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Properties of plumbing materials

Total questions: 54

Worksheet time: 27mins

Name
Class
Date
1.

Which category is included among the properties of plumbing materials?

a)

Alloys

b)

Ceramics

c)

Glass

d)

Timber

2.

Which of the following are pure metals gained straight from ore?

a)

Copper

b)

Aluminium

c)

Lead

d)

Zinc

e)

Steel

3.

Which statement best characterizes ferrous metals?

a)

They contain iron, are magnetic, and will corrode easily if not treated.

b)

They do not contain iron and therefore cannot rust.

c)

They are always non‑magnetic and resistant to corrosion.

d)

They are plastic-based compounds used for below ground drainage.

4.

Which alloy is a mixture of copper and zinc?

a)

Brass

b)

Bronze

c)

Gunmetal

d)

Steel

5.

Which alloy is described as copper and tin?

a)

Bronze

b)

Brass

c)

Gunmetal

d)

Steel

6.

Which alloy is described as copper, tin and zinc?

a)

Gunmetal

b)

Brass

c)

Bronze

d)

Steel

7.

Which material is described as iron and carbon?

a)

Steel

b)

Brass

c)

Bronze

d)

Gunmetal

8.

Which definition of non‑ferrous metals is correct?

a)

Any metal that does not contain iron

b)

Any metal that contains iron and is magnetic

c)

Any polymer resin used in guttering

d)

Any alloy made only of copper and zinc

9.

According to the definition of plastics, what happens to thermoplastics when frozen.

a)

They become brittle

b)

They dissolve in water

c)

They expand and harden permanently

d)

They cannot be re‑shaped when heated

10.

From the thermoplastic description, which statement is accurate.

a)

Made from polymer resin; can be heated and re‑shaped and are recyclable.

b)

Made from ceramic powder; cannot be heated or re‑shaped and are non‑recyclable.

c)

Made from metal alloys; only suitable for boilers.

d)

Made from timber; used exclusively for guttering.

11.

Which material is described as unplasticised polyvinyl chloride and noted as not suitable for hot water?

a)

PVCu

b)

MDPE

c)

HDPE

12.

What colour is specified for MDPE underground mains according to the Thermoplastics table?

a)

Blue

b)

Black

c)

White

13.

According to the Thermoplastics table, what colour is specified for HDPE underground mains?

a)

Blue

b)

Black

c)

White

14.

Which jointing method is listed as common to PVCu, MDPE, and HDPE in the Thermoplastics table?

a)

Push fit

b)

Solvent welded

c)

Fusion welded

d)

Compression

15.

Which option correctly identifies the materials that are stated to degrade in sunlight in the Thermoplastics table?

a)

PVCu only

b)

MDPE only

c)

HDPE only

d)

MDPE and HDPE

16.

Which material is described as feeling slightly greasy to the touch and not solvent welded in the Thermoplastics table?

a)

Polypropylene

b)

Polybutylene

c)

ABS (Acrylonitrile Butadiene Styrene)

17.

Which thermoplastic is listed for hot water and central heating applications?

a)

Polybutylene

b)

Polypropylene

c)

ABS (Acrylonitrile Butadiene Styrene)

18.

Which material in the Thermoplastics table is explicitly stated as solvent welded?

a)

Polypropylene

b)

Polybutylene

c)

ABS (Acrylonitrile Butadiene Styrene)

19.

Select all materials that are noted as degrading in sunlight in the Thermoplastics table.

a)

Polypropylene

b)

Polybutylene

c)

ABS (Acrylonitrile Butadiene Styrene)

20.

Thermosetting plastics are defined as rigid plastics that can cope with high temperatures but are not recyclable. Which statement aligns with this definition?

a)

They withstand high temperatures and are not recyclable

b)

They melt on heating and are easily recyclable

c)

They cannot withstand high temperatures and are recyclable

d)

They soften on heating and can be solvent welded

21.

Which pair lists examples of thermosetting plastics?

a)

Formica and bakelite

b)

PVCu and MDPE

c)

Polypropylene and ABS

d)

HDPE and Polybutylene

22.

Mass is an amount of substance measured in kilograms. Which statement correctly defines weight as presented?

a)

Weight is the force of gravity pulling on a mass

b)

Weight is the amount of substance measured in kilograms

c)

Weight is a property of mass that stays constant everywhere

d)

Weight equals mass divided by gravity

23.

Which unit is stated for measuring weight?

a)

Newtons

b)

Kilograms

c)

Litres

d)

Pascals

24.

What is the formula relating weight, mass, and gravity?

a)

weight=mass×gravityweight = mass \times gravity

b)

weight=mass÷gravityweight = mass \div gravity

c)

weight=gravity÷massweight = gravity \div mass

d)

weight=mass+gravityweight = mass + gravity

25.

On earth, approximately what is the weight of a 1 kg1\,\text{kg} mass?

a)

1 N1\,\text{N}

b)

9.81 N9.81\,\text{N}

c)

100 N100\,\text{N}

d)

10 kg10\,\text{kg}

26.

Which quantity changes when you go to the moon, while the other stays the same?

a)

Weight changes; mass stays the same

b)

Mass changes; weight stays the same

c)

Both mass and weight change

d)

Neither mass nor weight changes

27.

Which statement best defines gravity as presented?

a)

Gravity is a force of attraction between masses

b)

Gravity is the amount of substance in an object

c)

Gravity is the tendency of plastics to degrade in sunlight

d)

Gravity is measured in kilograms

28.

Which statement about gravity and mass is correct?

a)

The bigger the mass, the bigger the gravity

b)

Gravity decreases as mass increases

c)

Gravity is unrelated to mass

d)

Mass is a force measured in newtons

29.

What value is given for gravity on the moon compared with earth?

a)

1.6 N1.6\,\text{N} on the moon and 9.81 N9.81\,\text{N} on earth

b)

9.81 N9.81\,\text{N} on the moon and 1.6 N1.6\,\text{N} on earth

c)

10 N10\,\text{N} on both moon and earth

d)

1 N1\,\text{N} on the moon and 100 N100\,\text{N} on earth

30.

What is the correct formula for density?

a)

density=massvolumedensity = \frac{mass}{volume}

b)

density=mass×volumedensity = mass \times volume

c)

density=volumemassdensity = \frac{volume}{mass}

d)

density=mass−volumedensity = mass - volume

31.

Solid materials of the same size and shape can have different weight because their molecules are more tightly packed together. Which property is being described?

a)

Density

b)

Elasticity

c)

Malleability

d)

Durability

32.

Heat transfer through differing materials can vary according to their density, like a heat exchanger. Which pairing is correctly associated?

a)

Dry to wet — Boiler

b)

Dry to wet — Radiator

c)

Wet to dry — DHWC

d)

Wet to wet — Warm air unit

33.

Heated molecules pass on heat to the adjoining material, which in turn heats up. Which material is identified as a good conductor of heat?

a)

Copper

b)

Wood

c)

Polythene

d)

uPVC

34.

Relative density is when we compare the mass of material. Water is said to have a density of 11 . What happens to a solid or liquid with a density greater than 11 in water?

a)

It sinks

b)

It floats

c)

It mixes without sinking or rising

d)

It evaporates

35.

Air is said to have a density of 11 . What happens to a gas with a density less than 11 in air?

a)

It rises

b)

It sinks

c)

It mixes without moving

d)

It condenses

36.

From the relative density table, which material will float in water?

a)

Polythene (0.90)

b)

uPVC (1.28)

c)

Aluminium (2.70)

d)

Copper (8.90)

37.

According to the table, which gas will rise in air?

a)

Natural gas (0.6)

b)

Air (1.0)

c)

Propane (1.5)

d)

Butane (2.0)

38.

Based on the table, which materials will sink in water? Select all that apply.

a)

uPVC (1.28)

b)

Aluminium (2.70)

c)

Cast iron (7.90)

d)

Copper (8.90)

39.

Which material in the table has the highest relative density among the listed solids?

a)

Copper (8.90)

b)

Cast iron (7.90)

c)

Aluminium (2.70)

d)

uPVC (1.28)

40.

Which property refers to a material’s ability to be drawn into a wire?

a)

Ductility

b)

Malleability

c)

Elasticity

d)

Hardness

41.

Which property refers to a material’s ability to be flattened or shaped into thin sheets?

a)

Malleability

b)

Ductility

c)

Strength

d)

Durability

42.

Which property describes the change in a material’s dimensions when heated?

a)

Thermal expansion

b)

Conductivity

c)

Elasticity

d)

Strength

43.

In the context of properties of plumbing materials, which property measures how strong a material is when it is stretched or pulled without breaking?

a)

Tensile strength

b)

Compressive strength

c)

Shear strength

d)

Malleability

44.

According to the description of tensile strength, in what units is this strength measured?

a)

N/m2N/m^2 or pascals

b)

Volts

c)

Degrees Celsius

d)

Ohms

45.

Which property measures how strong a material is when it is crushed, noting that some materials will shatter while others distort?

a)

Compressive strength

b)

Tensile strength

c)

Shear strength

d)

Ductility

46.

Which property describes how strong a material is when opposing forces act on it, such as with scissors or ripping apart?

a)

Shear strength

b)

Tensile strength

c)

Compressive strength

d)

Malleability

47.

Which property, sometimes known as toughness, asks how much a material can be pulled, pushed or stretched without breaking?

a)

Ductility

b)

Brittleness

c)

Malleability

d)

Hardness

48.

Which material is described as very ductile because it can be bent into shape as tubing?

a)

Copper

b)

Lead

c)

Concrete

d)

Glass

49.

Which property asks how much a material can be compressed without fracturing and whether hammering or rolling will change its shape without cracking?

a)

Malleability

b)

Ductility

c)

Tensile strength

d)

Shear strength

50.

Which material is noted as very malleable because it can be bossed into shape?

a)

Lead

b)

Copper

c)

Steel

d)

Plastic

51.

Specific heat capacity: How much energy is required to heat something up? Choose the best definition.

a)

The amount of heat required to raise 1 kg of a substance by 1°C

b)

The maximum temperature a material can withstand before deforming

c)

The heat needed to melt 1 kg of a substance

d)

The energy required to raise 1 litre of water by 10°C

52.

Specific heat capacity: Using the table of values (Water 4.186 KJ/kg), how much energy is required to raise 150 litres of water from 10°C to 50°C? Assume 1 litre of water has a mass of 1 kg.

a)

25,116 kJ

b)

15,000 kJ

c)

6,279 kJ

d)

40,000 kJ

53.

Coefficient of linear expansion: How much does a piece of material expand by when heated? Select the best description.

a)

The change in length of a material per degree of temperature increase

b)

The total heat needed to increase a material’s temperature by 1°C

c)

The rate at which a material conducts heat through itself

d)

The energy stored in a material when it cools

54.

Coefficient of linear expansion: Length of material × the temperature rise × the coefficient of expansion for that material. Using the table of coefficients (Plastic uPVC 0.00018; Lead 0.000029; Copper 0.000016; Steel 0.000011), how much will a 6 metre length of plastic guttering expand by, if the temperature rises by 10°C?

a)

10.8 mm

b)

1.8 mm

c)

108 mm

d)

0.18 mm

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