Plumbing Fundamentals

Question 0

Essentially, a plumbing system is composed of a network of (blank), (blank), and (blank)that carry and control flow of supply water and waste water to and from points of use known as (fixtures).

Answer 0

Pipes, fittings, valves, fixtures

Question 1

Specific weight, or density, of water is its weight per unit (blank)

Answer 1

Volume

Question 2

Water is most dense at what temperature?

Answer 2

39 degrees Fahrenheit

Question 3

Below 39 degrees F, water becomes more or less dense? It’s volume increases or decreases?

Answer 3

Less. Increases.

Question 4

Above and below 39 degrees F, water is more or less dense?

Answer 4

Less

Question 5

The (blank) of a fluid or solid is the ratio of the specific weight of the fluid or solid to the specific weight of water at a temperature of 39 degrees F.

Answer 5

Specific gravity (s.g.)

Question 6

Materials with a specific gravity of less than 1 are (more/less) dense than water

Answer 6

Less

Question 7

A gallon is approximately how many liters?

Answer 7

3.8. Liters

Question 8

Volumetric flo rate, or flow rate, is the (blank) of a substance that passes a point in a system per unit of (blank)

Answer 8

Volume. Time.

Question 9

Pressure (p) is the (blank) per unit (blank) exerted by liquid or gas on a surface such as the sidewall of a container or pipe.

Answer 9

Force. Area.

Question 10

Standard atmospheric pressure is the typical barometric pressure of air at (blank) and (blank) degrees F.

Answer 10

Sea level. 70 degrees F.

Question 11

Guage pressure (Pg) is the pressure of a fluid (gas or liquid) excluding pressure exerted by the (blank).

Answer 11

Atmosphere

Question 12

Saturation vapor pressure is the pressure that (blank) molecules exert when the air is fully saturated at a given (blank).

Answer 12

Water. Temperature.

Question 13

On plumbing systems there are 3 additional types of pressure.

Answer 13

Static pressure. Residual pressure. Discharge pressure.

Question 14

Static pressure is the pressure that exists without any (blank).

Answer 14

Flow

Question 15

Residual pressure is the pressure available at a (blank) during a period of (blank).

Answer 15

Fixture or outlet. Maximum demand.

Question 16

Discharge pressure is the pressure of the water at the (blank), such as at the mouth of a shower head, faucet, or hose bib.

Answer 16

Point of discharge.

Question 17

Water vapor pressure is the pressure that the (blank) alone exert in air.

Answer 17

Water vapor molecules.

Question 18

Type K copper tubing is primarily used for what?

Answer 18

Underground water service.

Question 19

Type M copper tubing is primarily used for what?

Answer 19

Branch supplies where pressure is not too great.

Question 20

Type DWV tubing is primarily used for what?

Answer 20

Non pressure applications

Question 21

Steel pipe is most commonly used for what?

Answer 21

Natural gas supply lines

Sprinkler systems

Question 22

Lightweight wrought iron pipe is the most common pipe used in what application?

Answer 22

Water supply and fire sprinkler systems

Question 23

Cast iron pipe is most commonly used for what?

Answer 23

Gravity building and storm drain/sewer systems.