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[MOCK EXAM] Scientific Principles - End of Unit Test

Total questions: 75

Worksheet time: 38mins

Name
Class
Date
1.

Brass is an alloy made from (a)  

2.

The definition of an alloy is:

a)

It is magnetic

b)

It is a mixture of two or more metals

c)

It is always coloured silver

d)

The main property of the material is heat retention

3.

Which of the following is a ferrous metal?

a)

Brass

b)

Copper

c)

Cast iron

d)

Aluminium

4.

Ceramics are used for:

a)

Insulation on cold water pipework

b)

Kitchen cupboard doors for hygiene

c)

Sanitary appliances

d)

Filtration systems for swimming pools

5.

Polybutylene can be used for:

a)

Guttering

b)

Downpipes

c)

Waste pipes

d)

Central heating pipes

6.

Which of the following statements is true about a thermoplastic?

a)

When cold it can be brittle

b)

It remains soft and pliable at any temperature

c)

It cannot be recycled

d)

Once heated it cannot be re-shaped

7.

Hardness describes the ability of a material to resist scratching, bending, abrasion and cutting.

a)

TRUE

b)

FALSE

8.

MDPE plastic is used for:

a)

Underground cold water supplies

b)

Above ground cold water supplies

c)

Underground hot water supplies

d)

Above ground hot water supplies

9.

Malleability describes the capacity for a material to be cut cleanly by two opposing forces

a)

True

b)

False

10.

De-zincification can take place in what metal?

a)
Brass
b)

Copper

c)

LCS

d)

Gunmetal

11.

Which is the best description of dezincification?

a)

Tin is leached out of a bronze component

b)

Copper is leached out of a brass component

c)

Iron eats into a zinc component

d)

Zinc is leached out of a brass component

12.

During electrolytic action the

a)

Anode will gradually destroy the cathode

b)

Cathode will gradually destroy the anode

c)

Electrolyte will be used up and disappear

d)

Electrolyte will destroy the cathode

13.

Which pipe will expand the most when heated-

a)
b)
c)
d)
14.

Metals that contain iron are known as?

(a)  

15.

Weight is a force, it is measured in?

a)

KG

b)

Newtons

c)

Grams

d)

Pounds

16.

Tensile strength: how strong is it when it is?

a)

stretched or pulled

b)

crushed

c)

forces are opposing

d)

How much can a material be pulled, pushed or stretched without breaking

17.

Compression strength: how strong is it when it is?

a)

stretched or pulled

b)

crushed

c)

forces are opposing

d)

How much can a material be pulled, pushed or stretched without breaking

18.

Shear strength: how strong is it when it is?

a)

stretched or pulled

b)

crushed

c)

forces are opposing

d)

How much can a material be pulled, pushed or stretched without breaking

19.

Ductile strength: how strong is it when it is?

a)

stretched or pulled

b)

crushed

c)

forces are opposing

d)

How much can a material be pulled, pushed or stretched without breaking

20.

Malleability is how much can a material be?

a)

How much can a material be pulled, pushed or stretched without breaking

b)

compressed without fracturing

c)

This is the resistance of a material to bending, scratching, abrasion or cutting

d)

All of the above

21.

Hardness is how much can a material be?

a)

How much can a material be pulled, pushed or stretched without breaking

b)

compressed without fracturing

c)

This is the resistance of a material to bending, scratching, abrasion or cutting

d)

All of the above

22.

Coefficient of linear expansion is?

a)

How much energy is required to heat something up

b)

How much does a piece of material expand by when heated

c)

The amount and speed of the corrosion

d)

How much can a material be pulled, pushed or stretched without breaking

23.

Coefficient of linear expansion is calculated by?

a)

Length in mm X Temp rise X Coefficient of the material

b)

Length in mm X weight in KG X Coefficient of the material

c)

Length in m X Temp rise X Coefficient of the material

d)

Length in mm - Temp rise - Coefficient of the material

24.

Pure metals are derived directly from the ore and contain small amounts of impurities. What are these metals?

a)

Steel, stainless steel, brass, gunmetal, pewter.

b)

iron, copper, aluminium, lead, zinc, tin

c)

cast iron, pig iron, wrought iron, low carbon steel.

d)

tool steel, spun iron, low carbon steel

25.

How are plastics protected from the effects of UV light.

a)

Painting

b)

Wrapping

c)

Sleeving

d)

Galvanising

26.

Sacrificial anodes are placed inside hot water storage cylinders to protect them from which type of corrosion?

a)

Rusting

b)

Acid

c)

Electrolytic

d)

Erosion corrosion

27.

Which one of the properties of water is shown by its pH value?

a)

It’s degree of acidity or alkalinity.

b)

It’s electrical conductivity

c)

The amount of heat it contains.

d)

It’s heat conductivity

28.

Relative density is the

a)

Density of a substance divided by its volume

b)

Density of a substance in comparison to the density of water

c)

Density of water displaced when a substance is placed in water

d)

Force exerted by the density of a substance

29.

Water from an area which has a limestone and chalk bedrock, is most likely to be

a)

Cloudy

b)

Chalky

c)

Alkaline

d)

Acidic

30.

Kelvin is the SI unit for:

a)

Density

b)

Conduction

c)

Pressure

d)

Temperature

31.

Copper allows a current to flow through it easily, this is because:

a)

It has a high permeability

b)

It is a good electrical conductor

c)

It is a good electrical insulator

d)

It has a high transmittance

32.

The amount of electrolytic corrosion between two metals depends upon:

a)

Their relative positions in the electromotive series

b)

Their respective atomic number

c)

Them both being dielectric substances

d)

Their relationship in the automotive sequence

33.

Pure water is classified as neutral and has a PH value of:

a)

1

b)

7

c)

10

d)

5

34.

In a temporary hard water area, what should the cylinder thermostat maximum temperature be set to in order to prevent scale build up?

a)

60oC

b)

55oC

c)

65oC

d)

45oC

35.

Water is at its most dense when it is at a temperature of

a)

0oC

b)

4oC

c)

60oC

d)

100oC

36.

which type of water will cause scaling of pipes

a)

temporary hard water

b)

permanent hard water

c)

temporary soft water

d)

permanent soft water

37.

by how much will a 10m length of plastic guuter expand when heated from 20oC to 30oC. The coefficient of linear expansion for plastic is 0.00018

a)

9mm

b)

18mm

c)

180mm

d)

1.8m

38.

What is a compression fitting made of ?

a)

BRONZE

b)

STEEL

c)

COPPER

d)

BRASS

39.

What are the 3 states of water ?

a)

SOLID,LIQUID,GAS

b)

GAS,STEAM,

VAPOUR

c)

SOLID,GAS,VAPOUR

d)

LIQUID,GAS,STEAM

40.

When water reaches 100 degrees. How much does it expand by ?

a)

800X

b)

1000X

c)

1600X

d)

1800X

41.

What is LCS pipe made from ?

a)

COPPER & BRONZE

b)

STEEL & CARBON

c)

WOOD & STEEL

d)

STEEL & COOPER

42.

Name a source of water ?

a)

A River

b)

A Puddle

c)

An Ocean

d)

A Septic tank

43.

Name a part of the water cycle ?

a)

Evaluation

b)

Permantation

c)

Evacuation

d)

Percipatation

44.

What is clean drinkable water classed as ?

a)

Wholesome

b)

Dirty water

c)

Sewage

d)

Stored water

45.

How much does a litre of water weigh ?

a)

1000KG

b)

100KG

c)

10KG

d)

1KG

46.

If you heat water to 100'c, What would it measure on the kelvin scale ?

a)

373

b)

273

c)

173

d)

-273

47.

Brass is an alloy made from ?

a)

Copper & Tin

b)

Zinc & Copper

c)

Copper & Aluminium

d)

Bronze & Copper

48.

The base unit of length is ?

a)

A Yard

b)

A Meter

c)

A Hand

d)

A Foot

49.

The base unit for mass is ?

a)

Kilograms

b)

Pounds

c)

Grams

d)

Ounces

50.

Electric current is measured in what ?

a)

Watts

b)

Volts

c)

Current

d)

Amps

51.

When frozen. Water expands by ?

a)

8%

b)

40%

c)

10%

d)

4%

52.

At what temperature does water reach its maximum density ?

a)

4 Degrees c

b)

8 Degrees c

c)

6 Degrees c

d)

10 Degrees c

53.

Which material can de-zincafication take place in ?

a)

Copper

b)

Coal

c)

Brass

d)

Aluminium

54.

At what temperature can limescale build up ?

a)

65C

b)

75C

c)

45C

d)

55C

55.

What 3 elements do you need for rust to build up in an heating system ?

a)

Water+Limescale+Iron

b)

Oxygen+Iron+Water

c)

Oxygen+Brass+Iron

d)

Iron+Water+Brass

56.

What is it called when molecules want to stick together ?

a)

Cohersion

b)

Cohesion

c)

Sticky

d)

Adhesion

57.

What pipe is used for underground water supplies ?

a)

MDPE

b)

MFI

c)

Polybutylene

d)

Low Carbon Steel

58.

Polybutylene can be used for what ?

a)

Guttering

b)

Downpipes

c)

Wastepipe

d)

Central Heating Pipe

59.

Which of the following would you not find made of cast-iron ?

a)

Shower trays

b)

Baths

c)

Radiators

d)

Pumps

60.

Thermoplastics can be ?

a)

Pliable

b)

Brittle

c)

Recycled

d)

Reshaped

61.

None-Ferrous metals can ?

a)

Be Magnetic

b)

Rust over time

c)

Have Iron In It

d)

Corrode over time

62.

Which of the following is a Ferrous metal ?

a)

Brass

b)

Copper

c)

Cast Iron

d)

Aluminium

63.

When Water Is Heated We Call It Expansion. What is it called when it is cooled down ?

a)

Evaporation

b)

Condensation

c)

Contraction

d)

Evaluation

64.

What Is the Hardest Material Known to Man ?

a)

Wood

b)

Iron

c)

Diamond

d)

Gold

65.

Heat can be measured in ?

a)

Kevin

b)

Claudius

c)

Celcius

d)

Degress

66.

What can take place in a fluid state or gas state ?

a)

Penertration

b)

Convection

c)

Conduction

d)

Filtration

67.

What do we use to measure temperature ?

a)

Manometer

b)

U-gauge

c)

Thermometer

d)

Tape measure

68.

Does a shiny surface absorb or reflect heat ?

a)

Absorb

b)

Reflect

69.

The material doing the cutting must be harder than the material being cut ?

a)

TRUE

b)

FALSE

70.

Conduction happens when heat travels through or along a material

a)

FALSE

b)

TRUE

71.

The term 'Conductivity' can refer to both Electrical and Thermal ?

a)

TRUE

b)

FALSE

72.

Tensile strength is the measure of how well or badly a material reacts to being cut ?

a)

TRUE

b)

FALSE

73.

Hardness describes the ability to resist ?

a)

Abrasion

b)

Bending

c)

Scratching

d)

All the above

74.

A build-up of limescale is likely to produce?

a)

A restriction in flow

b)

An unsightly evaporation

c)

De-zincification

d)

Erosion

75.

If rain water falls on moorland/peat, Hard water is produced ?

a)

TRUE

b)

FALSE

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