WorksheetsElectrical Engineering Quiz
Total questions: 33
Worksheet time: 17mins
How much current would flow in a circuit having 10 Ω resistance and a 230 V supply?
23 A
10 A
15 A
30 A
How much current would be drawn by a 3 kW, 230 V water heater?
13.0 A
10.0 A
15.0 A
20.0 A
Which non-statutory document gives 'Requirements for Electrical Installations'?
BS 7671
BS 1234
BS 4321
BS 6789
What does RCD stand for?
Residual Current Device
Random Circuit Device
Reactive Current Device
Rotational Circuit Device
What is a common rating of circuit breaker used to protect a 230 V, 3 kW immersion heater radial circuit?
32 A
20 A
25 A
40 A
What class of electrical power tools require a connection to the earth of a socket outlet?
Class I
Class II
Class III
Class IV
What is a proving unit used for when undertaking safe and secure isolation of an electrical supply?
To prove the voltage is disconnected
To increase the voltage
To decrease the voltage
To measure the current
What wording should be on the label attached to a bonding clamp?
Safety Bond
Danger High Voltage
Earth Connection
Do Not Remove
What are the identification colours of the two conductors connected to the micro-switch within a zone valve?
Red and black
Blue and brown
Green and yellow
White and grey
What device is used to monitor ambient air temperatures in a heating system?
Barometer
Hygrometer
Room thermostat
Anemometer
Which of the following is part of the safe isolation process?
Turning on the power supply
Using a voltage tester to confirm the circuit is de-energized
Removing warning notices
Connecting additional circuits
What are the three main parts of a cable?
Conductor, Insulation, Sheath
Core, Cover, Shield
Wire, Plastic, Metal
Fiber, Coating, Jacket
What does IP54 indicate about the ingress protection of electrical equipment?
Protected against dust ingress (level 5) and water spray from any direction (level 4)
Protected against complete water immersion
Protected against high-pressure water jets
Protected against oil and gas ingress
What is the typical content of methane within natural gas?
50%
75%
85%
95%
What is the calorific value of propane?
50 MJ/m³
75 MJ/m³
85 MJ/m³
95.8 MJ/m³
Which grade of fuel oil is most suitable for use with domestic oil burners?
C1
C2
C3
C4
Which coal type has the highest heat content (kW/kg)?
Bituminous
Anthracite
Lignite
Sub-bituminous
At what distance should an oil storage tank for a heating appliance be positioned away from a wooden fence if the tank is not concealed within a fire-rated barrier?
0.5 m
1.0 m
1.5 m
1.8 m
Select the correct formula for the complete combustion of natural gas:
CH4 + O2 = CO2 + H2O
CH4 + 2O2 = CO + 2H2O
CH4 + 2O2 = CO2 + H2
CH4 + 2O2 = CO2 + 2H2O
The section of an open flue which provides the initial draught is known as what?
Secondary flue
Tertiary flue
Primary flue
Auxiliary flue
What is the minimum angle of change in direction within an open flue?
45°
30°
60°
90°
An appliance which takes its air directly from outside through the same flue assembly used to discharge products of combustion and does not rely on a fan is known as:
Closed flued natural draught
Balanced flue
Open flued natural draught
Sealed combustion
Which of the following is most likely to indicate incomplete combustion of a high efficiency gas appliance?
Blue flame
Yellow flame
No flame
Green flame
What is the primary component of air by percentage?
Oxygen (O2): Approximately 21%
Nitrogen (N2): Approximately 78%
Argon (Ar): Approximately 0.9%
Other trace gases: Less than 1%
What is the purpose of a draught diverter in open flued appliances?
To increase the temperature
To prevent backdraughts
To reduce noise
To enhance combustion
What is the minimum height of a flue terminating above a flat roof with a parapet for an appliance rated at 28 kW?
300MM
600MM
900MM
1200MM
What is the purpose of a spillage test?
To check for water leaks
To ensure proper venting of combustion products
To measure air quality
To test appliance efficiency
The air source heat pump works on the principle of:
Conduction
Convection
The refrigeration cycle
Radiation
Which of the following areas CANNOT be supplied by harvested rainwater?
Irrigation
Food preparation
Toilet flushing
Laundry
Which one of the following is NOT a style of pipework loop for a ground source heat pump?
Horizontal loop
Vertical loop
Spiral loop
Rounded loop
If you work on refrigeration pipework, what regulation must be followed?
F-Gas Regulations
Water Regulations
Electrical Safety Regulations
Building Regulations
Prior to installing a solar thermal system on a roof line, which one of the following is NOT a location consideration that must be considered?
Roof orientation
Roof pitch
Style of the roof tiles
Shading
Which one of the following can grey water be used for?
Drinking
Cooking
Washing clothes (after additional processes)
Bathing
