Electrical (A6)第 74 / 120 题
Technician A says a diode allows current to flow in only one direction. Technician B says alternators use diodes to rectify AC into DC. Who is correct?
a.Technician A only
b.Technician B only
c.Neither A nor B
d.Both A and B
解析
A diode conducts in one direction only, and the alternator's diode (rectifier) bridge converts the stator's AC into the DC the vehicle uses. Both statements are correct. A shorted or open diode causes low output and AC ripple on the charging system.
免费刷完整 120 道题库 — 无需注册。
同考点相关题目
- A parasitic (key-off) battery drain is measured by connecting an ammeter:
- In a wiring diagram, a component shown connected to ground provides:
- Technician A says a fuse that blows again immediately after replacement indicates a short to ground or an overload. Technician B says repeatedly replacing the fuse will fix the circuit. Who is correct?
- Excessive AC ripple voltage measured at the battery with the engine running usually indicates:
- Technician A says a relay lets a small control current switch a larger load. Technician B says relays protect switches and allow smaller control wiring. Who is correct?
- Dim headlights that brighten when engine rpm increases most likely indicate: