14 12

Question 1

In most hydroelectric developments, the head and water flow will:

Answer 1

Fluctuate

Question 2

Intake design has a large effect on

Answer 2

All three

Velocity, volume, head

Question 3

A partially clogged trash rack will:

Answer 3

Cause a decrease in the effective head

Question 4

Wood-state pipe would probably not be used for:

Answer 4

Heads above 500 ft

Question 5

An open conduit system implies

Answer 5

The presence of a free surface

Question 6

The most advantageous form of cross-section to use from a hydraulic point of view would be that which would provide:

Answer 6

The smallest wetted perimeter

Question 7

The least efficient type of high-line conduit is that type which:

Answer 7

Has the greatest effect on the available head

Question 8

Steel pipe is probably used more extensively than any other type because:

Answer 8

Of the degree of flexibility it offers in satisfying design criteria in all of the above areas

Question 9

One of the major advantages of using a pressure tunnel in a power conduit system is that:

Answer 9

It permits full use of the available head

Question 10

The simplest means of eliminating positive water-hammer pressure is

Answer 10

Any of the above

Relief valve
Surge tank
Pressure regulator

Question 11

Negative water-hammer pressure is created by:

Answer 11

A sudden increase in the demand for water

Question 12

Which of the below conditions would probably not cause the water level in the riser of a differential surge tank to fall?

Answer 12

A load rejection

Question 13

Pumped storage type of hydroelectric development implies a capability for:

Answer 13

All of the above

Question 14

The best hydraulic rectangular cross-section occurs when (b=bottom width, y=water depth)

Answer 14

Y=B/2

Question 15

Penstock velocities may range from

Answer 15

6 to 20 ft/sec