WorksheetsThe Seven Base Units
Total questions: 77
Worksheet time: 46mins
What is the base unit for length?
metre
kilogram
second
ampere
What is the base unit for mass?
kilogram
gram
pound
ounce
What is the base unit for time?
second
minute
hour
day
What is the base unit for electric current?
ampere
volt
ohm
watt
What is the base unit for temperature?
kelvin
celsius
fahrenheit
rankine
What is the base unit for light?
candela
lumen
lux
watt
What is the base unit for the amount of substance?
mole
gram
liter
second
Examples of day-to-day tasks when you have used units of measurement include:
Cooking recipes
Measuring height
Calculating distance
All of the above
Approximately what length is the waste pipe in millimetres?
480mm
500mm
450mm
520mm
What is this measurement in metres?
0.48m
0.50m
0.45m
0.55m
What is the diameter of the waste pipe?
41mm
32mm
50mm
60mm
What is mass defined as?
The amount of matter in an object
The weight of an object
The volume of an object
The density of an object
What is the weight of a 10kg mass on Earth?
The weight of a 10kg mass on Earth is approximately 98.1 Newtons.
The weight of a 10kg mass on Earth is approximately 10 Newtons.
The weight of a 10kg mass on Earth is approximately 100 Newtons.
The weight of a 10kg mass on Earth is approximately 9.8 Newtons.
Which of the following is true about weight?
Weight is the same as mass.
Weight is the downward force created as gravity pulls an object towards Earth.
Weight is measured in kilograms.
Weight does not change with location.
What is an electrical current?
Current is measured in Coulombs per second, which is known as the ________.
Ampere
Volt
Ohm
Watt
What is the symbol for ampere?
What is the SI unit of electrical resistance?
Ampere
Volt
Ohm
Watt
Fill in the blank: Electrical resistance is measured in ______ (Ω).
ohms
volts
amperes
watts
What is the degree of hotness or coldness of a body or environment expressed in terms of?
Celsius and Fahrenheit
Celsius and Kelvin
Kelvin and Fahrenheit
Fill in the blank: The Celsius scale uses increments of 1 degree and has a zero point at which water freezes, which is ____ °C.
0
100
32
-273
What is the temperature called that corresponds to the point at which all molecular motion would stop?
Absolute zero
Freezing point
Boiling point
What is the unit of water pressure?
Pascal
Newton
Joule
Watt
If the pressure exerted by a water main is 300 kilopascals (kPa), it will balance a column of water about how many meters high?
10m
20m
30m
40m
Fill in the blank: 10m of head = _______ kPa.
100
50
75
125
What is the pressure in bar if the cistern is 8m above the outlet?
0.8 bar
1.2 bar
0.6 bar
0.4 bar
Convert the pressure into kPa.
100 kPa
200 kPa
300 kPa
400 kPa
What is the metric unit of capacity that is equal to 1,000 cubic centimetres?
Gallon
Litre
Pint
Quart
In plumbing, a litre can be used to measure the volume of water in a cold-water storage vessel (CWSC) or even the flow rate at the outlet of a tap. True or False?
True
False
Fill in the blank: 1,000 litres = 1 tonne = 1m³ of volume (approx.)
Derived units are just a combination of one or more measurements. For example, velocity is length (metres) divided by time (seconds). Which of the following is an example of a derived unit?
Metre
Second
Newton
Ampere
Measure the (a) of a floor space in m³.
Calculate the ______ of a CWCS in m³.
volume
area
length
width
Measure the ______ rate of water at a hot tap in L/s.
flow
temperature
pressure
volume
Assess the ______ of lead roof sheeting in kg/m³.
density
volume
mass
thickness
Refer to British Standards when designing pipework to achieve the correct flow ______ rate in m/s.
velocity
pressure
temperature
volume
What is velocity?
The rate at which an object changes its position
The rate at which an object increases its velocity
The force acting on an object
Velocity is measured in ______.
metres per second (m/s)
kilograms (kg)
litres (L)
newtons (N)
Acceleration due to gravity is ______.
9.81m/s² downwards toward the ground
5m/s² upwards
15m/s² sideways
0m/s²
What is the base SI unit for measuring area (length × width)?
cubic metre
square metre
litre
What is the symbol for the base SI unit of volume (length × width × height)?
m²
m³
l
Fill in the blank: The base SI unit for volume of liquid (length × width × height × 1000) is _______.
litre
gallon
pint
quart
What is the symbol for velocity in SI units?
m/s
m/s²
kg/m³
Fill in the blank: The base SI unit for acceleration is metre per second (a) .
What is the base SI unit for density?
kilogram per cubic metre
cubic metre per kilogram
newton
Fill in the blank: The symbol for specific volume in SI units is _______.
m³/kg
kg/m³
L/kg
cm³/g
What is the base SI unit for force (mass (kg) × acceleration (m/s²))?
pascal
newton
joule
Fill in the blank: The base SI unit for pressure is _______.
pascal (N/m²)
bar
atmosphere
torr
What is the symbol for energy, work, quantity of heat in SI units?
W
J
V
Fill in the blank: The base SI unit for power is _______.
watt
joule
newton
pascal
What is the symbol for electric resistance in SI units?
V
Ω
W
What is the maximum density of water per cubic metre at 4°C?
1000 kg/m³
958 kg/m³
915 kg/m³
What happens to the density of water when the temperature is either raised or lowered from 4°C?
It increases
It decreases
It remains the same
At 100°C, what is the density of water?
958 kg/m³
1000 kg/m³
920 kg/m³
980 kg/m³
When water is turned to steam, how many times does it expand?
1600 times
1000 times
800 times
2000 times
What happens to water from 4°C to 99°C according to the diagram?
A) Water contracts by 4%
B) Water expands by 4%
C) Water remains the same
D) Water expands by 10%
At what temperature does ice expand by 10% according to the diagram?
0°C
-10°C
5°C
-5°C
According to the diagram, steam expands how many times?
1,000 times
1,600 times
2,000 times
1,200 times
What are the imperial units for measuring length?
Inch
Meter
Kilogram
Liter
What are the SI units for measuring weight?
Newton (N)
Kilogram (kg)
Pound (lb)
Gram (g)
Before decimalisation in 1971, every measurement in the UK was in which system?
Metric
Imperial
SI
European
After 1971, which units of measurement did the UK adopt?
Imperial
Metric
European
Customary
Convert 10 kilopascals (kPa) to pounds per square inch (psi).
1.42 psi
0.95 psi
2.5 psi
1.0 psi
Convert 20 kilopascals (kPa) to pounds per square inch (psi).
2.84 psi
1.45 psi
3.92 psi
5.80 psi
Convert 30 kilopascals (kPa) to pounds per square inch (psi).
4.27 psi
3.5 psi
5.0 psi
6.2 psi
Convert 40 kilopascals (kPa) to pounds per square inch (psi).
5.68 psi
4.50 psi
6.00 psi
7.25 psi
Convert 50 kilopascals (kPa) to pounds per square inch (psi).
7.11 psi
5.00 psi
10.00 psi
12.00 psi
Convert 100 kilopascals (kPa) to pounds per square inch (psi).
14.22 psi
10.00 psi
20.00 psi
5.00 psi
Convert 150 kilopascals (kPa) to pounds per square inch (psi).
21.33 psi
15.00 psi
30.00 psi
10.00 psi
Convert 200 kilopascals (kPa) to pounds per square inch (psi).
28.44 psi
25.00 psi
30.00 psi
35.00 psi
Convert 250 kilopascals (kPa) to pounds per square inch (psi).
35.55 psi
30.00 psi
40.00 psi
25.00 psi
Convert 300 kilopascals (kPa) to pounds per square inch (psi).
42.66 psi
30.00 psi
50.00 psi
60.00 psi
Convert 350 kilopascals (kPa) to pounds per square inch (psi).
49.77 psi
50.00 psi
45.00 psi
55.00 psi
Convert 400 kilopascals (kPa) to pounds per square inch (psi).
56.88 psi
50.00 psi
60.00 psi
45.00 psi
Convert 450 kilopascals (kPa) to pounds per square inch (psi).
63.99 psi
50.00 psi
70.00 psi
80.00 psi
Convert 500 kilopascals (kPa) to pounds per square inch (psi).
71.10 psi
50.00 psi
100.00 psi
65.00 psi
What is the gas rating unit used on a modern G4 gas meter?
m³/h
ft³/h
liters/h
gallons/h
