Unit 5 - Water Distribution

Question 1

Smaller branch lines in a distribution system are referred to as the _________ portion

Answer 1

Distribution

Question 2

To compensate for distribution system pressure loss, these are installed at critical points of elevation

Answer 2

Booster systems

Question 3

Service lines are sized based on the anticipated maximum demands of:
A - The fire department
B - The largest industrial users
C - Neighbouring communities
D - The end user

Answer 3

D - The end user

Question 4

Where does the corporation stop control water flow from

Answer 4

The main water line

Question 5

True or false: asbestos cement pipe is still used in water distribution?

Answer 5

False.

Question 6

When a steel pipe meets a valve or other fitting, what is it jointed by?

Answer 6

A flange

Question 7

What type of pipe is predominantly used in new distribution lines?

Answer 7

Polyvinyl Chloride (PVC)

Question 8

Fire hydrant nozzle configuration is uniform for what reason?

Answer 8

To allow compatibility with firefighting equipment

Question 9

The primary purpose of a fire hydrant is:

A - To fight fires
B - To provide operators access to to distribution systems
C - To flush Mains
D - All of the above

Answer 9

A - To fight fires

Question 10

Flushing is especially important where:

Answer 10

At dead ends in distribution

Question 11

What is the most common type of valve in the distribution system?

Answer 11

Gate Valves

Question 12

True or False
Corporation stops control flow from the main line to the residential line

Answer 12

True

Question 13

A corp stop is designed to be operated during:
A - curb cock installs
B - water meter installs
C - residential service commencement
D - emergency residential repairs

Answer 13

A - Curb cock installs

Question 14

Which valve is installed by the customer at the point where the residential service line enters the house?

Answer 14

Stop and waste valve

Question 15

True or False:
A summer valve-testing program is classified as Corrective Maintenance

Answer 15

False:
It is Preventative Maintenance

Question 16

Removing standing water from hydrants is known as ____________

Answer 16

Purging

Question 17

What’s the intended use of a hydrant flag

Answer 17

Hydrant location (for snow plows and emergency personnel

Question 18

During hydrant flushing, an operator should flush until what point?

Answer 18

Until water appears clear

Question 19

True or False
Chamber checking requires confined space entry policies be followed

Answer 19

True

Question 20

A blueprint with a scale of 1:500 that every one centimetre is equal to _______ at the site

Answer 20

500 centimetres

Question 21

You are handed a map without a North symbol. How can you determine South on the map

Answer 21

South should be at the bottom of the drawing

Question 22

On a typical distribution system blueprint a curb cock is represented by what symbol and/or letters

Answer 22

An X and or the letters CC

Question 23

This type of main failure is usually attributed to improper bedding

Answer 23

Straight break

Question 24

Unchecked corrosion can result in which type of main failure?

Answer 24

Blow out

Question 25

Water hammer:
A - is caused by gradual changes in pressure
B - can be caused by pump failures
C - may cause minor localized pipe damage
D - can result in a “straight break” type of main failure

Answer 25

B - can be cause by pump failures

Question 26

True or false: A main break must be excavated 0.5m on either side of the break if replacement is required

Answer 26

True

Question 27

True or False
Service line failures have a severe effect on the distribution system

Answer 27

False - Service line failures affect one customer

Question 28

What is the usual way to indicate an inoperable fire hydrant

Answer 28

Colour-coded discs