Scientific Principle Plumbing

How many times does the volume of

water increase by as it turns to steam ?

• 1100

• 1600

• 1500

• 10%

For a substance to float on water it must

have a relative density of less than ?

• 0.5

• 0.7

• 0.9

• 1.0

Reducing the diameter of pipework within a system with a constant supply pressure would lead to ?

• an increase in the speed of water after the pipe reduction

• a reduction in the pressure after the pipe reduction

• backpressure on the system at the highest point

• increase in the supply pressure at the lowest point

The SI unit for pressure is the Pascal (Pa). One Pascal is equal to ?

• 1 Bar

• 1 Gauge

• 1 N/m2

• 1 Kg/m3

1 bar pressure is equal to ?

• 101 N/m2

• 150 N/m2

• 1,000 N/m2

• 101,000 N/m2

What will happen if relative density is more than 1 ?

• Water Sinks

• Water Float

• Nothing happens

• The water changes colour

Limescale in hot water is caused by ?

• Temporary Hard Water

• Permanently Hard Water

• Salty Water

• Soft Water

Which of the following reflects a neutral pH ?

• 1

• 8

• 3

• 7

Water with a pH of 4 is regarded as ?

• Hard

• Soft

• Dry

• Alkali

Water falling on sandstone would be classed as ?

• Permanent Hard Water

• Soft Water

• Temporary Hard Water

• Alkali