WorksheetsPPT 6 Electrical Supplies and Equipment Identification Quiz
Total questions: 40
Worksheet time: 20mins
What is the minimum current and voltage combination that can be lethal to a human?
50 milliamps and 50 volts
100 milliamps and 100 volts
10 milliamps and 10 volts
200 milliamps and 200 volts
Which factors affect the lethality of electricity?
Age, body mass, and health
Height, weight, and diet
Temperature, humidity, and altitude
Speed, distance, and time
What is the typical supply voltage in a dwelling that makes electricity dangerous?
230 volts
110 volts
50 volts
400 volts
What should be considered before carrying out any electrical task?
The cost of the equipment
The relevance of PPE for the task
The color of the tools
The brand of the tools
What is recommended for electrical work to offer protection in case of faults?
Non-insulated tools
Insulated screwdrivers and tools
Metal tools
Wooden tools
What does the use of insulated tools NOT mean?
You are expected to work on live equipment
You have protection in case of faults
You should follow risk assessments
You need to consider general PPE
What should be considered for tasks involving pipework systems?
The color of the pipes
The general PPE suitable to the environment
The length of the pipes
The brand of the pipes
According to the Electricity at Work Regulations, what must be done to circuits on which engineers work?
Circuits should be made dead.
Circuits should be left live.
Circuits should be partially live.
Circuits should be disconnected.
When is live work on circuits permitted according to the regulations?
When it is not practical for the circuit to be dead.
When it is convenient for the engineer.
When the circuit is new.
When the circuit is old.
What does the rule about testing imply regarding working on live circuits?
Engineers cannot work on live circuits just because it is inconvenient to turn off the supply.
Engineers can work on live circuits if they are in a hurry.
Engineers can work on live circuits if they have permission.
Engineers can work on live circuits if they are experienced.
Before isolating a circuit, what should be checked regarding others?
They are not affected by the electrical isolation
They are aware of the circuit design
They have the necessary tools
They are wearing protective gear
What should be ensured about essential plant and equipment before isolating a circuit?
They are turned off
They are not affected
They are labeled
They are disconnected
What should be done for people who may be affected by electrical isolation?
Provide them with a map
Give them enough warning
Offer them training
Supply them with tools
What type of temporary equipment should be supplied if necessary during electrical isolation?
Mobile heaters and battery powered lighting
Generators and transformers
Circuit breakers and fuses
Insulated gloves and boots
What is the first step in the safe electrical isolation procedure?
Test the voltage tester
Identify the circuit
Lock off the supply
Post notices in appropriate places
Why is it important to ensure that the test circuit is dead?
To save time
To prevent electrical shock
To increase voltage
To reduce noise
What should be done after locking off the supply in the safe electrical isolation procedure?
Identify the circuit
Test the voltage tester
Keep the key with you
Isolate the circuit
Which of the following is NOT part of the safe electrical isolation procedure?
Make sure the test voltage instrument works
Ensure the test circuit is dead
Increase the circuit voltage
Post notices in appropriate places
What is the first step in the safe electrical isolation procedure?
Prove the device is working on a proving unit
Locate and identify circuit or appliance
Select an approved voltage indicating device
Identify means of isolation
What should you do if the voltage indicator is not working on a known supply?
Begin work
Replace or repair
Identify means of isolation
Fit warning cables if required
How can you ensure isolation during the procedure?
By switching off
By increasing voltage
By connecting to a live circuit
By using a higher voltage device
Which standard must the test meter be approved to?
HSE GS38
ISO 9001
ANSI Z535
OSHA 1910
What type of equipment is recommended for testing without the need for a battery?
Dedicated voltage indicator
Multimeter
Electrical indicator screwdriver
Digital voltmeter
Why are electrical indicator screwdrivers not approved?
They are too expensive
They are not reliable
They have potential for incorrect measurement
They require a battery
Why is it important to prove a test instrument before use?
To ensure it is safe and reliable
To save time during testing
To avoid using a manual
To increase the instrument's lifespan
What should be used to prove a test instrument is working properly?
A multimeter
A proving unit
A battery tester
A circuit breaker
How can an engineer test if an instrument is functioning properly?
By checking the battery level
By inserting the probes into the test points
By turning the instrument on and off
By reading the instruction manual
What is the first step in isolating a circuit or appliance?
Identifying the correct circuit or appliance
Turning off the main power supply
Checking the voltage levels
Consulting the user manual
What might be required if the circuit or appliance is in service?
A safety inspection
Permission
A new circuit breaker
A voltage check
What does each MCB in a consumer unit serve?
A shared circuit
A dedicated circuit
Multiple circuits
A temporary circuit
What needs to be established after identifying the circuit?
The voltage level
The means of isolation
The circuit diagram
The power consumption
What is the purpose of selecting a suitable device to lock off the source in plumbing and domestic heating?
To ensure the source is securely isolated
To increase water pressure
To enhance heating efficiency
To reduce energy consumption
What should be done after securing the lock-off device?
Increase the temperature
Add a warning notice and retain the key
Turn on the water supply
Remove all safety equipment
What is the purpose of using a multi-hole clasp in a lockout procedure?
To allow multiple operatives to work on the same system with individual keys.
To increase the security of the lockout system.
To reduce the number of keys needed for the lockout.
To ensure only one operative can access the system at a time.
What additional protection does safe isolation provide besides preventing electrical shock?
Prevents injury from mechanical movement.
Ensures faster completion of tasks.
Reduces the need for personal protective equipment.
Increases the efficiency of the system.
What is the first step to confirm that the power has been isolated?
Check from live (phase) to earth.
Check from neutral to earth.
Check from live (phase) to neutral.
Check from earth to live (phase).
What should all tests confirm when checking for isolation?
0 volts
5 volts
10 volts
220 volts
What is the final stage before carrying out your work ?
Recheck the voltage indicator
Test the water pressure
Inspect the gas lines
Check the temperature settings
What is recommended to use for rechecking the voltage indicator?
GS38 approved proving unit
A standard multimeter
A household battery
A light bulb
Is testing on a known live source recommended?
No, it is not recommended
Yes, it is always recommended
Only if the voltage is low
Only if the source is new
