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WorksheetsL2 EAL 003 unit revision 1
Total questions: 30
Worksheet time: 15mins
What is the carbon content range of low carbon steels?
0.05%-0.25%
0.29%-0.54%
0.55%-0.95%
0.96%-2.1%
Which metal is not a ferrous metal?
Iron
Steel
Aluminium
Cast iron
Which property describes the ability of a material to return to its original shape after being distorted?
Ductility
Elasticity
Malleability
Hardness
What is the ability of a material to resist fracture when subject to tensile load?
Compressive strength
Shear strength
Tensile strength
Toughness
Which of the following media has the fastest cooling rate for quenching?
Oil
Gas
Water
Brine
At what temperature range is steel typically heated during the annealing process?
500-700°C
830-950°C
200-300°C
100-200°C
Which type of steel cannot be hardened by heating and quenching?
Low carbon steel
Medium carbon steel with higher carbon content
High carbon steel
Medium carbon steel with lower carbon content
Which material property describes the ability to be beaten or hammered into shape without fracture?
Ductility
Malleability
Toughness
Hardness
Which thermoplastic is used for cable and wire insulation?
Rigid PVC
Polythene
Polypropylene
Flexible PVC
What is the primary function of tempering in heat treatment?
To soften the metal
To make the metal ductile
To make the metal tougher and less brittle
To increase the metal's hardness
What is the composition range of very high carbon steel?
0.05%-0.25%
0.29%-0.54%
0.55%-0.95%
0.96%-2.1%
Which heat treatment process involves slow cooling to make the metal softer and more ductile?
Normalising
Hardening
Annealing
Tempering
What is the ability of a material to resist fracture under shear loading?
Tensile strength
Shear strength
Compressive strength
Toughness
Which property describes the ability of a material to stand up to sudden shock loads or blows without fracture?
Ductility
Toughness
Hardness
Plasticity
Which of the following is not a thermoplastic?
Rigid PVC
Flexible PVC
Polythene
Phenol formaldehyde
What is the effect of rapid cooling during quenching on high-carbon steels?
Makes the metal ductile
Makes the metal tough
Makes the metal very hard
Makes the metal soft
What does the term "hardenability" depend on?
The cooling rate
The chemical composition of the steel alloy
The heating temperature
The quenching media
Which type of heat transfer involves direct contact between materials?
Conduction
Convection
Radiation
Insulation
What is the unit of force in the SI system?
Joule
Newton
Kilogram
Watt
Which steel type is known as mild steel?
Low carbon steel
Medium carbon steel
High carbon steel
Very high carbon steel
Which property describes the ability of a material to be drawn out in tension without fracture?
Ductility
Elasticity
Malleability
Toughness
Which thermoplastic is commonly used for bags and bottles?
Rigid PVC
Polythene
Polypropylene
Flexible PVC
What is the main disadvantage of high carbon steels compared to other steels?
They are less tough
They are less strong
They are less hard
They are less costly
What is the relationship between force and distance in calculating a moment?
Moment = Distance / Force
Moment = Force x Distance
Moment = Force / Distance
Moment = Force + Distance
Which material property is tested by applying a compressive load?
Tensile strength
Shear strength
Compressive strength
Hardness
What is the main purpose of normalising in heat treatment?
To soften the metal
To relieve stress in the material
To harden the metal
To make the metal brittle
Which thermoplastic is used for pipes and fittings?
Rigid PVC
Polythene
Polypropylene
Flexible PVC
Which plastic material cannot be softened again once it has been hardened?
Thermoplastic
Thermosetting plastic
Polythene
Polypropylene
What is the result of reheating quench-hardened steels to a specific temperature and re-quenching?
Metal becomes softer
Metal becomes harder
Metal becomes tougher and less hard
Metal becomes brittle
What is the most common number in a data set called?
Mean
Median
Mode
Range
