Exam 16: General Electrical System Diagnostics and Service

What does the scope's trigger do?

High resistance in a circuit causes decreased current flow.

Technician A says fuses and other circuit protection devices normally wear out. Technician B says to avoid future problems, replace a bad fuse with a higher ampere-rated fuse. Who is correct?

The wave form of constant DC voltage on a lab scope is a _____.

What are the four major parts (areas)of a digital multimeter?

A voltage drop test is performed to find unwanted ____________________.

The most common way to check a variable resistor is with a(n)____________________.

The best method for testing wires and electrical connections is a(n)_____.

An analog oscilloscope can freeze a captured signal for close analysis.

You are wiring a vehicle for a trailer hitch. The trailer will have eight parking lamps. Each parking lamp uses a 6 watt light bulb. What size fuse should be used to supply power for the parking lamp circuit? (Assume that the normal operating voltage is 14 volts.)

How does an inductive amps probe measure current without touching any wires in the circuit?

What are three ways to check a fuse?

A switch that is in the closed position should not have more than 300 millivolts voltage drop between input and output terminals.

Taking electrical measurements from the external wire terminal ends on the outside of a plugged-in electrical connector is called ____________________.

An electrical ____________________ is a diagram used to troubleshoot a circuit.

Duty cycle is measured in ____________________.

A technician is diagnosing the cause of an insufficient heat problem. He/She notices the fan is working but not providing much air flow. He/She disconnects the fan power feed wire and connects the fan to the battery using a fused jumper wire. The specification for the fan motor is 16 amps. His/Her ammeter shows 26 amps when the fan is jumped directly to the battery. What could be the problem?

A conventional ammeter is always connected in ____________________ with the circuit.

Sensor problems are being discussed. Technician A says small amounts of unwanted resistance in a low voltage sensor circuit will not have a significant effect on the vehicle's performance. Technician B says a poor ground in the reference voltage circuit can cause higher than normal readings at the computer. Who is correct?

When setting up a lab scope to measure a waveform that ranges from 0 to 15 volts; if there are eight vertical divisions, what must the voltage level be set at to display the entire waveform?