Engineering Materials Quiz

What are the three primary bonds?

• Ionic, covalent, and metallic

• Hydrogen, ionic, and covalent

• Covalent, hydrogen, and Van der Waals

• Metallic, Van der Waals, and ionic

Explain the difference between a compound and a mixture.

• A compound is a substance made of two or more different types of atoms bonded together, while a mixture is a combination of two or more substances that are not chemically bonded.

• A compound is a blend of two or more substances, while a mixture is a new chemical substance.

• A compound can be separated by physical means, while a mixture cannot.

• A mixture has a fixed composition, while a compound's composition can vary.

What is the difference between a ferrous alloy and a non-ferrous alloy?

• A ferrous alloy contains iron, while a non-ferrous alloy does not.

• A non-ferrous alloy contains iron, while a ferrous alloy does not.

• A ferrous alloy is magnetic, while a non-ferrous alloy is not.

• A non-ferrous alloy is always lighter than a ferrous alloy.

Explain the difference between electric arc welding and MIG welding.

• Electric arc welding uses a consumable electrode, while MIG welding uses a non-consumable electrode.

• MIG welding uses a consumable electrode, while electric arc welding uses a non-consumable electrode.

• Electric arc welding is used for thicker materials, while MIG welding is used for thinner materials.

• MIG welding requires an inert gas, while electric arc welding does not.

Describe the process of addition polymerisation.

• Monomers join together without the loss of any atoms to form a polymer.

• Monomers join together with the loss of water molecules to form a polymer.

• Polymers are broken down into monomers through a chemical reaction.

• Monomers join together with the loss of carbon dioxide to form a polymer.

What is the main difference between a thermoplastic and a thermoset?

• Thermoplastics can be remolded, while thermosets cannot.

• Thermosets can be remolded, while thermoplastics cannot.

• Thermoplastics are more durable than thermosets.

• Thermosets are used in making smartphone screens, while thermoplastics are not.

What distinguishes glass from glass-ceramic?

• Glass-ceramic is less durable than glass.

• Glass is typically used in smartphone screens, while glass-ceramic is not.

• Glass-ceramic can withstand rapid temperature changes better than glass.

• Glass is a type of glass-ceramic.

What research task is suggested to understand the durability of Gorilla™ Glass compared to standard soda-lime glass?

• Investigate the chemical composition of Gorilla™ Glass and soda-lime glass.

• Conduct research to explain how Gorilla™ Glass makes a smartphone more durable.

• Compare the cost of Gorilla™ Glass to soda-lime glass.

• Research the history of Gorilla™ Glass and soda-lime glass.

What activity is proposed for understanding the structure of an item from around the house?

• Draw a pictorial freehand sketch and then a digital 3D model.

• Write a description of the item without drawing it.

• Draw a pictorial freehand sketch along with a front view and top view.

• Take a photograph of the item from the front and top.