Certification Exam question with correct
answers
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2026 INSTANT DOWNLOAD PDF
1. What is the primary energy source in an electric vehicle (EV)?
A. Diesel
B. Hydrogen combustion
C. Battery electrical energy
D. Petrol
Correct: C
Electric vehicles rely on stored electrical energy in high-voltage battery packs.
2. Which component converts DC battery power to AC for the motor?
A. Converter
B. Inverter
C. Alternator
D. Rectifier
Correct: B
The inverter changes DC from the battery into AC for the traction motor.
3. What is the typical high-voltage range in EV systems?
,A. 12–24V
B. 48–96V
C. 100–600V+
D. 5–10V
Correct: C
Most EVs operate at several hundred volts for efficiency and power delivery.
4. What safety equipment is essential when working on EVs?
A. Rubber boots only
B. Insulated gloves
C. Sunglasses
D. Steel-toe shoes only
Correct: B
Insulated gloves protect against high-voltage electric shock.
5. What does BMS stand for in EV systems?
A. Battery Management System
B. Brake Monitoring System
C. Battery Motor Supply
D. Boost Motor System
Correct: A
The BMS monitors battery health, temperature, and charge balance.
6. What is the function of regenerative braking?
A. Increase fuel use
B. Convert kinetic energy into electrical energy
C. Reduce battery size
D. Heat brake pads
, Correct: B
It recovers energy during braking and stores it in the battery.
7. Which motor type is most common in modern EVs?
A. DC brushed motor
B. Induction or permanent magnet motor
C. Steam turbine
D. Series motor only
Correct: B
Induction and permanent magnet motors are efficient and reliable.
8. What is the purpose of a DC-DC converter in EVs?
A. Increase fuel pressure
B. Step down high voltage to 12V systems
C. Convert AC to DC
D. Charge external devices only
Correct: B
It powers low-voltage accessories from the high-voltage battery.
9. What color is commonly used to identify high-voltage cables?
A. Blue
B. Black
C. Orange
D. Green
Correct: C
Orange insulation indicates high-voltage safety circuits.
10. What is the first step before servicing an EV?