ch 12 b

Question 1

T or F
a base load plant is a plant without pondage and where the full plant discharge is the same as the flow of the river

Answer 1

false

Question 2

the head is obtained by subtracting the head loss from the conveyance of the water to the turbine by conduit through the turbine and back to the river subtracted from the gross head is called

Answer 2

effective head

Question 3

small ice needles which form at the bottom of fairly quiet shallow bodies of open water are called

Answer 3

anchor ice

Question 4

open conduits constructed in natural ground are called

Answer 4

canals

Question 5

with a higher velocity the cross section of a conduit or conductor can be ___ for a given quantity of flow

Answer 5

smaller

Question 6

an alternative to lining a canal for protection against erosion is to

Answer 6

increase the cross section of the canal

Question 7

the minimum velocity of water in a power canal to prevent the deposit of silt is

Answer 7

2 to 3 ft/sec

Question 8

___ are used to prevent excess rise of water at any point in a hydraulic development

Answer 8

spillways

Question 9

the conduit between the turbines and the surge tank is called the

Answer 9

pentstock

Question 10

T or F
a riveted pipe produces a lower hydraulic loss than a fabricated welded pipe

Answer 10

false

Question 11

to prevent negative pressures in a penstock where pipe is being used what is installed in the pipeline

Answer 11

air vents

Question 12

a surge tank is normally designed to accommodate how much of the water load rejected by the turbines

Answer 12

all of the load rejected

Question 13

what type of turbine has variable vane design and can be used for both pumping and generating

Answer 13

deriaz

Question 14

Two types of surge tanks

Answer 14

simple ; differential

Question 15

what is meant by the term wetted perimeter

Answer 15

surface area that is in contact with the water