Surface treatments and finishes (AQA GCSE Design and Technology): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What do surface treatments protect electronic and mechanical components against?
What do surface treatments protect electronic and mechanical components against?
Heat, dirt, moisture, and wear
What materials are used in PCB lacquering?
What materials are used in PCB lacquering?
Polymers and specialised lacquer materials
What is the primary purpose of PCB lacquering?
What is the primary purpose of PCB lacquering?
Prevent short circuits from metal strands
Why is PCB lacquer particularly valuable in aerospace applications?
Why is PCB lacquer particularly valuable in aerospace applications?
It is virtually weightless
What is a critical safety hazard when using PCB lacquer?
What is a critical safety hazard when using PCB lacquer?
It is highly flammable
What is the fundamental role of lubrication in mechanical systems?
What is the fundamental role of lubrication in mechanical systems?
Reducing friction between moving parts
What does viscosity represent in lubricants?
What does viscosity represent in lubricants?
A fluid's resistance to flow
Which statement about viscosity is correct?
Which statement about viscosity is correct?
Water has low viscosity
In oil viscosity grading (e.g., 20W or 10W), what do lower numbers indicate?
In oil viscosity grading (e.g., 20W or 10W), what do lower numbers indicate?
Thinner oils
What is grease composed of?
What is grease composed of?
Oil combined with thickening agents
What happens to the solvent in dry lubricants after application?
What happens to the solvent in dry lubricants after application?
It evaporates leaving a lubricating film
Which factor must be considered when selecting lubricants for mechanical systems?
Which factor must be considered when selecting lubricants for mechanical systems?
Load that bearing surfaces must carry