SI Units in Plumbing and Domestic Heating

Which SI unit is used to measure velocity?

• m/s

• N

• Pa

• l/s

If a plumbing system has a flow rate of 5 l/s, what does "l/s" stand for?

• Litres per second

• Litres per square metre

• Litres per hour

• Litres per newton

Force is best described as:

• The rate at which an object changes its position

• The amount of fluid that flows through a pipe

• An influence on an object that may cause it to move

• The rate at which an object increases its velocity

Which of the following is measured using two dimensions?

• Area

• Volume

• Pressure

• Force

If a cistern base measures 0.8m by 1.0m, what is the area?

• 0.8 m²

• 1.8 m²

• 0.08 m²

• 1.0 m²

How many dimensions are used to measure the volume of a cistern?

• Three

• Two

• One

• Four

Explain the difference between how area and volume are measured in the context of a cistern.

• Area uses two dimensions (length and width), while volume uses three dimensions (length, width, and height).

• Area uses three dimensions, while volume uses two.

• Area and volume are both measured using only one dimension.

• Area and volume are both measured using four dimensions.

What happens to the body of water when the tap is closed, according to the diagram?

• The body of water is at rest.

• The water flows rapidly.

• The water evaporates.

• The water freezes.

What is the SI unit of pressure?

• Newton

• Joule

• Pascal

• Watt

If a cistern holds 40 litres of water, what is the total mass of the water in kilograms?

• 40 kg

• 4 kg

• 400 kg

• 20 kg