Drainage Systems Design and Installation: Master the Basics

Question 1

Which factor is not a primary consideration when choosing pipe materials for drainage systems?

Accepted Answer

Appearance

Answer

Durability

Answer

Corrosion resistance

Answer

Compatibility with wastewater

Question 2

Which of the following is not a benefit of using PVC pipes for drainage systems?

Accepted Answer

High temperature tolerance

Answer

Lightweight and easy to install

Answer

Corrosion-resistant

Answer

Low cost

Question 3

Which of the following tools is commonly used to measure the slope of drainage pipes?

Accepted Answer

Clinometer

Answer

Level

Answer

Transit

Answer

Theodolite

Question 4

Which of the following factors is not relevant when selecting pipe material for a drainage system?

Accepted Answer

Insulation capabilities

Answer

Durability

Answer

Corrosion resistance

Answer

Cost

Question 5

Which type of trap is commonly used in plumbing fixtures?

Accepted Answer

P-trap

Answer

S-trap

Answer

U-trap

Answer

J-trap

Question 6

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

Accepted Answer

Provide access for cleaning and maintenance

Answer

Prevent clogs

Answer

Reduce water pressure

Answer

Trap odors

Question 7

What is the recommended method for connecting PVC drainage pipes?

Accepted Answer

Solvent welding

Answer

Threaded joints

Answer

Compression fittings

Answer

Mechanical gaskets

Question 8

What is an advantage of using flexible drainage pipes?

Accepted Answer

Ease of installation around corners

Answer

Reduced noise

Answer

Higher flow capacity

Answer

Durability

Question 9

Which type of drainage system is specifically designed to remove wastewater from fixtures like sinks, toilets, and showers?

Accepted Answer

Sanitary Drainage System

Answer

Storm Drainage System

Answer

Combination Drainage System

Answer

French Drain System

Question 10

How does decreasing the slope of a drainage pipe affect the hydraulic gradient and water flow?

Accepted Answer

Decreases hydraulic gradient, decreases water flow

Answer

Increases hydraulic gradient, increases water flow

Answer

No change in hydraulic gradient, no change in water flow

Question 11

When selecting the most suitable pipe material for a sanitary drainage system, which factor should be prioritized?

Accepted Answer

Chemical resistance

Answer

Mechanical strength

Answer

Thermal conductivity

Answer

Fire resistance

Question 12

Which of the following materials is primarily used for underground drainage pipes due to its resistance to corrosion and ease of installation?

Accepted Answer

PVC

Answer

ABS

Answer

Galvanized steel

Answer

Copper

Question 13

When determining the appropriate pipe size for a drainage system, which factor is critical to consider to ensure proper flow and prevent blockages?

Accepted Answer

Flow rate

Answer

Soil conditions

Answer

Pipe material

Answer

Pipe length

Question 14

Which component in a drainage system serves the purpose of providing access for cleaning and maintenance to remove blockages or debris?

Accepted Answer

Cleanout

Answer

P-trap

Answer

Backwater valve

Answer

Reducer

Question 15

In drainage systems, which fitting is commonly used to change the direction of a drain line by 90 degrees?

Accepted Answer

Elbow

Answer

Reducer

Answer

Tee

Answer

Coupling

Question 16

When installing a drainage system, which practice is essential to avoid potential issues and ensure efficient flow?

Accepted Answer

Avoiding sharp bends and maintaining gradual curves

Answer

Using flexible pipes throughout the system

Answer

Using as few fittings as possible, even if it compromises the system's functionality

Answer

Installing pipes horizontally without any slope

Question 17

Which component in a drainage system plays a crucial role in preventing sewage backup into the building, especially during heavy rainfall or flooding?

Accepted Answer

Backwater valve

Answer

P-trap

Answer

Elbow

Answer

Cleanout

Question 18

In a drainage system, what is the primary purpose of a P-trap?

Accepted Answer

To create a water seal that acts as a barrier, preventing sewer gases from entering the building

Answer

To collect and release excess water

Answer

To filter out solid waste from the wastewater

Question 19

Which type of pipe material is commonly used for drainage pipes in residential buildings?

Accepted Answer

Polyvinyl Chloride (PVC)

Answer

Cast iron

Answer

Galvanized steel

Answer

Copper

Question 20

Which of the following is NOT a type of drainage fixture?

Accepted Answer

Window

Answer

Sink

Answer

Floor drain

Answer

Toilet

Question 21

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

Accepted Answer

To prevent sewer gases from entering the building

Answer

To connect different pipes

Answer

To collect and discharge waste

Answer

To regulate water flow

Question 22

What is the purpose of a cleanout in a drainage system?

Accepted Answer

To provide access for cleaning and maintenance

Answer

To regulate pressure

Answer

To prevent overflows

Answer

To collect sediment

Question 23

What is the proper method for disposing of waste from a construction site?

Accepted Answer

In a designated waste container

Answer

In the dumpster of a nearby business

Answer

On the ground

Answer

In a nearby stream or river