Electrical (A6)Question 76 of 120
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?
a.Neither A nor B
b.Technician A only
c.Technician B only
d.Both A and B
Explanation
A relay uses a low-current coil to close contacts that carry a high-current load, which protects switches and permits smaller control wiring. Both technicians are correct. Common uses include headlights, fuel pumps, and cooling fans.
Practice all 120 questions free — no signup required.
Related questions on this topic
- 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?
- 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?
- Excessive AC ripple voltage measured at the battery with the engine running usually indicates:
- Dim headlights that brighten when engine rpm increases most likely indicate:
- A voltmeter is connected how, relative to the component being tested?
- The gauge or module that displays engine coolant temperature relies on a sensor whose resistance:
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against ASE Automobile Certification Series (A1–A8) · How we review