Exam 3: Electrical and Electronic Componentsbasic Electrical Troubleshooting and Service

In a PNP transistor both the base and the collector must be negative in respect to the emitter for current to flow through the emitter to the collector.

A(n) ____ is designed to turn off the system whenever excessive current or an overload occurs.

Technician A says you may replace a fusible link with a larger gauge wire. Technician B says a burned-out fuse indicates a larger-rated fuse should be used. Who is correct?

The frame of the vehicle is normally attached to the negative battery post.

The leads of a DMM with a diode check function are placed across the terminals of a diode and then reversed. A 0.6 volt reading is obtained in both directions. Technician A says this means the diode is shorted. Technician B says this means the diode is acceptable. Who is correct?

Switches are the least common means of providing control of electrical current flow to an accessory.

To use a transistor as a simple solid-state relay, what conditions must occur?

A(n) ____ resistor has two or more fixed resistor values.

Technician A s ays both an ohmmeter and a self-powered test light may be used to test for continuity. Technician B says both may be used to test fuses. Who is correct?

What electronic device functions as a one-way check valve that allows current to flow in one direction only?

How are fuses rated?

What are transistors frequently used as?

Describe how to locate a short to ground that causes the fuse to blow.

A voltmeter placed across the terminals of an inoperative electric window motor indicates 12 volts when the window switch is depressed. Technician A says the window ground circuit may be faulty. Technician B says the window power feed circuit may be faulty. Who is correct?

A ____ is a conductor with a special heat-resistant insulation.

Technician A says to test fuses you could use a voltmeter or a test light. Technician B says a voltmeter and a test light are connected in parallel. Who is correct?

Technician A says a stepped resistor should be disconnected from the circuit before testing it with an ohmmeter. Technician B says that a relay may be tested while it is connected to the circuit. Who is correct?

Throttle position sensors are variable resistors with two wires attached.

What does excessive current flow in a circuit cause?

The greatest advantage of a digital storage oscilloscope (DSO) is the ____ at which it samples electrical signals.