WorksheetsHybrid and Electric L 2/3
Total questions: 30
Worksheet time: 15mins
In the event of a HV battery acid spill onto a person’s skin what action should be taken?
Use powdered boric acid dissolve in water
Soak the person in cold water
Seek medical attention
When working on a HV vehicle, what is the first practical item you should do?
Test and fit all PPE
Control the working area with the correct safety signs
Remove the keys from the vehicle and place over two meters away from the vehicle
What is the third step when preparing a vehicle for safe working?
Switch of the engine
PPE
Disconnect the negative low voltage 12volt battery lead
Thermal runaway is also called thermal explosion, this process is also known as?
Hydro thermic reaction
Exothermic reaction
Electrical reaction
Which is the most important battery in a hybrid vehicle?
The HV battery pack
The LV battery
he key fob battery
these batteries have been connected together in.....
Parallel
Series
A combination of parallel and series
What type of magnets are used in motor/generators, that are 18 times stronger that normal magnets?
Bi-polar magnets
Neodymium magnets
Exothermic magnets
In the case of a person being electrocuted, and you cannot turn off the power supply, what type of equipment should be used to help out with this situation?
A none conductive item
A conductive item
Due to the high voltage DO NOT attempt any procedure
What is the most common type of HV charging plug used in Europe?
When regenerative braking is taking place in an EV, what type of voltage is created by the generator?
AC power
DC voltage
Both AC and DC power
The air conditioning pump used on an EV, what voltage will be supplied to this to run it?
HV DC voltage
LV DC voltage
HV AC power
What voltage should you have at the inverter after the ten minutes waiting time?
High voltage
Zero voltage or close to this number
AC 125 volts
What level of voltage would you expect to find on an electrically propelled vehicle?
50 volts to 100 volts
100 volts to 850 volts
0 volts to 100 volts
What is most harmful, Voltage or Amps?
Volts
Volts and Amps
Amps
When does voltage become hazardous? i.e. voltage level.
40 volts DC and 20 volts AC
50 volts AC and 120 volts DC
10 volts DC and 60 volts AC
What is the category rating for PPE in regards of rubber gloves?
Double zero
Zero
Zero plus
What is the minimum CAT rating for a multimeter?
CAT II
CAT I
CAT III
What is the main type of electric motor used in an EV?
DC brushless
AC brushless
AC brushed
What is the flow description of power from the HV battery to the HV motor when accelerating, and back to the HV battery when regenerative braking is taking place?
AC volts to DC volts, AC volts to DC volts
DC volts to DC volts, DC volts to DC volts
DC volts to AC volts, AC volts to DC volts
What precautions should be taken when placing an EV or hybrid vehicle in a spray booth?
Remove the HV service plug
Disconnect the 12volt battery
Remove the HV battery pack
Why are the cables of an EV of hybrid orange in colour?
To stand out for looks
Caution of high voltage
Low resistance leads
Three phase EV and hybrid motors can be electrically constructed (wired) in either a Delta’ or ‘Wye’ (Star) configuration. Which is the most common type in EVs and hybrids?
Delta
Wye
Star
Which of the following is correct for an EV system?
ICE, HV battery pack, Invertor, Electric motor
Invertor, Electric motor, HV battery pack
ICE, MG1 and MG2, HV battery pack
When does regenerative braking happen?
Accelerating
Braking
Stationary
How are electrical motors rated?
Volts
Amps
Watts
When looking at an EV electric motor, you see three seperate orange cables attached to a component, what are these?
High Voltage 3 phase cables
Low Voltage Live and earth
High Voltage Single-phase cables
Can the AC compressor be part of the HV system?
Yes
No idea
No
After a vehicle repair what should be the final item you do?
Replace the service plug to the HV battery
Check the DC to DC charger
Road test the vehicle
When recovering an EV or a hybrid vehicle, what precautions should be taken?
Never towed under any circumstance
The vehicles driven wheels must be on the ground to help support the vehicle
The vehicles driven wheels must be raised from the ground to stop rotation of these wheels, to prevent any form of regeneration of electricity
What is the most common type of electrical motor used in EVs and hybrids?
DC brushed motor
AC brushless permanent magnet synchronous motor
AC brushed electrical motor
