Hot Forming Processes (Junior Cert Engineering): Quizzes
📚Quizzes
Practise the questions
15 questions from this quiz
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Practise the questions
15 questions from this quiz
What is the key advantage of forgework over cutting metal from a block?
What is the key advantage of forgework over cutting metal from a block?
Grain structure follows the shape
Why are gas forges particularly suitable for school workshops?
Why are gas forges particularly suitable for school workshops?
They produce less smoke and dirt
What material is the anvil made from?
What material is the anvil made from?
High carbon steel
Why should you never chisel on the hardened face of the anvil?
Why should you never chisel on the hardened face of the anvil?
It can damage the anvil and tools
What is the bick on an anvil used for?
What is the bick on an anvil used for?
Forming curves and eyes
Which tongs are best for gripping thin materials?
Which tongs are best for gripping thin materials?
Close mouth tongs
What does drawing down do to a metal bar?
What does drawing down do to a metal bar?
Reduces area, increases length
How do you prevent 'piping' when creating a point?
How do you prevent 'piping' when creating a point?
Start blunt and work backwards
What is the formula for mean diameter?
What is the formula for mean diameter?
What colour should steel be heated to for hardening?
What colour should steel be heated to for hardening?
Cherry red
What tempering colour is needed for cold chisels?
What tempering colour is needed for cold chisels?
Dark straw (240°C)
How should metal be cooled during annealing?
How should metal be cooled during annealing?
Very slowly in sand or lime
What is the key difference between annealing and normalising?
What is the key difference between annealing and normalising?
The cooling rate used
How is the leg vice different from a regular bench vice?
How is the leg vice different from a regular bench vice?
Bolted to bench and floor
What is the melting point of tin/bismuth alloys used in school casting?
What is the melting point of tin/bismuth alloys used in school casting?
138°C