Charging infrastructure and technologies – MCQs – EE

1. The main function of an EV charging station is to:
(A) Store electrical energy
(B) Supply electrical energy to recharge EV batteries
(C) Convert AC to DC for grid operation
(D) Provide mechanical power

2. The three main types of EV charging are:
(A) AC slow, AC fast, and DC fast charging
(B) Solar, wind, and thermal charging
(C) Home, office, and mobile charging
(D) Plug-in, wireless, and hybrid charging

3. Level 1 charging typically uses:
(A) 120V AC single-phase supply
(B) 240V AC three-phase supply
(C) 400V DC supply
(D) 48V DC supply

4. Level 2 charging commonly uses:
(A) 12V DC supply
(B) 240V AC single- or three-phase supply
(C) 400V DC supply
(D) 1000V AC supply

5. Level 3 or DC fast charging operates typically at:
(A) 120V DC
(B) 240V AC
(C) 400–800V DC
(D) 24V DC

6. The typical power range of DC fast chargers is:
(A) 1–2 kW
(B) 3–7 kW
(C) 50–350 kW
(D) 10–20 W

7. The standard connector used for DC fast charging in Europe is:
(A) CHAdeMO
(B) CCS Combo 2
(C) Type 1
(D) GB/T

8. The CHAdeMO standard was developed in:
(A) USA
(B) Japan
(C) Germany
(D) China

9. The CCS (Combined Charging System) supports:
(A) Only AC charging
(B) Only DC charging
(C) Both AC and DC charging through one port
(D) Wireless charging only

10. The Type 2 connector is commonly used in:
(A) North America
(B) Europe
(C) Japan
(D) China

11. The Type 1 connector is primarily used in:
(A) Japan and North America
(B) Europe
(C) China
(D) India

12. The main communication protocol used between EV and charger is:
(A) CAN bus
(B) PLC (Power Line Communication)
(C) RS-232
(D) Wi-Fi

13. The onboard charger in an EV converts:
(A) DC to AC
(B) AC from the grid to DC for the battery
(C) Mechanical to electrical energy
(D) DC to mechanical power

14. Smart charging infrastructure allows:
(A) Controlled and optimized charging based on grid conditions
(B) Random charging of vehicles
(C) Manual switching only
(D) Unregulated energy flow

15. The term V2G stands for:
(A) Voltage to Grid
(B) Vehicle to Grid
(C) Voltage to Generator
(D) Vehicle to Garage

16. In V2G technology, the EV:
(A) Only draws energy from the grid
(B) Can supply stored energy back to the grid
(C) Uses energy for internal lighting
(D) Operates independently of the grid

17. Wireless charging for EVs is based on:
(A) Capacitive coupling
(B) Inductive power transfer
(C) Optical transmission
(D) Direct conduction

18. The main disadvantage of wireless EV charging is:
(A) Lower efficiency compared to plug-in charging
(B) High maintenance
(C) Complex cabling
(D) Limited charging safety

19. The smart grid supports EV charging by:
(A) Disconnecting power
(B) Balancing load demand dynamically
(C) Blocking charging at night
(D) Disabling communication

20. The main benefit of fast charging stations is:
(A) Reduced grid load
(B) Shorter charging time for EVs
(C) Increased energy losses
(D) Smaller battery life

21. The OCPP protocol in EV charging stands for:
(A) Open Charging Point Protocol
(B) Over Current Protection Protocol
(C) Operational Charging Power Process
(D) Online Communication Protocol Platform

22. A home EV charger is usually rated between:
(A) 1–2 kW
(B) 3–22 kW
(C) 50–100 kW
(D) 200–400 kW

23. Public DC fast chargers are typically installed:
(A) In homes only
(B) On highways and public stations
(C) In factories
(D) Near water reservoirs

24. The main challenge in EV charging infrastructure is:
(A) Grid capacity and standardization
(B) Motor design
(C) Tire wear
(D) Vehicle aerodynamics

25. Battery swapping stations are used to:
(A) Replace discharged batteries with charged ones
(B) Repair damaged batteries
(C) Store excess energy
(D) Recycle old cells

26. The efficiency of conductive EV charging is typically:
(A) 50–60%
(B) 70–80%
(C) 90–95%
(D) 100%

27. The efficiency of wireless EV charging is approximately:
(A) 40–50%
(B) 60–70%
(C) 80–90%
(D) 100%

28. The charging infrastructure that integrates renewable sources like solar energy is called:
(A) Hybrid Charging Station
(B) Renewable-integrated EV Charging Station
(C) Mechanical Charging Unit
(D) Passive Charging Network

29. Bidirectional chargers are essential for:
(A) V2G and V2H applications
(B) High-speed AC charging
(C) Only battery protection
(D) Motor control

30. The future of EV charging infrastructure focuses on:
(A) Smart grids, high-power DC charging, and wireless systems
(B) Manual charging only
(C) Reducing grid integration
(D) Elimination of communication systems