PHEP 2

Question 1

Potential energy is most nearly associated with?

Answer 1

Force

Question 2

The accomplishment of a force acting through a distance is associated with?

Answer 2

Work

Question 3

Energy available for future use is called?

Answer 3

Potential

Question 4

The term “power” means?

Answer 4

Rate at which work is done

Question 5

Falling water contains…

Answer 5

Kinetic energy

Question 6

The acceleration of a freely falling body due to the force of gravity is?

Answer 6

32 ft per second (32 ft/sec^2)

Question 7

A foot-pound is a unit of?

Answer 7

Work

Question 8

In five seconds of fall, a falling body will fall a total of how many feet?

Answer 8

400 distance= 1/2(g t^2)

Question 9

The theoretical velocity of a freely falling body is equal to?

Answer 9

Sq root (2gh)

Question 10

If the velocity of a stream of water is doubled, the weight of a material it can suspend and carry is increased by?

Answer 10

16

Question 11

A pump raises 200 cubic feet of water to a height of 50 feet. How much work was done to raise this water?

Answer 11

624,000 ft-lbs

Question 12

If the water in “A pump raises 200 cubic feet of water to a height of 50 feet. How much work was done to raise this water?” question is raised in five minutes, at what rate in horsepower is the work done?

Answer 12

3- 3/4

Question 13

Niagara Fails is 180 feet high. At the top of the fails each cubic foot of water (weight 62 4 ibs) has how many foot -pounds of potential energy?

Answer 13

9984

Question 14

The transfer of the kinetic energy contained in falling water to mechanical energy at the blades of a hydraulic turbine involves the application of what law?

Answer 14

all three laws

Question 15

Increasing the velocity of falling water will?

Answer 15

Increase the available kinetic energy

Question 16

Disregarding all other losses rate of flow of a liquid is the product of?

Answer 16

Area x velocity

Question 17

If the diameter of a pipe is decreased uniformly at its termination and with no change in pressure head, the exit velocity of the liquid…

Answer 17

Is increased

Question 18

With continuous steady flow, the total head at any point in a stream is equal to the total head at any downstream point plus the…?

Answer 18

loss of head between the two points

Question 19

The sudden transformation within a pipe of the kinetic energy of the moving mass of water into pressure energy is most usually associated with?

Answer 19

water hammer

Question 20

The damaging effects of water hammer can be controlled by?

Answer 20

effective application of all three of the above

Question 21

Compute the approximate friction loss in feet of head for a section of pipe having a diameter of 2 feet, 1000 feet long, roughness coefficient of 0.02 and a mean velocity of 10 ft/sec

Answer 21

15

Question 22

Compute the approximate loss of head in feet due to turbulence for the above pipe, assuming a square edge entry.

Answer 22

3/4

Question 23

The head causing flow through a pipe is the difference between the total head at the beginning of the pipe and the…

Answer 23

total head at the end of the pipe

Question 24

Two reservoirs have surface elevations of 200 and 100 ft. Calculate the approx. flow rate in gals/min through the interconnecting pipe. Assume a square edge entry, clean steel pipe, diameter 1- 1/2 ft, length 600 ft and a coefficient “f” of 0.02.

Answer 24

Between 20,000 and 21,000

Question 25

When applied to a moving liquid mass, the expression (y^2)/2g refers to

Answer 25

velocity head