WorksheetsChemical Interactions in Engineering
Total questions: 13
Worksheet time: 14mins
Which of the following best describes an atom?
The smallest particle of a substance that can exist independently.
A substance made of two or more types of atoms chemically bonded.
A combination of substances not chemically bonded.
A positively charged particle within the nucleus.
An element is:
A substance that can be broken down into simpler substances.
A substance made up of only one type of atom.
A mixture of different compounds.
A chemical reaction product.
What is a molecule?
The smallest particle of a compound that can exist independently.
Two or more atoms bonded together.
Both A and B.
A single atom.
A compound can be defined as:
A combination of substances that are not chemically bonded.
A substance formed when two or more elements are chemically bonded.
A type of mixture used in engineering.
An unstable form of an element.
What is a mixture?
A substance made from one element.
Two or more substances physically combined but not chemically bonded.
Two or more elements chemically bonded.
A single pure compound.
Which of the following best describes chemical etching?
The process of heating a metal to change its hardness.
The controlled removal of material using chemical reactions.
The coating of metal with another element.
The use of electrical current to remove material.
Surface finishing processes that use chemical reactions are primarily used to:
Reduce the weight of components.
Improve appearance, corrosion resistance, and wear resistance.
Increase electrical conductivity.
Weaken the material for recycling.
Which statement about bonding in engineering applications is correct?
Bonding always uses mechanical fasteners.
Chemical bonding can be achieved using adhesives that form molecular links between surfaces.
Bonding has no chemical basis.
It relies only on pressure and temperature.
William is working in a car repair shop and needs to maintain the engine parts. Why does he apply oils and lubricants to the moving components?
Encourage oxidation reactions.
Reduce friction and prevent wear between moving parts.
Strengthen metal bonds.
Remove surface coatings.
During a high-risk chemical manufacturing process, Isla is responsible for overseeing the mixing of various substances. Why must Isla carefully manage and control the chemical interactions and reactions?
To save time and reduce labour costs.
To ensure consistent product colour.
To prevent hazardous reactions, explosions, or contamination.
To make the process more efficient only.
Explain how chemical etching is used in engineering to produce detailed or precise components.
Describe how chemical bonding is used in adhesive joining compared with mechanical fastening.
Give one example of a chemical reaction that must be controlled in an engineering workshop and explain why control is important.
