DC Chargers Quiz

What is the function of Power Factor Correction (PFC) in DC chargers?

• To reduce Total Harmonic Distortion (THD) and improve efficiency

• To increase vehicle speed

• To charge battery faster

• To prevent battery overheating

What does the 'Water Pressure' represent in the CC-CV Water Filling charging analogy (Like- Water Tank = Charger)?

• Voltage

• Current

• Power

• Battery capacity

True or False: Lithium-ion batteries are best charged using high current at all times.

• True

• False

• Depends on weather

• Only for new batteries

What happens if high current is applied to a deeply discharged lithium-ion battery?

• It charges faster and cooler

• It may overheat, short circuit, or even explode

• Nothing unusual happens

• Battery performance improves

Which of the following is a benefit of CC-CV (Constant Current - Constant Voltage) charging?

• Increases battery size

• Safe, quick, and efficient charging

• Slows down charging

• Decreases power factor

Which statement best describes the Matrix Switch system?

• Converts DC to AC

• Selects the correct output connection for charging

• Detects ground fault

• Measures battery voltage only

For pre-charge/discharge circuits in DC applications, which relay is typically used?

• G5Q

• G9KB-E

• G7EB

• G2RG-X

What is the purpose of the G3VM solid-state relay in EV chargers?

• Mechanical switching

• Ground fault detection and signal switching

• Battery thermal monitoring

• AC power supply regulation

Which OMRON relay is suitable for replacing traditional AC contactors handling up to 1000V and 300A?

• G6K

• G6QG

• G9KA-E

• G5Q

What is a key benefit of replacing bulky contactors with OMRON's relay-based solutions like G7EB?

• Increased charging time

• Space-saving, Cost-saving & silent operation

• Reduced voltage capacity

• Higher THD