Week 4, Chapters 5 and 6 - Diesel Schematics and Practical Electrical Flashcards
Which of the following designates the throttle position sensor on a schematic or pictorial diagram?
a. TPS
b. APPS
c. EFPA
d. All of the above
d. All of the above
Wiper motors use which two types of force?
Centrifugal and Positive Displacement
Checking current while the circuit is connected is the purpose of ________.
Back-probing
The best tool to check the complete intake manifold air temperature circuit is a ________.
Scan tool
Which system do automotive horns and speakers use to operate?
Electromagnetism
When the DMM is set to measure DC voltage and is connected in parallel to a load device, what is the obtained reading called?
Voltage drop
A device does not work at all. The best tool for QUICKLY checking the capacity of the 12V supply circuit is a ________.
Test lamp
What controls the grounding of a device or actuator?
ECMs
A 16 AWG wire is best used for:
a. Low-current circuits
b. Battery main feeds
c. Computer data lines
d. 16-amp circuits
a. Low-current circuits
Larger mm² wire numbers mean ________ ________ capacity.
higher current
Larger AWG wire numbers mean ________ ________ capacity.
lower current
The wire color “bl” means ________.
Blue
Some schematics include circuit numbers. Thier function is to:
a. Indicate the total number of circuits in the system
b. Improve the tracing of the circuit through the schematic
c. Provide a reference where the circuit definition can be found
d. Both B and C
b. Improve the tracing of the circuit through the schematic
If a wire crosses over to the next page of the schematic and the wire’s label changes from an 18-gauge black wire to a 16-gauge black wire, what does this most likely indicate?
A typographical error
Technician A says that a pictorial diagram offers the most information for troubleshooting an electrical circuit. Technician B says that if a device is off aand has 12V present at the input terminal, you can conclude that the power circuits are okay. Which technician is correct?
Neither Technicians A nor B
When using a voltmeter, the black side should be connected to which side of the circuit or component?
The ground side
Which component is used for frequent temporary overloads?
Circuit breakers
Fuses are rated by ________ capacity.
Current
True or False?
Connect the DMM with the circuit power off.
True
A DMM, using the ammeter function, should always be connected in ________ to the ________ device.
Series, Load
When using the ohmmeter function of the DMM to check continuity, what does an “O.L” in the display mean?
An open circuit
When using an ammeter, the red lead should be connected to which side of the connector?
Closest to the positive side of the battery
When using an ohmmeter, the leads should be placed ________ with the circuit or component being tested.
in parallel
The tail lamps, license plate lamps, and parking lamps are generally protected by what:
a. A Type-I circuit breaker
b. A Type-II circuit breaker
c. A 20-amp fuse
d. Three fusible links
c. A 20-amp fuse
Because headlamps are an important safety feature, they are protected by:
a. Heavy fuses
b. Fusible links
c. Type-I circuit breakers
d. Type-II circuit breakers
c. Type-I circuit breakers
Turn signal flasher units supply a rapid on-off-on current flow to the turn signal lamps by acting very much like ________.
circuit breakers
Horn relays are sometimes included in the horn circuit to ________ the amount of current needed to activate the horn.
decrease
The ________ switch within the wiper motor ensures that when the motor is turned off, the wiper arms will be brought to the bottom position.
Park
For easy identification, ground wires on most AUTOMOTIVE electrical systems are coded which color>
Black
Technician A says that when the driver pushes the horn button, electromagnetism moves an iron bar inside the horn, which opens and closes contacts in the horn circuit. Technician B says that many vehicle horn circuits include a relay. Which technician is correct?
Both Technicians A and B
Technician A says that the windshield washer pump draws a cleaning solution from a reservoir and forces it through nozzles onto the windshield. Technician B says the unit can be a positive-displacement pump or a centrifugal pump. Which technician is correct?
Both Technicians A and B
Two technicians are discussing horn operation. Technician A says when the horn switch or horn relay contacts close, current flows through the horn coil to ground. The electromagnetic field created by the coil attracts the armature also moving the diaphragm. Technician B says the armature movement closes the contact points, which opens the coil circuit. Which technician is correct?
Technician A only
