Exam 16: General Electrical System Diagnostics and Service

When a circuit protection device [fuse, circuit breaker] opens due to higher than normal current, a short is the likely cause.

When testing the high-voltage circuits on a hybrid vehicle, a _____type meter and test leads must be used.

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?

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

Connecting an ohmmeter into a live circuit can damage the meter.

____________________ solder is used to repair electrical wiring.

A potentiometer [type of variable resistor] can be tested with all the following tools EXCEPT:

Connecting an ohmmeter to a live circuit usually results in damage to the meter.

Analog meters should not be used to test electronic components.

Technician A uses a voltmeter to check circuit resistance. Technician B uses an ohmmeter to check circuit resistance. Who is correct?

An ohmmeter can be used to check for continuity.

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

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

Oscilloscopes are being discussed. Technician A says the vertical positions represent time. Technician B says the horizontal positions represent voltage. Who is correct?

All types of circuit protection devices can be checked with an ohmmeter or test light.

DMMs that can measure temperature use a _____ adapter that is placed on or near the object to be checked.

Voltage drop testing is being discussed. Technician A connects the red voltmeter lead to the most positive side of the circuit being tested and the black lead to the most negative side or part of the circuit being tested. Technician B says the test must be conducted with the circuit operating with normal amounts of current. Who is correct?

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

What are three ways to check a fuse?

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?