Worksheets7290-602 Knowledge of Isolation & Re-energising HV systems
Total questions: 20
Worksheet time: 20mins
What type of electric vehicle uses a small engine to run a generator to maintain charge in the high voltage battery?
Extended range
Plug-in hybrid
Mild hybrid
Fuel cell
What does term BEV stand for?
Basic electric vehicle
Battery electric vehicle
Basic electronic vehicle
Battery electronic vehicle
Where can technical information for a mild hybrid be found?
Vehicle logbook
Internal job card
Manufacturer's website
Component instructions
How are high voltage cables most likely identified?
By their colour
By their location
By their sectional area
By their insulation material
What is the name of the government body that issues guidelines on working with electric vehicles?
Driver and Vehicle Standards Agency
Economic Commission for Europe
Health and Safety Executive
Department for Transport
Where are isolation safety procedures located?
Component manufacturer's leaflet
Vehicle manufacturer's information
Health and Safety Executive guidance
Driver and Vehicle Licensing Agency website
Why is it important to follow the manufacturer's guidance when connecting an auxiliary power source to an electric vehicle?
To maintain the supplier's vehicle warranty
To reduce the risk of battery thermal runaway
To prevent damage to the vehicle electrical systems
To increase the amperage output at the starter motor
What does this warning sign alert people to?
High voltage
Magnetic field
Corrosive acid
Oxidising agent
What action should be taken to minimise the risk to colleagues when working on an electric vehicle?
Report on the company job card
Inform the workshop manager
Place barriers around the vehicle
Contact the vehicle manufacturer
What should be the first action taken if a loose connection on a high voltage cable is discovered?
Make the vehicle electrically safe
Remove the high voltage battery
Contact the vehicle manufacturer
Tighten the high voltage component
What component retains high voltage when the vehicle is switched off?
Auxiliary battery
Main relay
Capacitor
Heater
What high voltage electrical component creates a magnetic field that can cause damage to a pacemaker?
Air conditioning compressor
DC-to-DC converter
Lithium-ion battery
AC traction motor
Where can technical information on isolating a high voltage system be found?
Internal company intranet
Electricity at work regulations
Health and Safety Executive guidance
Vehicle manufacturer's website
What piece of equipment is used to check for residual voltage after carrying out the isolation procedure?
Code reader
Power probe
Voltage meter
Insulation tester
Why must a multimeter be calibrated before use?
To ensure accurate reading
To show static electricity reading
To check the internal battery voltage
To monitor the range display movement
What must be the first action taken before isolating the high voltage system?
Contact vehicle manufacturer
Place signage on windscreen
Connect vehicle to a fast charger
Prepare a risk assessment
What is the recommended procedure for checking residual voltage after isolating the vehicle?
Read live data battery voltage
Test insulation on high voltage cables
Check voltage close to capacitors
Monitor amperage across the inverter outputs
Why is it important to evaluate an electric vehicle after re-energising the high voltage system?
To maintain the manufacturer's warranty
To check all relevant software updates are correct
To calibrate the maximum electric motor output
To ensure the correct operation of the vehicle
Using the information in the table, what battery cells are not within the manufacturer's tolerance?
A and D
B and D
C and E
E and A
Which of the following is the most important reason for ensuring a high voltage system is returned to manufacturer's specification before handing the vehicle back to the customer?
To retain the company's image
To maintain the vehicle's reliability
To reduce the risk of electric shocks
To minimise the number of breakdowns
