Plumbing Science lvl 2 mock exam

What is the chemical formula for water?

• H2O

• CO2

• O2

• H2SO4

Why is it rare to find pure water?

• Water is a weak solvent.

• Water is a very powerful solvent.

• Water is a solid at room temperature.

• Water is a gas at room temperature.

What can water do given enough time?

• Freeze, melt, evaporate

• Erode, corrode, absorb

• Boil, condense, solidify

• Expand, contract, dissolve

What happens to water when it is heated to temperatures up to 100°C?

• It contracts by 4%

• It expands by up to 4%

• It turns into ice

• It remains unchanged

When water exceeds 100°C, what transformation occurs?

• It turns into ice

• It evaporates and contracts

• It turns to steam and expands

• It remains liquid

By how much can water expand when it turns to steam at temperatures exceeding 100°C?

• 100 times its original volume

• 500 times its original volume

• 1,600 times its original volume

• 2,000 times its original volume

What is the standard unit for measuring temperature when considering the effect of heat on a space or object?

• Fahrenheit

• Kelvin

• Celsius

• Rankine

How is an increase in temperature often measured?

• Fahrenheit

• Kelvin

• Celsius

• Rankine

What is the equivalent of 0 Kelvin in Celsius?

• -273°C

• 0°C

• 273°C

• 100°C

Which of the following statements is true about Celsius and Kelvin increments?

• Celsius increments are larger

• Kelvin increments are larger

• Celsius and Kelvin increments are the same

• Kelvin increments are smaller