Question Bank

Plumbing Test 1

Give 2 reasons when downfeed systems are used?

1. Building height gets too high.

2. Existing pressure is not great enough.

Water pressure in most public systems is delivered at?

50 psi (345 kPa)

Name 6 parts of a typical water supply system?

1. Building Main

2. Riser

3. Horizontal Fixture Branch

4. Fixture Connection

5. Meter

6. Backflow Prevention

Of all the different types of plastic pipe available for supply piping which 2 can only supply cold water?

1. PE (polyethylene)

2. PVC (polyvinyl chloride)

What are the 2 main components of a septic system?

1. Septic tank

2. Disposal field

Drainage systems can be broken into 3 types of systems, what are they?

1. Sanitary systems

2. Storm water drainage

3. Site drainage

What are the 2 systems that make up a sanitary system?

1. Drainage system

2. Vent system

Name the 4 properties that water supply systems must provide?

1. Correct quantity

2. Proper flow rates

3. Proper pressure

4. Proper temperature (for use)

Name the 3 different devices in which to provide hot water to a building?

1. Storage

2. Instantaneous (tankless)

3. Boiler

What do you call water that is free of bacteria and acceptable for human consumption?

Potable water

What are 2 dangers associated with plumbing?

1. Explosive potential of gas

2. Explosive potential of hot water systems and pressurized cold water systems

What are the 5 different types of plumbing systems?

1. Water Supply

2. Drainage

3. Plumbing Fixtures

4. Storm Water

5. Building Equipment Provisions

What are the 3 ways in which to reduce noise in water supply systems?

1. Shocks

2. Air chambers

3. Pipe Insulation

What are the 3 types of copper used for water supply systems?

1. Type K (thickest wall)

2. Type L

3. Type M (thinnest wall)

What is another name for a toilet, and 2 methods of mounting a toilet?

• Water Closet

1. Floor Mounted

2. Wall Mounted (wall hung)

What are two traditional fire extinguishing systems?

1. Standpipe Systems

2. Sprinkler Systems

What are the three different classes of sprinkler systems?

1. Light Hazard

2. Ordinary Hazard

3. Extra Hazard

Name the three components that must be present in order for a fire to occur?

1. Oxygen

2. Fuel

3. Heat

What five products can be used to correct cross connection?

1. Air gap

2. Atmospheric vacuum breaker

3. Pressure vacuum breaker

4. Double check valve assembly

5. Reduced pressure backflow preventer

Why do most deaths occur in smaller building then in large commercial buildings?

• More attention is given to fire prevention in, large commercial, institutional, industrial (CII) buildings.

• High-rises are especially focused on due to the potential for multiple deaths or injuries.

The device that will protect a backflow preventer from fouling due to foreign matter and debris which may be flowing through the line is called?

Strainer

How many classes of standpipe systems are there and who uses which?

1. Class I: Fire department personnel

2. Class II: Building occupants and fire department personnel

3. Class III: Building occupants and fire department personnel

What is a toxic and non toxic substance?

• Toxic substance: Any Liquid, solid, or gas that has a potential to create a health hazard.

• Non-toxic substance: Any substance that doesn't create a health hazard. Can be a nuisance or aesthetically objectionable. (Ex. Food items like sugar, soda pop, etc.)

List four types of Sprinkler heads:

1. Upright head

2. Pendant head

3. Sidewall head

4. Concealed head

What are the four basic types of automatic water sprinkler systems?

1. Wet Pipe System

2. Dry Pipe System

3. Pre-action System

4. Deluge System

Name four specialty fire protection systems?

1. Water fog systems

2. Liquid foam systems

3. Carbon dioxide systems

4. Dry chemical systems

What is the main difference between the Pre-action system and the Deluge system?

• Pre-action system: the sprinkler heads are normally closed.

• Deluge system: the sprinkler heads are normally open.

What is the main purpose of the Deluge system?

Deliver the most water in the least amount of time.