GCSE_Unit 5C_Working with Metal

This question is about recycling. Which one of the following statements is true?

• Metals can only be recycled a finite number of times

• Metals must be separated from other materials to be recycled

• Metal recycling is more expensive than mining and refining ore

• Blast furnaces are used to recycle metals

Which one of the following is a suitable finishing technique for use with metal?

• Refining

• Turning

• Brazing

• Galvanizing

Metals are commonly extracted from the earth in the form of ore . Iron ore is taken to a refinery where it is fed into a blast furnace. Explain the process by which the iron is separated from the ore.

Evaluate responses using AI:

OFF

The iron from the furnace is very brittle when cooled.

State what causes the iron to be brittle?

• Very High Carbon Content

• Very low carbon content

• high carbon content

Briefly explain how the iron is further refined in order produce steel?

• The carbon content is reduced

• The carbon content is increased

• further quantities of other metals

  are added

• It is mixed with other metals

Metals are available in a wide range of standardised stock forms.

What are the four dimensions you must consider when ordering box

section steel and what key requirements of the design must you consider?

• depth x width x wall thickness

• Length x Width x Height

• Wall thickness x Thickness x depth

Metals are available in a wide range of standardised stock forms. Suggest Two key requirements of the design that you must consider?

Evaluate responses using AI:

OFF

Metals are available in a wide range of standardised stock forms. Select two advantages of using standardised sized materials

• A wide variety of materials, components, tools, fittings and fixtures use the same standardised measurements and so are not compatible with one and other.

• Designers, architects and engineers can design and plan knowing what sizes are available to them.

• Manufacturers can ensure they use compatible machinery and components.

  Makes ordering easier.

• Manufacturers can make them all the time

What term is given to describe the coarseness of the thread on a screw, bolt or threaded rod?[

• Pitch

• Gauge

• Thread

Scientific instruments like the microscope below require fine adjustment.

The table or ‘stage’ on a microscope can be moved up and down using a fine adjustment knob. This uses a mechanism inside the body of the microscope called a ‘screw jack’ which raises or lowers a threaded rod connected to the stage.

Specify the material and type of thread required for the 'screw jack' in the microscope. Justify your answer?

Evaluate responses using AI:

OFF