WEEK 2 QUIZ

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Questions and Answers

What is the primary function of a nipple in plumbing fittings?

To connect two fittings (correct)

To connect two pipes of different sizes

To shut off the water supply

To reduce water flow

Which type of fitting is characterized by having one plain end and one threaded end?

Wye

Coupling

Adaptor (correct)

Reducer

What distinguishes a union from a coupling?

A union has male threads only

A union is used for PVC pipes only

A coupling is used for larger pipes

A union can be removed, while a coupling cannot (correct)

What is the main disadvantage of a gate valve?

It is prone to wear and tear Signup and view all the answers

Which fitting is typically used in sanitary and waste piping systems?

Wye Signup and view all the answers

What is a characteristic feature of a globe valve?

It has a ring seat for throttling the flow Signup and view all the answers

What is the function of an angle valve?

To control the flow of fluids Signup and view all the answers

What are stainless steel pipes primarily used for?

Carrying substances like natural gas, oil, steam, and water Signup and view all the answers

What does a reducer do in a piping system?

Changes the flow rate by connecting different sized pipes Signup and view all the answers

What is a significant benefit of using plastic pipes in plumbing?

High resistance to rust and corrosion Signup and view all the answers

Which of the following is NOT a type of plastic or synthetic pipe?

Copper Signup and view all the answers

What shape does a 'tee' fitting resemble?

T-shaped Signup and view all the answers

What is a characteristic feature of elbows in piping?

Connect pipe at various angle degrees Signup and view all the answers

Which type of fitting is commonly used in fire sprinkler systems?

Cross-type Signup and view all the answers

What is a key property of PVC pipes compared to metal pipes?

Resistance to rust and corrosion Signup and view all the answers

What is the purpose of pipe fittings in plumbing?

To connect pipes and alter flow direction Signup and view all the answers

Which material is not suitable for contact with hot substances?

Vitrified Clay Pipe Signup and view all the answers

What is a significant disadvantage of Vitrified Clay Pipe?

It is brittle and needs stable placement Signup and view all the answers

Lead Pipe is prohibited for use in what type of water systems?

Potable and non-potable water systems Signup and view all the answers

Which type of pipe is known to corrode easily in alkaline and acidic water?

Galvanized Steel Pipe Signup and view all the answers

Which pipe is better in quality compared to Galvanized Steel Pipe?

Galvanized Wrought Iron Pipe Signup and view all the answers

What defines the common application of Copper Pipe?

Heating systems Signup and view all the answers

Which type of Copper Pipe is the lightest and thinnest?

Type M Signup and view all the answers

What percentage of zinc is typically found in Brass Pipe?

15 percent Signup and view all the answers

What is the primary function of a float valve in plumbing?

To monitor and regulate water levels Signup and view all the answers

Which type of plumbing fixture is designed to receive liquid waste from males only?

Urinal Signup and view all the answers

What type of lavatory shape is NOT commonly mentioned?

Circular Signup and view all the answers

How does a flush valve function in plumbing systems?

Supplies water to flush toilets and urinals Signup and view all the answers

Bathtubs are typically designed for which specific purpose?

Soaking the whole body Signup and view all the answers

What is an example of a modernized water closet?

Sensor water closet Signup and view all the answers

What type of waste do bidets specifically assist in cleaning?

Delicate private parts Signup and view all the answers

Which of the following is NOT a type of water closet mentioned?

Dual-flush Signup and view all the answers

What is the main function of a check valve?

To allow water to flow in one direction only Signup and view all the answers

What is a key disadvantage of ball valves?

They cannot effectively throttle flow Signup and view all the answers

Which type of check valve uses gravity to close the passage?

Swing check valve Signup and view all the answers

In which application is a float valve typically used?

Inside a flush tank Signup and view all the answers

How does a spring check valve operate?

Water pressure opens the gate, and a spring closes it Signup and view all the answers

What shape does the valve design of the toilet and urinal valve resemble?

L-shaped Signup and view all the answers

Which of the following statements about ball valves is true?

They are durable and reliable for various applications. Signup and view all the answers

What action does a check valve perform to prevent backflow?

It swings open and closes automatically based on pressure. Signup and view all the answers

Study Notes

Pipe Materials

Vitrified Clay Pipe: Made from clay, resistant to acid waste, used in sewer systems. Lengths of 75 cm, treated with a glazing compound. Brittle and requires stable placement.
Lead Pipe: One of the oldest materials, highly resistant to acids but toxic; banned for potable and non-potable water.
Galvanized Steel Pipe: Coated with zinc for corrosion resistance. Suitable for outdoor and heating pipes but vulnerable to alkaline and acid water.
Galvanized Wrought Iron Pipe: Higher quality than galvanized steel, more acid resistant.
Brass Pipe: Expensive, composed of 15% zinc and 85% copper, has a smooth interior preferred for waste and supply.
Copper Pipe: Common in heating systems; durable and corrosive-resistant. Types include:
- Type K: Heaviest and used underground.
- Type L: Lighter, used for residential systems.
- Type M: Thinnest, designed for small supply lines.
Stainless Steel Pipe: Used for gas, oil, steam, and water. Available in threaded and unthreaded forms.
Plastic/Synthetic Pipes: Including PVC, widely used for cold water lines; rust-resistant, corrosion-free, smooth interior. Types include:
- Rigid: PVC, uPVC, CPVC, PP, ABS.
- Flexible: PB, PE, PEX.

Pipe Fittings

Elbows: Curved connectors for 22.5°, 45°, and 90° angles, connecting pipes of the same size.
Tee: T-shaped connector with an inlet and outlet.
Cross-type: Four openings, used in fire sprinkler systems.
Barbs: Connect hoses to pipes, male on one end, tapered on the other.
Nipple: Connects two fittings.
Adaptor: Plain on one end, threaded on the other for different sizes.
Reducer: Changes flow rate by connecting different sizes of pipes.
Coupling: Permanent connection for smaller diameter pipes.
Union: Similar to coupling, but removable with female threads.
Olets: Unconventional shapes for non-standard connections.
Wye: Y-shaped fitting for sanitary and waste piping.
Plug and Cap: Close off piping connections.

Valves

Gate Valves: Popular shut-off valve with a metal gate for gradual flow regulation. Advantages include preventing water hammer; disadvantages include slow operation.
Globe Valves: Used for regulating flow; offers throttling capability but can cause pressure drops.
Angle Valves: L-shaped design controlling fluid flow, commonly used in sink and toilet applications.
Ball Valves: Control fluid flow with a hollow ball; known for speed and reliability, but not for throttling.
Check Valves: Allow one-way flow, preventing backflow, can be swing or spring types. Must have steady flow for operation.
Toilet and Urinal Valves: Manage water levels in tanks and supply water for flushing.

Plumbing Fixtures

Water Closets: Fixtures for human waste disposal. Include various types: pail flush, squat, wash down, siphon jet, and sensor-operated models.
Urinals: Designed for liquid waste from males.
Lavatories: Used for handwashing. Available in multiple shapes including round, square, and triangular.
Bathtubs: Fixtures for soaking, with innovations for comfort and functionality.
Bidets: Devices for personal hygiene beside water closets.
Showers: Discharge fresh water, often equipped with heating systems.
Kitchen Sinks: Used for washing dishes and food preparation; similar to lavatories in function.

Plumbing Symbols

Standardized representations of pipes, fittings, valves, equipment, and fixtures used in plumbing systems.

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Description

This quiz explores the characteristics and uses of vitrified clay pipes. Known for their resistance to acid wastes, these pipes are commonly found in sewer systems. However, it's important to highlight their brittle nature and limitations when in contact with hot substances.