Electrical (A6)Câu 66 / 120
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?
a.Technician A only
b.Both A and B
c.Technician B only
d.Neither A nor B
Giải thích
With the engine running, the alternator should raise system voltage to roughly 13.5 to 14.5 volts to charge the battery and run loads. A reading of 12.6 running would indicate the charging system is not working. Technician B describes a resting, not charging, voltage.
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?
- A fully charged 12-volt lead-acid battery at rest should read approximately:
- 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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