9189 - Phase 2 - Unit 303 - Scientific Principles

Describe an alloy.

• Very light metal
• Mixture of two or more metals
• Aluminium
• Metal specifically used for electrical fittings

What is the specific gravity of butane in relation to air?

• 0.6
• 1
• 2
• 1.5

What material is a sacrificial anode typically made of?

• Magnesium
• Lead
• Copper
• Aluminium

Name the process of protecting steel from rusting, by coating it with a thin layer of zinc.

• Dezincification
• Electrolysation
• Galvanisation
• Oxidisation

What is the scientific name given for the rainwater cycle?

• Urban
• Hydrological cycle
• Water cable
• H2O

When water is turned into steam, approximately, how much will be produced from 1m3 of water?

• 10m3
• 16m3
• 160m3
• 1,600m3

What numbers identify the pH of pure water on the potential hydrogen scale?

• 12
• 1
• 6-7
• -273

At what temperature is water when it's most dense?

• -10 degrees Celsius
• 0 degrees Celsius
• 2 degrees Celsius
• 4 degrees Celsius

How is acceleration measured in SI units?

• Miles per hour
• Metres per second
• Metres per second squared
• Metres per minute cubed

Which SI unit determines the flow rate of a hot water tap?

• l/m
• g/m
• l/s
• m/s