Unit 003- Understand scientific principles

Multiple Choice

Which of the following is a non-ferrous metal commonly used in plumbing materials?

• Steel

• Iron

• Copper

• Plastic

Multiple Choice

Which material is not typically used in plumbing?

• Steel

• Iron

• Wood

• Plastic

Multiple Choice

What type of material is an alloy?

• A single metal

• A combination of metals

• A type of plastic

• A type of ceramic

Multiple Choice

Which of the following metals is considered ferrous?

• Copper

• Aluminium

• Iron

• Zinc

Multiple Choice

What characteristic is true of ferrous metals?

• They are non-magnetic.

• They do not corrode.

• They contain iron.

• They are always lightweight.

Multiple Choice

Which of the following is NOT a pure metal used in plumbing?

• Lead

• Zinc

• Plastic

• Aluminium

Multiple Choice

What happens to ferrous metals if they are not treated?

• They become non-magnetic.

• They corrode easily.

• They become lighter.

• They change color.

Multiple Choice

What metals are combined to form brass?

• Copper and tin

• Copper and zinc

• Copper, tin, and zinc

• Iron and carbon

Multiple Choice

Which of the following is a non-ferrous metal?

• Steel

• Iron

• Copper

• Carbon

Multiple Choice

What is gunmetal composed of?

• Copper and zinc

• Copper and tin

• Copper, tin, and zinc

• Iron and carbon

Multiple Choice

Which alloy is made from iron and carbon?

• Brass

• Bronze

• Gunmetal

• Steel

Multiple Choice

What are plastics used for in plumbing?

• Only for cold water

• Only for hot water

• Central heating, guttering, and drainage

• Only for above ground drainage

Multiple Choice

What is a characteristic of thermoplastics?

• Cannot be reshaped

• Become brittle when heated

• Made from metal

• Can be heated and reshaped

Multiple Choice

What happens to thermoplastics when they are frozen?

• They melt

• They become brittle

• They expand

• They become flexible

Multiple Choice

What is a benefit of using thermoplastics?

• They are non-recyclable

• They are made from metal

• They are recyclable

• They cannot be reshaped

Multiple Choice

What is PVCu commonly used for?

• Hot water pipes

• Cold water and soil pipes

• Electrical wiring

• Insulation

Multiple Choice

Which material is not suitable for hot water?

• HDPE

• MDPE

• PVCu

• Copper

Multiple Choice

What does MDPE stand for?

• Medium density polyethylene

• Maximum density polyethylene

• Minimum density polyethylene

• Modified density polyethylene

Multiple Choice

Which material degrades in sunlight?

• PVCu

• MDPE

• HDPE

• Copper

Multiple Choice

What is a common characteristic of both MDPE and HDPE?

• Suitable for hot water

• Degrades in sunlight

• Used for electrical wiring

• Not suitable for underground mains

Multiple Choice

Which thermoplastic is used for waste pipes and degrades in direct sunlight?

• Polypropylene

• Polybutylene

• ABS Acrylonitrile Butadiene Styrene

• PVC

Multiple Choice

What is a characteristic of Polybutylene in plumbing applications?

• Solvent welded

• Push fit

• Feels greasy to the touch

• Degrades in sunlight

Multiple Choice

Which material is known for being solvent welded and degrading in sunlight?

• Polypropylene

• Polybutylene

• ABS Acrylonitrile Butadiene Styrene

• PVC

Multiple Choice

Which thermoplastic is not solvent welded and is used for cold and hot water applications?

• Polypropylene

• Polybutylene

• ABS Acrylonitrile Butadiene Styrene

• PVC

Multiple Choice

What are thermosetting plastics?

• Plastics that can be recycled

• Rigid plastics that can cope with high temperatures but are not recyclable

• Flexible plastics that melt at high temperatures

• Plastics that are used for packaging

Multiple Choice

Which of the following are examples of thermosetting plastics?

• Polyethylene and polypropylene

• Formica and bakelite

• Nylon and polyester

• PVC and polystyrene

Multiple Choice

Which of the following is a property of plumbing materials?

• Flexibility

• Hardness

• Transparency

• Buoyancy

Multiple Choice

What determines the properties of a solid material?

• The color of the material

• The size of the molecules

• The arrangement and behavior of molecules

• The weight of the material

Multiple Choice

Which property refers to a material's ability to be stretched into a wire?

• Malleability

• Elasticity

• Ductility

• Durability

Multiple Choice

What is the term for a material's ability to conduct heat and electricity?

• Thermal expansion

• Conductivity

• Elasticity

• Strength

Multiple Choice

What is tensile strength?

• The ability of a material to conduct electricity

• The ability of a material to resist heat

• The ability of a material to stretch or break when pulled

• The ability of a material to absorb water

Multiple Choice

In what units is tensile strength measured?

• Kilograms

• Liters

• N/m² or pascals

• Joules

Multiple Choice

What does compressive strength refer to in plumbing materials?

• The ability of a material to withstand tension

• The ability of a material to conduct electricity

• The ability of a material to resist being crushed

• The ability of a material to absorb water

Multiple Choice

What might happen to a material with low compressive strength when it is crushed?

• It will melt

• It will shatter or distort

• It will expand

• It will become magnetic

Multiple Choice

What is shear strength in the context of plumbing materials?

• The ability of a material to withstand tension.

• The ability of a material to conduct electricity.

• The ability of a material to resist opposing forces.

• The ability of a material to absorb water.

Multiple Choice

Which of the following is an example of shear strength?

• Bending a metal rod.

• Cutting with scissors.

• Stretching a rubber band.

• Melting a plastic sheet.

Multiple Choice

What property of a material describes its ability to be pulled, pushed, or stretched without breaking?

• Ductility

• Hardness

• Elasticity

• Brittleness

Multiple Choice

Which material is mentioned as being very ductile in the text?

• Aluminum

• Copper

• Steel

• Plastic

Multiple Choice

What property describes a material's ability to be compressed without fracturing?

• Elasticity

• Malleability

• Conductivity

• Density

Multiple Choice

Which material is mentioned as being very malleable?

• Copper

• Aluminum

• Lead

• Steel

Multiple Choice

What is hardness in the context of plumbing materials?

• The ability to conduct electricity

• The resistance to bending, scratching, abrasion, or cutting

• The capacity to absorb water

• The flexibility of a material

Multiple Choice

Which of the following materials is likely the hardest based on the ability to resist cutting?

• Wood

• Copper

• LCS

• Diamond