Auto Final Exam
Grommet
If a wire is fed through a metal body panel, a rubber what should be installed to protect the wire from abrasion
True
If more than one circuit component does not work, start your test at the power source for the circuit
True
In the metric size system, wire diameter increases as the size number increases
Ohmmeter
If a transistor tester is not available what can be
Amps
Current is measured in units called
Junction block
A __ allows several wires to make a common connection
Power distribution
A __ diagram shows how a battery current is fed two major components
Analog
A ____ Multi meter uses a needle or pointer to show electrical readings
Scan tool
A ____ is used to measure computer system operating voltage and interpret onboard trouble codes
Circular mill
A _____ equals the area of a circle that has a 0.001 diameter
Multi meter
A _____ is a voltmeter, ammeter, and ohmmeter combined in one housing
Intermittent
A ______ problem is when that occurs only under certain conditions
Resistance
A carotid or burned a connector terminal is the most common cause of high circuit
Voltage
A circuit power test light uses the circuit what to illuminate the tester bulb
False
A conventional ammeter must be connected in parallel with the circuit
Free ranging
A digital meter that automatically selects the appropriate scales is described as
Resistance
A good conductor has little or no white across it's terminals
Extremely high current
A hot wire short to the ground produces what
1/4 mile
A late model auto Mobile may contain more than ___ wire to link electrical/electronic components
True
A multi meter with an inductive pick up does not have to touch the metal components of a circuit
A only
A particular diode has a reading of infinite homes in both directions. Technician a says this indicates that the diode has an internal short. Technician B says this indicates the diode is in good condition. Who is right
True
A remote ground has an extra wire running from the circuit to the ground
1000
A resistance value of 1 kilohm is equal to how many ohms
Wire harness
A set of several wires wrapped in tape or enclosed in a plastic sheath is referred to as a what
Primary
A small diameter wire that carries a low DC voltage is called a what wire
B only
A vehicle keeps blowing it's fuse to the lighting system. Technician a says that a larger amp fuse might correct the trouble quickly and easily. Technician B says that installing a larger fuse could cause a serious electrical fire. Who is right
Voltage
A voltmeter can be used to check a resistors what
Solder
Alloy with a low melting point
True
An AC volts setting on a multi meter might be used to check signals from a speed sensor
False
An ammeter is a device for directly measuring the resistance of a circuit
True
An ohmmeter is the most accurate way of checking a variable resistor
Infinite
An open switch should show ____ resistance
Short
Before replacing a fusible link you must locate and repair the what that caused the link to open
Ground
Before testing a capacitor, you should always ____ the capacitor and lead
Test light
Continuity tester
True
Circuit powered test lights are more commonly used than self powered test lights in auto repair
Glow plug analyzer
Diesel engine test tool
Solvent
Electrical what can be used to clean oil and grease from components before soldering
Noid light
Electronic fuel injector tester
True
Fluorescent shop lights with smaller diameter is well give off more light and use less power
Rosen core
For electrical work, only ___ solder should be used
Electrical tape
Heat shrink tubing is an alternative to ____ for covering exposed soldered connections
Blown
If a test light globes only on the feed side of a fuse the test light is what
False
Modern load tester is required connecting the tester leads in series with the battery cable to measure current
B only
More than one component in a particular automotive electric circuit is not working. Technician a starts testing the circuit at its load. Technician B starts testing the circuit at the power source. Who is right
True
Most circuit problems are caused by something very simple, such as a broken wire
VOM
Multi meter
Infinite resistance
On an ohm meter display, the symbol (infinity) indicates
False
Powertrains of hybrid vehicles may operate at voltages of 1000V or more
True
Printed circuits are most often used in instrument panels of vehicles
Trial and error
Randomly testing or replacing system parts until the problem is found is called the what approach
False
Secondary wire refers to all vehicle circuit that are not part of the ignition system
Lead
Silver, tin silver, or tin copper solders are considered safer to use than tin ____ solder
Low
Soldered connections have a _______ resistance
False
Soldering a crimp connector is considered a poor practice
True
Soldering is the best method of joining wires and terminals
Both a and B
Technician A says a load tester can be used to check the condition of a vehicles battery. Technician B says a load tester can be used to check the condition of a vehicle starting system. Who is right
Neither A nor B
Technician a says and inductive wire tracer generates a DC voltage in the wiring being tested. Technician B says and inductive wire tracer checks for high current load in the circuit. Who is right
Both a and B
Technician a says wiring spices are normally designated on automotive wiring diagrams buy a dot. Technician B says a G can be used on some schematics to designate ground. Who is right?
Neither a nor b
The current in an automotive tail light circuit needs to be checked. Technician a connects a conventional voltmeter in series with the circuit being tested. Technician B connects a conventional ammeter in parallel with the circuit being tested. Who is right
False
The effects of a grounded circuit are easily observed
High resistance
The four basic types of circuit problems are open circuit, intermittent trouble, short circuit, and
Timing light
The quickest method of checking circuit continuity is the
False
The trial and error approach is a good alternative when trying to find a simple electrical problem
0.001
The unit mill, used to measure wire diameter, is equal to
False
To achieve an accurate reading, all ohmmeters must be recalibrated to zero before use
Systematic
To find the source of a problem quickly you should use what kind of approach
Fuse link
To protect wiring before it gets to the fuse block a what is installed
Capacitor
What electrical/electronic component stores and electrical charge
Closed switch
What is not A possible cause of an open circuit
Conductor resistance diagram
What is not a type of wiring diagram
Wire length
What is not important information conveyed by the wire code identification system
Luminosity timing meter
What tool is used when making a electrical test on a diesel engine
Oscilloscope
What tool measures voltage overtime?
Primary
What wire has color-coded insulation for ease in tracing circuits
Ohmmeter
When testing a switch which testing device would you use if the switch is removed or isolated from the circuit
Inductive wire tracer
Which testing device uses a signal generator to help locate a short
30
Wire gauges in an automobile generally range from gauge 0 to gauge ___?
True
Wire size is determined by conductor diameter and does not include the insulation
False
You should avoid wiggling or moving the wires while you were testing for shorts or opens
4
lowest resistance in ohms per 1000 feet