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WorksheetsLevel 3 Unit 305 Scientific principles Mock 2
Total questions: 41
Worksheet time: 21mins
The SI unit for measuring electrical current is:
Watt
Ampere
Joule
Ohm.
Specific heat capacity is measured in:
N/m2
0C or 0K
KJ/Kg/0C
Amperes.
What would an anti-capillary groove in a lead weathering stop?
Water being drawn into the building
Corrosion of the lead
The lead from sliding out of place
Expansion and contraction.
What has a sinusoidal wave form?
DC electricity
AC electricity
Convection heat transfer
Conductive heat transfer.
If a customer painted their central heating pipework, what would that protect it from?
Pitting
Electrolytic corrosion
Atmospheric corrosion
UV corrosion.
On an incoming mains, which of the following would have the lowest pressure?
The cold water tap at the kitchen sink
The float-operated valve to the cold water storage cistern in the loft
The first floor basin cold tap
The downstairs WC float-operated valve.
The build-up of limescale in a hot water system could be noticed by:
The hot water temperature being hotter
The hot water temperature being cooler
The hot water flow rate increasing
The hot water recovery time decreasing.
What is this symbol for?
DC Electricity
System circulator
Electrical resistance
AC electricity
Which of the following will cause syphonage to occur?
Suction at point C
Increase in pressure at point B
Suction at point A
Atmospheric pressure in the tube.
This form of corrosion is generally caused by:
Flux left in the tube after flushing out
The inhibitor in the system being too strong
Position of the electrolytic series table
Bad manufacture.
The energy used to heat 1 kg of water by 2ºC is 8.372 kJ. The specific heat value for water is
0.385 kJ / kg / ºC
4.186 kJ / kg / ºC
6.852 kJ / kg / ºC
8.372 kJ / kg / ºC.
Water has a relative density of?
0.5
1
1.5
2
At what temperature is limescale formed in temporary hard water?
65ºC
55ºC
45ºC
35ºC
0 Celsius is equal to?
-273 Kelvin
-327 Kelvin
-27 Kelvin
273 Kelvin
When ice is heated so rapidly that it changes from a solid to a gas, it is known as?
Sensible Heat
Saturation
sublimation
Latent heat
When water turns to steam it expands by?
10%
1600 times
4
4%
When water turns to ice it expands by?
10%
1600 times
4
4%
When water is heated it expands by?
10%
1600 times
4
4%
The maximum density of water is?
10
1600
4
0
The boiling point of water at 3 bar is?
120.42
100
133.69
143.75
The boiling point of water at 2 bar is?
120.42
100
133.69
143.75
When heat is applied to a liquid or gas and the liquid or gas increases in temperature.
Sensible heat
Latent heat
Convention
Conduction
Tiny particles are energised through the addition of heat and collide with each other, creating this movement that spreads through the object.
Convection
Conduction
Radiation
When heat transfers via infrared light, transferring heat from one body to another, without heating the space in between.
Convection
Conduction
Radiation
In order to calculate the amount of energy required to raise the temperature of a substance, we need to know its?
Watts
Specific Heat Capacity (SHC).
Joules
Linear expansion
To calculate the amount of linear expansion taking place in a material:
Expansion (cm) = Length (m) x ∆t (K) x Coefficient of linear expansion (m/m/k)
Expansion (m) = Length (m) x ∆t (K) x Coefficient of linear expansion (m/m/k)
Expansion (m) = Length (m) x ∆t (K) + Coefficient of linear expansion (m/m/k)
Expansion (m) = Length (m) + ∆t (K) + Coefficient of linear expansion (m/m/k)
Calculate the volume of a cylinder 0.9 m high by 0.5 m wide using the following formula
Volume = πr^2 x height
120 litres
177 litres
133 litres
190 litres
Given that all holes have the same diameter, the water pressure is greatest at hole
A
B
C
D
Relative density is the
Density of a substance divided by its volume
Density of a substance in comparison to the density of water
Density of water displaced when a substance is placed in water
Force exerted by the density of a substance
1. Atmospheric pressure at sea level is:
303.1Pa
201.3Pa
101.3Pa
111.3Pa
The energy used to heat 1 kg of water by 2ºC is 8.372 kJ. The specific heat value for water is
0.385 kJ / kg / ºC
4.186 kJ / kg / ºC
6.852 kJ / kg / ºC
8.372 kJ / kg / ºC.
Weight is calculated how?
weight = mass x gravity
Mas = weight x gravity
weight = mass - gravity
gravity = mass x weight
What is the SI Unit for time?
s
m
k
m/s
What is the SI Unit for thermodynamic temperature?
s
m
k
N
What is the SI Unit for current?
s
A
K
m
What is the SI Unit for mass?
k
s
A
kg
What is an alloy?
A mixture of plastics and metals
Metal derived directly from the ore
Thermosetting metal
A mixture of two or more metals
A ferrous metal...
Is prone to ferrous oxide
Is not prone to ferrous oxide
Can not be remoulded once set
Is impervious to heat transfer
Metals such as aluminium, chromium and zinc are more anodic metals than copper or gold. This means that they are more likely to suffer electrolytic corrosion and is represented by their placement in the...
Pop charts
Electromotive series
Mohs scale
Sacrificial anode scale
UV and heat damage is likely to weaken and deform which material the most?
Wood
Metal
Concrete
Plastic
Given that all holes have the same diameter, the water pressure is greatest at hole
A
B
C
D
