GOLA NO 3

Select the correct equation to calculate the linear expansion within a 10m length of copper pipe if it was heated by 30⁰C.

• 3.14 x 10 x 30

• 10 x 30 x 0.000016

• 30 / 10 x (0.000011)

• 4.18 x 30 x 10

Which of the following materials expands the most?

• PVC

• Copper

• Steel

• Brass

What is the correct calculation to determine the volume of a cylinder?

• 3.14 x radius2 x height

• Diameter / height x (3.14)2

• 3.14 x diameter x height

• 3.14 x diameter2

An electrical immersion heater is required to provide 36,000kJ of heat energy to heat a cylinder. What is the power of the immersion heater if it raises the temperature of the water to its design temperature within one hour?

• 10 watts

• 10Kw

• 100 watts

• 100kW

What is the SI unit for force?

• Pascal

• Joule

• Bar

• Newton

How can pressure be defined?

• Force divided by area

• Force multiplied by area

• Area divided by force

• Volume multiplied by force

Which of the following examples of pipe installation would result in the best flow rate?

• 3m of 15mm pipework with five pulled bends

• 3m of 22mm pipework with five elbows

• 3m of 15mm pipework with five elbows

• 3m of 15mm pipework with five elbows

State the accepted cold water storage requirements for single dwellings

• For hot and cold storage it is 200 litres minimum;

• For hot and cold storage it is 230 litres minimum;

• for cold only it is 110 litres minimum

what are the requirements are for storage cisterns over 1,000 litres.

• No requirements

• fitted with a warning and overflow pipe

• Adequate provision for inspection and cleaning;

What is the minimum distance between the invert levels of the warning and overflow pipes?

• 25mm

• 25cm

• 50cm

• 50mm