Electrical (A6)Câu 65 / 120
A fully charged 12-volt lead-acid battery at rest should read approximately:
a.10.5 volts
b.11.8 volts
c.13.8 volts
d.12.6 volts
Giải thích
A healthy, fully charged 12-volt battery reads about 12.6 volts open-circuit at rest. Around 12.4 is roughly 75 percent, and 12.0 is about 25 percent charged. A surface charge should be removed before testing for accuracy.
Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Using Ohm's law, a 12-volt circuit with 4 ohms of resistance will carry a current of:
- Technician A says a voltage-drop test across a battery cable can reveal unwanted resistance. Technician B says a voltage-drop test is more accurate than a visual inspection for finding poor connections. Who is correct?
- Technician A says the charging system voltage at the battery with the engine running should typically be around 13.5 to 14.5 volts. Technician B says it should read exactly 12.6 volts while running. Who is correct?
- Two 6-ohm resistors connected in parallel produce a total resistance of:
- An open in a series circuit will cause:
- A starter that cranks slowly, with the battery known good and fully charged, most likely has:
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