivered during the same stroke.
  • The high-pressure seal reciprocates with the piston.
A:
  • Single-acting pump
  • Double-acting pump
  • Piston pump
Q:
Complete the following sentences by filling in the missing word(s). Write only the word(s) next to the question number (7.1-7.4) in the answer book.
7.2 A plunger is......than its stroke length and a piston is......than its stroke length.
A:
  • Longer and shorter
Q:
Complete the following sentences by filling in the missing word(s). Write only the word(s) next to the question number (7.1-7.4) in the answer book
  • The rotating element of a centrifugal pump is called an impeller. The rotating element of a rotary pump is called a.....
A:
  • Rotor
Mehr Karteikarten anzeigen
Q:
Name the THREE categories into which pumps are classified
A:
  • Centrifugal pump
  • Reciprocating pump
  • Rotary pump
Q:
State TWO methods of neutralising water hammer in plunger pumps.
A:
  • Open and close valves gradually
  • Use an air chamber in the delivery line
Q:
Briefly explain the operation of a centrifugal pump
A:
As water circulates inside the casing a vortex is created at the centre, which causes a vacuum. This vacuum allows more water to be drawn into the casing. A centrifugal force causes the water at the outside circumference of the casing to be forced through the delivery outlet
Q:
Briefly explain the operation of a gear pump
A:
As the gear teeth unmesh, a vacuum is created at the inlet. Fluid flows in the spaces between the gear teeth mesh again at the outlet, the fluid is forced out.
Q:
Complete the following sentences by filling in the missing word(s). Write only the word(s) next to the question number (7.1-7.4) in the ANSWER BOOK
7.1) Single-acting pumps have one......and one......
A:
  • 7.1) Inlet valve and outlet valve

Q:
Figure below shows the operation of a plunger pump
Study the diagram and answer the questions
State the type of displacement that occurs in this pump
A:
  • Positive displacement
Q:
Give  one function of a stuffing box assembly in centrifugal and reciprocating pumps.
A:
  • Houses the the packing or sealing material
  • Guides the linear movement of the shaft or piston rod
  • Prevents the escape of fluid past the piston rod
pumps

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