CHAPTER 28 Flashcards
(20 cards)
Theoretically, the maximum lift of a pump at sea level is:
Select one:
A.
10.34 metre (33.9 ft)
B.
20.5 metre (67.2 ft)
C.
5.4 metre (17.7 ft)
D.
9.1 metre (29.8 ft)
E.
15.8 metre (51.8 ft)
A.
10.34 metre (33.9 ft)
Some common rotary pumps included all of the following except:
Select one:
A.
External gear
B.
Sliding vane
C.
Centrifugal
D.
Internal gear
E.
Lobe
C.
Centrifugal
The external gear pump consists of all of the following except a/an:
Select one:
A.
Idler gear
B.
Housing
C.
Impeller
D.
Driving gear
E.
Pockets of liquid
C.
Impeller
Two classifications of pumps are:
Select one:
A.
Rotary and internal gear
B.
Volute and diffuser
C.
Reciprocating and plunger
D.
Dynamic and positive displacement
E.
Rotary and external gear
D.
Dynamic and positive displacement
Centrifugal pumps can be subdivided into the all of the following types except:
Select one:
A.
Regenerative
B.
Diffuser
C.
Gear
D.
Volute
E.
Axial flow
C.
Gear
A pump is a mechanism that is used to _____ by imparting energy to the liquid being transferred.
Select one:
A.
Raise a fluid from a higher level to a lower level
B.
Create a pressure differential only
C.
Develop a static suction pressure
D.
Transfer a fluid from one place to another
E.
Raise a fluid from a lower level to a higher level
D.
Transfer a fluid from one place to another
The sum of static suction lift plus static discharge head is the:
Select one:
A.
Static suction head
B.
Total static head
C.
Static suction lift
D.
Static discharge head
E.
Total head
B.
Total static head
Centrifugal pumps must be placed close to or below the surface of the liquid being pumped because:
Select one:
A.
It makes them less apt to lose their prime
B.
It decreases the chance of “surging”
C.
It makes them easier to prime
D.
They have a low discharge pressure
E.
Of their inability to produce suction lift
E.
Of their inability to produce suction lift
The distance, measured vertically, that the intake of the pump is placed above the surface of the water is referred to as:
Select one:
A.
Static discharge head
B.
Static suction lift
C.
Total head
D.
Total static head
E.
Static suction head
B.
Static suction lift
Lobe pumps are similar in theory to _____ pumps.
Select one:
A.
Gear
B.
Reciprocating
C.
Plunger
D.
Volute
E.
Dynamic
A.
Gear
The area of the centrifugal pump where the velocity of the liquid discharged from the impeller is lowered and converted to pressure is an area of increasing cross-sectional area called the:
Select one:
A.
Wear ring
B.
Impeller
C.
Volute
D.
Diffuser
E.
Eye
C.
Volute
A sliding vane pump fits into the category:
Select one:
A.
Positive displacement gear
B.
Positive displacement lobe
C.
Positive displacement rotary
D.
Dynamic mixed flow
E.
Dynamic centrifugal volute
C.
Positive displacement rotary
Reciprocating pumps are used for _____ applications.
Select one:
A.
High volume, Low-temperature
B.
Low volume, Low-pressure
C.
Low volume, high-temperature
D.
Low volume, high-pressure
E.
High volume, high-pressure
D.
Low volume, high-pressure
The distance required to move the water from the source of supply to the point of discharge is referred to as:
Select one:
A.
Static suction head
B.
Static discharge head
C.
Total static head
D.
Total head
E.
Static suction lift
D.
Total head
The distance from the free surface of the supply tank to the centre line of the pump is referred to as:
Select one:
A.
Static discharge head
B.
Static suction head
C.
Total static head
D.
Total head
E.
Static suction lift
B.
Static suction head
The vertical distance from the surface of the source of supply to the surface of the water in the discharge tank is referred to as:
Select one:
A.
Static discharge head
B.
Static suction head
C.
Total static head
D.
Total head
E.
Static suction lift
A.
Static discharge head
The sum of static head and dynamic head is the:
Select one:
A.
Static suction lift
B.
Total head
C.
Total static head
D.
Static suction head
E.
Static discharge head
B.
Total head
The sliding vane pump consists of all of the following except:
Select one:
A.
Sliding vanes
B.
An eccentric casing
C.
An impeller
D.
A rotor
E.
A rotor
C.
An impeller
A device used in a centrifugal pump to make the conversion from velocity to pressure more effective is the:
Select one:
A.
Volute
B.
Impeller
C.
Eye
D.
Wear ring
E.
Diffuser
E.
Diffuser
The vertical distance, in metres or in feet, from the centre line of the pump to the free surface of the water in the discharge tank is referred to as:
Select one:
A.
Static suction lift
B.
Total static head
C.
Total head
D.
Static discharge head
E.
Static suction head
D.
Static discharge head
