Types of Plumbing Systems: A Comprehensive Guide for Carpenters

Question 1

In residential construction, which of these is NOT a common type of plumbing system?

Accepted Answer

Solar thermal system

Answer

Gravity-fed system

Answer

Pressurized system

Question 2

What plumbing system is used to distribute water throughout a building?

Accepted Answer

Water supply system

Answer

Drainage system

Answer

Gas distribution system

Answer

Ventilation system

Question 3

What is the main purpose of a P-trap in a plumbing system?

Accepted Answer

To prevent sewage gases from entering the building

Answer

To regulate water flow

Answer

To collect water for reuse

Answer

To dispose of solid waste

Question 4

When installing a plumbing drainage system, which three factors should be considered?

Accepted Answer

Pipe diameter, slope of pipes, venting requirements

Answer

Pipe material, fixture type, water pressure

Answer

Pipe length, number of fixtures, drainage rate

Answer

Pipe insulation, flow rate, backflow prevention

Question 5

What is the primary function of a backflow preventer in a plumbing system?

Accepted Answer

To prevent water from flowing back into the water source

Answer

To regulate water pressure

Answer

To filter out impurities

Answer

To provide a means of drainage

Question 6

Which of the following is NOT a common type of fixture used in drainage systems?

Accepted Answer

Water heaters

Answer

Sinks

Answer

Toilets

Answer

Dishwashers

Question 7

What is the purpose of a ball valve in a plumbing system?

Accepted Answer

To control the flow of water

Answer

To regulate water pressure

Answer

To release air from the system

Answer

To prevent backflow

Question 8

In residential plumbing systems, which material is frequently used for drainpipes?

Accepted Answer

Polyvinyl chloride (PVC)

Answer

Copper

Answer

Cast iron

Answer

Steel

Question 9

What is the primary purpose of a trap in a plumbing system?

Accepted Answer

To prevent sewer gases from entering the home

Answer

To prevent water from flowing back into the bathtub

Answer

To filter impurities from the water

Answer

To regulate water flow

Question 10

What is the fundamental difference between a water supply pipe and a drainpipe?

Accepted Answer

Water supply pipes convey water away from fixtures

Answer

Drainpipes carry water to fixtures

Answer

Water supply pipes are larger in diameter than drainpipes

Answer

Drainpipes are constructed from different materials than water supply pipes

Question 11

What is the main function of a pressure-reducing valve in a plumbing system?

Accepted Answer

To decrease water pressure

Answer

To increase water pressure

Answer

To regulate water flow

Answer

To prevent water leaks

Question 12

In plumbing systems, what is the primary purpose of a cleanout?

Accepted Answer

To provide access for maintenance and cleaning

Answer

To prevent blockages

Answer

To regulate water flow

Answer

To reduce water pressure

Question 13

What is the function of a water hammer arrestor in a plumbing system?

Accepted Answer

To prevent water pressure surges

Answer

To reduce noise in the plumbing system

Answer

To regulate water flow

Answer

To prevent leaks

Question 14

Which type of pipe is most commonly used for potable water supply lines due to its durability and resistance to corrosion?

Accepted Answer

Copper

Answer

Cast iron

Answer

PVC

Answer

ABS

Question 15

Which type of pipe is typically used for underground drainage applications due to its strength and resistance to corrosion?

Accepted Answer

Cast iron

Answer

CPVC

Answer

PEX

Answer

Galvanized steel

Question 16

What is the primary purpose of a ball valve in plumbing systems?

Accepted Answer

To control the flow of water

Answer

To prevent backflow

Answer

To adjust water temperature

Answer

To release air from pipes

Question 17

What is the main purpose of a backflow preventer in plumbing?

Accepted Answer

To prevent contamination of the potable water supply

Answer

To increase water pressure

Answer

To reduce noise in pipes

Answer

To improve drainage

Question 18

What is the primary function of a trap in plumbing systems?

Accepted Answer

To prevent sewer gases from entering the building

Answer

To store water for future use

Answer

To regulate water flow

Answer

To collect debris

Question 19

Which piping material possesses exceptional resistance to corrosion and is widely employed in water supply systems for its durability?

Accepted Answer

Copper

Answer

Polyvinyl chloride (PVC)

Answer

Galvanized steel

Answer

Cast iron

Question 20

What is the primary purpose of a P-trap within a plumbing system?

Accepted Answer

To impede the influx of sewer gases

Answer

To trap and eliminate debris

Answer

To control water flow rate

Answer

To stabilize water pressure

Question 21

In large-scale commercial buildings, which plumbing system configuration typically incorporates vertical stacks and horizontal branches?

Accepted Answer

Stacked system

Answer

Direct waste system

Answer

Single-stack system

Answer

Dual-stack system

Question 22

What is the primary function of a pressure-reducing valve within a plumbing system?

Accepted Answer

To reduce water pressure

Answer

To elevate water pressure

Answer

To regulate water temperature

Answer

To prevent water leaks

Question 23

Which type of piping connection is specifically designed to join two pipes of equal diameter?

Accepted Answer

Coupling

Answer

Union

Answer

Tee

Answer

Elbow

Question 24

In plumbing systems, which type of trap is designed to minimize clogging and is commonly used in kitchen sinks?

Accepted Answer

P-trap

Answer

S-trap

Answer

J-trap

Answer

V-trap

Question 25

What is the primary purpose of a cleanout in a plumbing system?

Accepted Answer

To provide access for cleaning and maintenance

Answer

To regulate water flow

Answer

To prevent water leaks

Answer

To connect multiple drains

Question 26

What is the main purpose of a drainage system in plumbing?

Accepted Answer

To remove wastewater and waste solids

Answer

To supply water to fixtures

Answer

To circulate air for ventilation

Answer

To prevent backflow of wastewater

Question 27

When working with gas distribution lines, which safety measure is crucial to prevent potential risks?

Accepted Answer

Conducting regular inspections for leaks and corrosion in gas lines

Answer

Using flexible tubing for all gas connections

Answer

Placing smoke detectors near gas appliances

Answer

Leaving gas connections open when not in use

Question 28

For underground drainage systems, which plumbing material is ideal due to its durability and corrosion resistance?

Accepted Answer

Cast Iron

Answer

Copper

Answer

Polyvinyl Chloride (PVC)

Answer

Polyethylene Cross-linked (PEX)

Question 29

Which components are essential to a typical gas distribution system in plumbing?

Accepted Answer

Fuel gas piping, regulator, and vents

Answer

Valves, pumps, and storage tanks

Answer

Drains, traps, and fixtures

Question 30

How does a pressure-reducing valve help a plumbing system?

Accepted Answer

It keeps water pressure at a safe level.

Answer

It increases water pressure.

Answer

It stops leaks and bursts.

Answer

It reduces noise in the pipes.

Question 31

Which plumbing material exhibits exceptional durability and corrosion resistance?

Accepted Answer

Copper

Answer

PVC

Answer

PEX

Answer

Galvanized Steel

Question 32

What is the primary purpose of a P-trap in a plumbing system?

Accepted Answer

Prevent backflow of sewer gases

Answer

Regulate water pressure

Answer

Filter impurities from water

Answer

Connect multiple fixtures to a single drain line

Question 33

Which plumbing system configuration is commonly used in commercial buildings with multiple floors?

Accepted Answer

Stack System

Answer

Vent System

Answer

Direct System

Answer

Loop System

Question 34

What is the intended purpose of a cleanout plug in a plumbing system?

Accepted Answer

Provide access for maintenance and cleaning

Answer

Prevent clogs

Answer

Regulate water flow

Answer

Connect pipes of varying diameters

Question 35

Which piping material is most suitable for hot water supply lines?

Accepted Answer

Copper

Answer

PVC

Answer

Galvanized Steel

Answer

PEX

Question 36

According to plumbing code requirements, what is the minimum permissible diameter for a drain pipe serving a kitchen sink?

Accepted Answer

2 inches

Answer

1-1/2 inches

Answer

2-1/2 inches

Answer

3 inches

Question 37

What is the primary function of a water hammer arrestor in a plumbing system?

Accepted Answer

Reduce pressure surges in water lines

Answer

Prevent fixture overflow

Answer

Regulate water temperature

Answer

Filter impurities from water

Question 38

Which type of valve is primarily used to control water flow in a plumbing system?

Accepted Answer

Ball valve

Answer

Gate valve

Answer

Check valve

Answer

Relief valve

Question 39

What is the main purpose of a vent pipe in a plumbing system?

Accepted Answer

Provide an escape route for sewer gases

Answer

Increase water pressure

Answer

Drain excess water

Answer

Connect multiple fixtures to a single water supply line

Question 40

Identify the plumbing system that utilizes piping made of flexible cross-linked polyethylene:

Accepted Answer

PEX

Answer

ABS

Answer

CPVC

Answer

PVC

Question 41

Identify the plumbing system characterized by its black color and primary use in drain lines:

Accepted Answer

ABS

Answer

PVC

Answer

PEX

Answer

CPVC

Question 42

Identify the plumbing system commonly used for water supply lines due to its flexibility and ease of installation:

Accepted Answer

PEX

Answer

Copper

Answer

ABS

Answer

Cast Iron

Question 43

Which plumbing system employs a push-fit connection method, enabling quick and easy installation?

Accepted Answer

PEX

Answer

Galvanized Steel

Answer

Copper

Question 44

Identify the plumbing system known for its high strength and corrosion resistance, although requiring specialized tools and skills for installation:

Accepted Answer

Copper

Answer

PEX

Answer

CPVC

Question 45

Identify the plumbing system that combines pipes and fittings made from various materials, allowing for customization and flexibility:

Accepted Answer

Hybrid Plumbing System

Answer

Type B

Answer

Type M

Question 46

Which type of plumbing system is best suited for high-pressure environments, like commercial kitchens, due to its strength and resistance to high temperatures?

Accepted Answer

Copper

Answer

ABS

Answer

PEX

Answer

PVC

Question 47

Which plumbing system is commonly used for underground drainage due to its durability and resistance to root penetration and corrosion?

Accepted Answer

Cast Iron

Answer

Copper

Answer

PVC

Answer

PEX

Question 48

What is the primary difference between a vented and unvented plumbing system?

Accepted Answer

Vented systems allow gases to escape through a vent pipe, while unvented systems rely on a pressure-relief valve.

Answer

Unvented systems require a pump to circulate water.

Answer

Vented systems use larger diameter pipes than unvented systems.

Question 49

What is the main purpose of a trap in a plumbing system?

Accepted Answer

To prevent sewer gases from entering the building by creating a water seal.

Answer

To filter out debris from the water

Answer

To regulate water pressure

Answer

To provide a vent for the system

Question 50

What is the purpose of a pressure-reducing valve in a plumbing system?

Accepted Answer

To reduce high water pressure to a safe level for fixtures and appliances, preventing damage.

Answer

To regulate water flow rate

Answer

To increase water pressure for fixtures and appliances

Question 51

What is the best practice for maintaining a plumbing system?

Accepted Answer

Regular inspections, timely repairs, and addressing minor leaks and clogs promptly.

Answer

Ignoring minor leaks and clogs

Answer

Using chemical cleaners frequently

Answer

Replacing plumbing fixtures every few years