outcome 1 SP

Open Ended

Why do you think it is important to understand the properties of different plumbing materials before starting a plumbing project?

Multiple Choice

Which of the following materials is commonly used in plumbing for its resistance to corrosion?

• Steel

• Iron

• Plastic

• Alloys

Multiple Choice

Which of the following is a property of ferrous metals used in plumbing?

• They contain iron and are magnetic

• They do not corrode easily

• They are non-magnetic

• They are always alloys

Multiple Choice

What is the main difference between alloys and pure metals as used in plumbing materials?

• Alloys are mixtures of metals, pure metals are single elements

• Alloys are always stronger than pure metals

• Pure metals are always cheaper than alloys

• Alloys contain only non-ferrous metals

Multiple Choice

Which of the following thermoplastics is suitable for underground mains and degrades in sunlight?

• MDPE

• Polypropylene

• Polybutylene

• ABS

Multiple Select

Select all the correct statements about thermosetting plastics:

• They are rigid and can withstand high temperatures

• They are recyclable

• Formica and bakelite are examples

• They are suitable for repeated reshaping

Open Ended

Explain the advantages and disadvantages of using thermoplastics versus thermosetting plastics in plumbing applications.

Multiple Choice

Which of the following statements best explains the difference between mass and weight?

• Mass is the force of gravity on an object, while weight is the amount of substance.

• Mass is measured in newtons, while weight is measured in kilograms.

• Mass is the amount of substance measured in kilograms, while weight is the force of gravity pulling on a mass measured in newtons.

• Mass and weight are the same and can be used interchangeably.

Multiple Choice

How does gravity affect the weight of an object on the moon compared to on Earth?

• The weight increases on the moon because gravity is stronger.

• The weight decreases on the moon because gravity is weaker.

• The weight stays the same because mass does not change.

• The weight becomes zero on the moon.

Open Ended

Explain how density is calculated and why two objects of the same size might have different weights.

Multiple Choice

Which of the following materials is a good conductor of heat and why?

• Wood, because it has tightly packed molecules.

• Copper, because it is a metal and conducts heat well.

• Plastic, because it is lightweight.

• Glass, because it is transparent.

Multiple Select

Select all materials from the table that will sink in water based on their relative density.

• uPVC

• Polythene

• Aluminium

• Copper

Multiple Choice

Which of the following is NOT a property of plumbing materials as listed in the presentation?

• Strength

• Transparency

• Ductility

• Elasticity

Multiple Choice

Which types of strength are discussed in the slides, and what do they measure?

• Tensile strength, compressive strength, and shear strength; they measure how a material responds to stretching, crushing, and opposing forces respectively.

• Only tensile strength; it measures how a material responds to stretching.

• Only compressive strength; it measures how a material responds to crushing.

• Only shear strength; it measures how a material responds to twisting.

Open Ended

Explain how the arrangement and behavior of molecules in a solid material affect its properties, such as strength and ductility.

Multiple Choice

Which material is described as very malleable and can be bossed into shape according to the slides?

• Copper

• Lead

• Steel

• Plastic

Open Ended

Describe a real-world scenario where the malleability of a material is important in plumbing work.

Multiple Choice

Which property of plumbing materials describes their resistance to bending, scratching, abrasion, or cutting?

• Hardness

• Specific heat capacity

• Coefficient of linear expansion

• Density

Open Ended

Explain why specific heat capacity is important for plumbers when working with different materials.

Multiple Choice

Which of the following materials has the lowest specific heat capacity?

• Lead

• Copper

• Water

• Aluminium

Open Ended

What factors must plumbers consider regarding the coefficient of linear expansion when installing pipes?

Multiple Choice

How much will a 6 metre length of copper pipe expand if the temperature rises by 10°C?

• 0.96mm

• 1.6mm

• 0.011mm

• 0.29mm

Open Ended

What questions do you still have about the properties of common plumbing materials?

Multiple Choice

Which of the following is NOT a common plumbing material listed in the lesson?

• Steel

• Iron

• Wood

• Plastic