Question 1

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

Accepted Answer

A)   one
B)   two
C)   three
D)   b and cE) B) and D)
F) B) and C)

Question 2

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

Accepted Answer

A)   vertical or horizontal
B)   single stage or multi-stage
C)   rotary
D)   axialE) A) and B)
F) A) and C)

Question 3

Acceleration head is defined as:

Accepted Answer

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.F) D) and E)
G) B) and D)

Question 4

The first true centrifugal pump was not invented until:

Accepted Answer

A)   1600
B)   1851
C)   200BC
D)   100ADE) None of the above
F) B) and C)

Question 5

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

Accepted Answer

A)   sucked
B)   pushedC) A) and B)
D) undefined

Question 6

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

Accepted Answer

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

Question 7

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

Accepted Answer

A)   inlet vane tip
B)   open
C)   closed
D)   semi-openE) A) and B)
F) None of the above

Question 8

The two most common classifications for pumps are:

Accepted Answer

A)   centrifugal and positive displacement
B)   rotary and reciprocating
C)   positive displacement and dynamic
D)   axial and centrifugalE) B) and C)
F) All of the above

Question 9

Cavitation occurs when:

Accepted Answer

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

Question 10

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

Accepted Answer

A)   suction
B)   discharge
C)   balanced force on each sideD) All of the above
E) None of the above

Question 11

Internal slip is defined as:

Accepted Answer

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 & cE) A) and B)
F) A) and C)

Question 12

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.

Accepted Answer

A)   labyrinth seal
B)   radial bearing
C)   packing gland and packing
D)   mechanical sealE) B) and C)
F) All of the above

Question 13

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

Accepted Answer

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

Question 14

Multistage centrifugal pumps include two or more:

Accepted Answer

A)   discharge chambers
B)   power gears
C)   impellers
D)   suction chambersE) C) and D)
F) B) and D)

Question 15

Positive displacement pumps come in ________ basic designs.

Accepted Answer

A)   one
B)   two
C)   three
D)   fourE) None of the above
F) B) and D)

Question 16

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

Accepted Answer

A)   volute
B)   impeller
C)   piston
D)   suction eyeE) B) and D)
F) C) and D)

Question 17

A pulsation dampener is designed to:

Accepted Answer

A)   absorb cyclical flow variations
B)   sends a cancellation pulse into a PD pump
C)   provides storage for excess flow
D)   electrical pulse converterE) B) and C)
F) All of the above

Question 18

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

Accepted Answer

A)   counter-clockwise
B)   clockwiseC) A) and B)
D) undefined

Question 19

A pump curve identifies:

Accepted Answer

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 comparisonsE) All of the above
F) A) and B)

Question 20

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

Accepted Answer

A)   volute
B)   outer casing
C)   suction eye
D)   impellers
E)   wear ringsF)  lobesG)  motorH)  shaftI)  shaft couplingJ)  dischargeK)  pistonL)  internal gearM)  shaft bearingsN)  shaft sealsO) G) and N)
P) B) and N)

Exam 4: Pumps

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

Correct AnswerverifiedShow Answer

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

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

Correct AnswerverifiedShow Answer

Positive displacement pumps come in ________ basic designs.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

A pulsation dampener is designed to:

Correct AnswerverifiedShow Answer

The two most common classifications for pumps are:

Correct AnswerverifiedShow Answer

A pump curve identifies:

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Cavitation occurs when:

Correct AnswerverifiedShow Answer

The first true centrifugal pump was not invented until:

Correct AnswerverifiedShow Answer

Internal slip is defined as:

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Multistage centrifugal pumps include two or more:

Correct AnswerverifiedShow Answer

Acceleration head is defined as:

Correct AnswerverifiedShow Answer

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