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Worksheets6035 | Scientific Principles | Quiz 5
Total questions: 25
Worksheet time: 13mins
A cold water storage cistern contains 250 litres when filled to its working capacity. If the base of the cistern measures 600 mm by 1200 mm, what pressure will be exerted by the cistern on the base beneath it?
1765 N/m²
2542 N/m²
3406 N/m²
3740 N/m²
Which of the following components is manufactured from a pure metal?
22 mm end feed elbow
Double panel, single convector radiator
Lead-free solder
15 mm type A compression coupling
Which of the following statements describes the ductility of a material?
It's ability to be stretched without breaking
It's ability to conduct heat
It's ability to resist atmospheric corrosion
It's ability to return to it's original shape once released from tension
If 0.150 m³ of water were heated beyond its boiling point, what volume of steam would be produced?
0.150 m³
150 m³
0.240 m³
240 m³
What is the unit of heat?
Joules
Watt
Kelvin
Ampere
What size of earthing cable should be used to bond gas and water mains pipework?
4 mm²
6 mm²
8 mm²
10 mm²
When different metals are present together in a system of pipework, which of the following types of corrosion is likely to occur?
Erosion
Oxidic
Atmospheric
Electrolytic
In an old hot water system that does not use a pump, how is heat transferred from the boiler to the cylinder?
Conduction
Convection
Impulse
Radiation
How does water grip the side of a beaker or pipe?
Adhesion
Gravity
Cohesion
Convection
Which of the following materials is used because it is a good conductor of heat?
Copper
Steel
Lead
Plastic
What is the relative density of water?
1
9.81
10
3.14
At which of the following temperatures does water change state (latent heat)?
65°C
100°C
4°C
10°C
At what temperature is water at its most dense?
100°C
0°C
4°C
65°C
Which of the tappings will have the highest pressure?
A
B
C
D
On the system shown in the diagram, the distance from the cold water storage cistern to outlet A is 10.0 m which gives approximately 1 bar pressure. Approximately how far below the cistern has outlet B been installed?
3 cm
30 m
3 m
300 mm
What property of water is identified by using the pH scale?
Heat conductivity
Acidicity/alkalinity
Electrical conductivity
Specific heat capacity
How would you test a piece of material for it's tensile strength?
Squashing
Hitting
Pulling
Twisting
What is convection the result of?
Heat travelling through or along a solid
Differences in the density of a solid
Heat travelling through the air to a solid
Difference in the density of liquids and gases
What SI unit measures mass?
Kilograms
Kelvins
Square centimetres
Ampere
How can the freezing point of water be reduced?
Adding insulation
Adding glycol
Adding inhibitor
Adding alkalinity
If a cylinder were installed at a height of 3.5 m above the level of the lowest hot water outlet,
what head pressure will be provided at the outlet?
35 bar
3.5 bar
3.5 kPa
0.35 bar
Absolute zero is 0 Kelvin, what temperature is it in °C?
0°C
273°C
-273°C
100°C
If the vertical distance between the bottom of the cold water cistern and the tap is 16 m, what is the pressure at the tap in kilopascals?
16 kPa
1.6 kPa
160 kPa
1600 kPa
If a cistern in a roof space contains a volume of 100 litres of water and 1 litre = 1 kg, what is the force acting on the platform it is standing on?
100 N
9.81 N
981 N
1500 N
If an unvented system holds 150 litres of water and is heated to 54°C, what would the approximate capacity of water be after heated?
165 L
144 L
156 L
240,000 L
