Deck 4: Pumps

Question 1

The first reciprocating pump was invented:

A) 200 BC
B) 100AD
C) 1600
D) 1851

Answer 1

200 BC

Question 2

NPSH stands for:

A) normal positive suction head
B) national positive suction height
C) net positive standard head
D) net positive suction head

Answer 2

net positive suction head

Question 3

Multistage centrifugal pumps include two or more:

A) discharge chambers
B) power gears
C) impellers
D) suction chambers

Answer 3

impellers

Question 4

Acceleration head is defined as:

A) the fluctuations of suction pressure created by the intake stroke of a reciprocating pump.
B) the formation and collapse of gas pockets around the impellers during pump operation.
C) equivalent head in feet of liquid necessary to push the required fluid into a pump.
D) the percentage of fluid that leaks or slips past the internal clearances of a pump over a given time.
E) the difference between how much liquid a pump can move versus how much it actually moves.

Question 5

A pulsation dampener is designed to:

A) absorb cyclical flow variations
B) sends a cancellation pulse into a PD pump
C) provides storage for excess flow
D) electrical pulse converter

Question 6

The first true centrifugal pump was not invented until:

A) 1600
B) 1851
C) 200BC
D) 100AD

Question 7

The advantages of a centrifugal pump include all of the following except:

A) cheaper
B) deliver a more constant rate
C) easier to install
D) work well with liquid & gas phase

Question 8

A progressive cavity pump typically has _____ screw(s).

A) one
B) two
C) three
D) b and c

Question 9

The impeller design on a centrifugal pump come in all the following designs except:

A) inlet vane tip
B) open
C) closed
D) semi-open

Question 10

The two most common classifications for pumps are:

A) centrifugal and positive displacement
B) rotary and reciprocating
C) positive displacement and dynamic
D) axial and centrifugal

Question 11

A safety device used to prevent positive displacement pumps from over pressuring is:

A) safety valve
B) sentinal valve
C) relief valve
D) a & c

Question 12

The first reciprocating pumps were invented by:

A) Ctesibius and Achilles
B) Archimedes and Papin
C) Appold and Thomas
D) Archimedes and Ctesibius

Question 13

The major components of a centrifugal pump and driver include all of the following except:

A) volute
B) outer casing
C) suction eye
D) impellers
E) wear rings
F) lobes
G) motor
H) shaft
I) shaft coupling
J) discharge
K) piston
L) internal gear
M) shaft bearings
N) shaft seals

Question 14

The factors that effect a pumps suction pressure include all of the following except:

A) temperature
B) viscosity
C) pressure
D) type of pump
E) line restriction

Question 15

The best operating condition for a pump can be found on a(n):

A) flow chart trend
B) SPC chart
C) efficiency curve
D) partial correlation curve

Question 16

Dynamic pumps come in all the following designs and applications except:

A) vertical or horizontal
B) single stage or multi-stage
C) rotary
D) axial

Question 17

Select the pumps whose discharge should never be blocked during operation:

A) lobe
B) centrifugal single stage
C) gear
D) vane
E) axial
F) screw
G) centrifugal multi stage

Question 18

Viscosity is defined as:

A) the thickness of a fluid
B) a fluids resistance to flow
C) amount of heat a fluid can absorb
D) fluid density

Question 19

Positive displacement pumps:

A) displace varying volumes of fluid through rotary or reciprocating
B) displace a specific volume of liquid
C) centrifugally spin liquid
D) axially propel a specific volume of liquid

Question 20

Positive displacement pumps come in ________ basic designs.

A) one
B) two
C) three
D) four

Question 21

An external gear pump includes all of the following components except:

A) power gear
B) casing
C) idler gear
D) spacer

Question 22

If the upper gear in an external gear pump is turning counter-clockwise, which way is the lower gear turning?

A) counter-clockwise
B) clockwise

Question 23

In a centrifugal pump, liquid is ___________ into the suction eye.

A) sucked
B) pushed

Question 24

Fluid movement through an external gear pump most closely reflects which statement(s):

A) trapped between teeth and swept around the outside casing
B) trapped between teeth and swept around and between the gears
C) swept counter-clockwise and clockwise around the outer casing
D) a & c

Question 25

Cavitation occurs when:

A) suction pressure drops below NPSH
B) suction pressure drops below NPDH
C) liquid in the pumping chamber boils
D) a & c

Question 26

List six rotary type pumps:

Question 27

List three reciprocating pumps:

Question 28

Internal slip is defined as:

A) fluctuations of suction pressure created by the intake stroke.
B) % of fluid that leaks by the internal clearances over a given time.
C) difference between how much liquid a pump can move versus how much it actually does.
D) b & c

Question 29

The basic components of a centrifugal pump include all of the following except:

A) volute
B) impeller
C) piston
D) suction eye

Question 30

The modern replacement for a pump's stuffing box is:

A) they have not been replaced
B) carbon rings
C) mechanical seals
D) spring cartridges

Question 31

List two drivers commonly used in industry:

Question 32

Positive displacement pumps come in two basic designs:

A) rotary and reciprocating
B) screw and vane
C) piston and plunger
D) axial and centrifugal

Question 33

The inlet side of a pump is often referred to by operators as the:

A) discharge side
B) suction side
C) volute eye side
D) process lift side

Question 34

A ________________ consists of two sealing elements; one is stationary, usually carbon, the other rotates with the shaft providing an air tight seal that requires little maintenance.

A) labyrinth seal
B) radial bearing
C) packing gland and packing
D) mechanical seal

Question 35

A pump curve identifies:

A) a pumps unique characteristics
B) the best operating condition for a pump
C) life time rates for pumps
D) PD pump and centrifugal pump comparisons

Question 36

Shaft thrust can be minimized in a multi-stage centrifugal pump by:

A) inserting multiple thrust seals
B) opposite alignment of impellers
C) use of balance device
D) b & c

Question 37

The following device(s) are/is equipped with a spacer:

A) external gear pump
B) internal gear pump
C) lobe
D) screw

Question 38

Which side of the impeller in a centrifugal pump exerts the most force on the shaft:

A) suction
B) discharge
C) balanced force on each side

Question 39

A jet pump is classified as:

A) axial pump
B) dynamic pump
C) positive displacement pump
D) centrifugal pump

Question 40

The effect of temperature on viscosity is generally:

A) viscosity increases as temperature decreases
B) viscosity decreases as temperature decreases
C) viscosity increases as temperature increases
D) viscosity is not affected by temperature