Deck 11: Pumps and Compressors

Question 1

Which pump offers the best pressure rating?

A) centrifugal pump
C) piston pump
B) vane pump
D) gear pump

Answer 1

C

Question 2

The ____ of a pump is the rate at which the hydraulic fluid is supplied to a system from the pump in a specified amount of time.

A) delivery
C) operating pressure
B) flow
D) actual displacement

Answer 2

A

Question 3

How much fluid a pump can move in one revolution is referred to as ____.

A) metric flow
C) flow
B) displacement
D) set point

Answer 3

B

Question 4

"Pressure set up in a confined body of fluid acts equally in all directions and always at right angles to the containing surfaces." What is the name of this law?

A) Pascal's law
C) Boyle's law
B) Charles' law
D) Lenze's law

Question 5

____ is the size of an object that uses all three dimensions: height, width, and depth.

A) Volume
C) Mass
B) Area
D) Density

Question 6

A ____ is used to move a liquid or a gas in large volumes that would not be possible when using atmospheric pressure alone.

A) compressor
C) pneumatic system
B) hydraulic system
D) pump

Question 7

The flow volume of a pump is rated in gallons per minute (gpm).

Question 8

What does Charles' Law state?

Question 9

"At constant temperature, the absolute pressure of a gas is inversely proportional to its volume." What is the name of this law?

A) Pascal's law
C) Boyle's law
B) Charles' law
D) Lenze's law

Question 10

The ____ of a pump can be found by dividing the theoretical displacement (manufacturer's rating) into the actual displacement.

A) flow rate
C) operating pressure
B) capacity
D) volumetric efficiency

Question 11

There are generally three types of positive displacement pumps that are in use today: the vane pump, the ____ pump, and the piston pump.

A) centrifugal
C) gear
B) impeller
D) radial axis

Question 12

Many things can go wrong with an air compressor, one of which is the same problem that may be encountered with hydraulic pumps. This is ____.

A) entrained air
C) worn cylinder walls
B) bearing failure
D) vane wear

Question 13

Unloading occurs in what type of system?

A) hydraulic
C) pneumatic
B) mechanical
D) ventilation

Question 14

There are two pumps that are not considered to be positive displacement pumps. One is the centrifugal pump and the other is the ____ pump.

A) lobe
C) impeller
B) bent-axis
D) internal gear

Question 15

____ are used to pressurize air to levels that are above atmospheric pressure.

A) Compressors
C) Pneumatic systems
B) Hydraulic systems
D) Pumps

Question 16

A ____ is a mechanical device that changes mechanical power into fluid power.

A) compressor
C) piston
B) motor
D) pump