Chapters 4-6

Question 0

A centrifugal pump is an example of a ____ pump. A. positive displacement B. centrifugal C. rotary D. machine

Answer 0

B. centrifugal

Question 1

The percentage of fluid that leaks passed the internal clearance of a pump is called _____.

Answer 1

slip

Question 2

A positive displacement pump is designed with ________. A. little or no slip B. a lot of slip C. no moving parts

Answer 2

A. little or no slip

Question 4

Impeller design can be: A. Open B. Closed C. Semi-open D. All of the above

Answer 4

D. All of the above

Question 4

Pump cavitation may occur if not enough NPSH. What is NPSH?

Answer 4

Net Positive Suction Head

Question 5

In a multi-stage centrifugal pump, the _____ of one becomes the _____ of the next. A. suction - discharge B. slip - NPSH C. discharge - suction D. impeller - suction

Answer 5

C. discharge - suction

Question 6

Do pumps move liquids or compress gases?

Answer 6

move liquids

Question 7

A screw pump: A. has tight clearance with little or no slip B. is a centrifugal pump C. is a dynamic pump D. has plenty of clearance for extra slip

Answer 7

A. has tight clearance with little or no slip

Question 8

The density of a liquid relative to the density of water is: A. specific gravity B. molecular density C. NPSH D. molecular gravity

Answer 8

A. specific gravity

Question 9

Reciprocating pumps include:

Answer 9

All of the above

Question 10

Flow rate of a PD pump depends on: A. the suction rate B. if the flow is laminar or tubulent C. the cavity volume and RPM (how fast its turning) D. none of the above

Answer 10

C. the cavity volume and RPM (how fast its turning)

Question 12

What is the most efficient type of turbine? A. Jet B. Steam C. Condensing D. Wind

Answer 12

C. Condensing

Question 13

Answer 13