electrical I final
What is a GOOD test result when testing a diode? A voltage reading in one direction (500mv for example) and OL in the other direction A high voltage reading in one direction (3.500 volt for example) and a low voltage in the other direction (250mv for example) OL in both directions The tester will display GOOD at the end of the test
A voltage reading in one direction (500mv for example) and OL in the other direction
What is an advantage of a Digital Storage Oscilloscope? Signals are traced over time and allows the technician to see momentary defects Rapid glitches are displayed and are easily captured Extremely fast sampling rate All of these are advantages
All of these are advantages
What would cause a blown fuse in a parallel circuit that has 2 lamps? One of the branches has a burnt lamp There is a short to ground from the battery positive side of one of the lamps to ground There is a short to ground from the ground side of one of the lamps to ground Both of the lamps are burnt None of the answers would cause a blown fuse All the answers would cause a blown fuse
All the answers would cause a blown fuse
An ohmmeter measures continuity. True False
False
Open circuit voltage is most likely LESS than available voltage. True False
False
In order to check available voltage at a load the voltmeter is connected: In series In parallel, doesn't really matter how In parallel, with the black lead on the ground and the red lead on the battery positive In parallel, with the black lead on the ground and the red lead on the battery positive side of the load In parallel, with the red lead on the battery positive side of the load and the black lead on the side of the load OPPOSITE battery positive
In parallel, with the black lead on the ground and the red lead on the battery positive side of the load
To check voltage drop on a particular load the voltmeter is connected: In series In parallel, doesn't really matter how In parallel, with the black lead on the ground and the red lead on the battery positive In parallel, with the black lead on the ground and the red lead on the battery positive side of the load In parallel, with the red lead on the battery positive side of the load and the black lead on the side of the load OPPOSITE battery positive
In parallel, with the red lead on the battery positive side of the load and the black lead on the side of the load OPPOSITE battery positive
What must be done when checking a circuit for continuity? Ensure that the fuse is not blown Check for available voltage BEFORE checking for continuity Make sure all the connections in the circuit are secure (loose connections can cause a bad reading) Isolate the circuit or component to be measured (make sure there is no power)
Isolate the circuit or component to be measured (make sure there is no power)
What is significant about a molded connector? (Something that does not apply to hard-shell connectors) It can not be repaired, only replaced It allows the male and female to be separated It provides a stronger connection It's waterproof
It can not be repaired, only replaced
Before starting to determine what is wrong with a circuit what must a technician do first? Have a supply of parts ready Know what the correct operation of the circuit is Warm up the soldering iron Replace the fuses to see if that fixes the problem
Know what the correct operation of the circuit is
Match the battery with the characteristic Lead-Acid Vented No Maintenance (Maintenance Free) AGM
Lead-Acid: Most common automotive battery Vented: Can check and refill electrolyte (water) No Maintenance (Maintenance Free): Sealed battery AGM: Battery fluid is trapped in separators
In order to read high amperage such as a starter or alternator a technician needs to use: A multimeter with large gauge wires Any multimeter A current clamp connected to a multimeter in the volts port with the meter set to DC mV Any of these tools
A current clamp connected to a multimeter in the volts port with the meter set to DC mV
What happens if a technician attempts to check for battery voltage with the red lead in the A or mA port? If V is selected with the rotary knob it will function normally A fuse will blow and possibly damage the meter The meter will display WRG indicating the leads are in the incorrect ports Nothing
A fuse will blow and possibly damage the meter
Technician A says that solenoids can only do mechanical work such as opening a door lock or switching vacuum circuits. Technician B says that solenoids can do mechanical work as well as switch other circuits on and off such as a starter circuit. Which technician is correct? Technician A Technician B Both Technicians are correct Neither Technician is correct
Tech B
Technician A says that a short will lower a circuit's total amperage. Technician B says that a short can bypass a circuit load. Which technician is correct? Technician A Technician B Both Technicians are correct Neither Technician is correct
Technician B
Technician A says that the battery acts as a voltage stabilizer when the engine is off. Technician B says the battery provides energy to operate lights and accessories when the engine is off. Which technician is correct? Technician A Technician B Both Technicians are correct Neither Technician is correct
Technician B
When thinking about an ISO relay: Which statement is TRUE if the relay is energized? The circuit input at terminal 30 is connected to output terminal 87 The circuit input at terminal 87 is connected to output terminal 87A The circuit input at terminal 86 is connected to output terminal 87 The circuit at terminal 85 is connected to output terminal 87A
The circuit input at terminal 30 is connected to output terminal 87
If there were a short to ground before the last load but after two loads what would the results be? A blown fuse (assuming there is a fuse in the circuit) None of the lights would work The first two lights would not work and the third light would be brighter The first two lights would be brighter and the third light would be off No affect. The circuit would work as normal.
The first two lights would be brighter and the third light would be off
If an electrical signal is reading as 90% what does that mean? The signal is an analog signal and it is at 90% of the source voltage. The signal is a digital signal and it is on 90% of the time. The signal is a digital signal and it is off 90% of the time. This is not a method of measuring an electrical signal.
The signal is a digital signal and it is on 90% of the time.
Why does the AGM battery in a hybrid vehicle have a temperature sensor on it? The temperature sensor is there to improve the charging. The higher the temperature the more the vehicle will charge the battery to overcome the increase in resistance (Higher temperature = higher resistance) The temperature sensor is there as another monitor for the HVAC system The temperature sensor is there to limit charging at high temperatures to prevent damage to the battery There is no temperature sensor on the battery
The temperature sensor is there to limit charging at high temperatures to prevent damage to the battery
When the meter reads "O.L" what is the meter telling the technician? The tool is too powerful for the measurement The technician needs to select a lower range The tool or the selected range is not capable of measuring the value The battery is low
The tool or the selected range is not capable of measuring the value
When the meter reads "O.L" what is the meter telling the technician? The tool is too powerful for the measurement The technician needs to select a lower range The tool or the selected range is not capable of measuring the value The battery is low
The tool or the selected range is not capable of measuring the value
Electricity can be converted into __________ . motion light heat chemical energy electromagnetic force All of the above ONLY light and electromagnetic force None of the above
all of the above
What can cause the electrons from being "freed" from their atoms? (Thereby creating electricity) light chemical action heat friction magnetic force pressure All of the above None of the above
all of the above
What information is available on TIS regarding the Battery Diagnostic Station? Training Mode Detailed Instruction Manuals Stock Number Charts Software Updates All of the answers are correct
all of the answers are correct
How is current measured? With a voltmeter With an ammeter With an ohmmeter Current can not be "measured" it needs to be calculated from other measurements
ammeter
According to Ohm's Law: If the voltage in a circuit stays the same, the ____________ . amperage will go down if the resistance goes up amperage will go up if the resistance goes up amperage will stay the same, regardless of the change in resistance amperage will always go up if the resistance changes in any way
amperage will go down if the resistance goes up
If a wire is cut that means the circuit is now ... a shorted circuit. an open circuit. probably going to blow a fuse. shorted to power.
an open circuit
Technician A says that "Electromagnetic Interference" or "EMI" is a problem on vehicles with a lot of low-powered integrated circuits. Technician B says that "Induction" is the theory that is utilized in ignition coils. Which technician is correct? Technician A Technician B Neither Technician Both Technicians
both
Technician A says that a printed circuit board reduces the amount of wiring needed for a part. Technician B says that a printed circuit board is typically used for an instrument panel. Which technician is correct?
both
Technician A says that if a circuit is NOT complete (open circuit) there can not be any current in the circuit. Technician B says that if a circuit is NOT complete there can still be voltage (potential). Which technician is correct?
both
Technician A says that if a circuit is NOT complete (open circuit) there can not be any current in the circuit. Technician B says that if a circuit is NOT complete there can still be voltage (potential). Which technician is correct? Technician A Technician B Neither Technician Both Technicians
both
Technician A says that the Y axis (vertical) of a scope is the intensity (voltage) of the signal. Technician B says that the X axis (horizontal) of a scope is the time measured of the signal. Which of the technicians is correct? Technician A Technician B Both technicians are correct Neither Technician is correct
both
Technician A says that electrons tend to flow on the outside surface of conductors. Technician B says that a wire gauge number is determined by the diameter of the conductor, not including the insulation. Which technician is correct?
both tech are correct
Technician A says that a parasitic load can cause a battery to drain over time. Technician B says that a surface discharge can cause a battery to discharge over time. Which technician is correct? Technician A Technician B Both Technicians are correct Neither Technician is correct
both technicians are correct
Technician A says that a transistor can be NPN or PNP. Technician B says that a certain type of transistor can actually increase the voltage output. Which technician is correct? Technician A Technician B Both Technicians are correct Neither Technician is correct
both technicians are correct
Technician A says that an analog signal is an electrical signal that vary the voltage over a specific range over a period of time. Technician B says that a digital signal is a signal that has only two values, such as "on" and "off". Which technician is correct?
both techs are correct
The amount of voltage that a load or resistor consumes is called the __________ . consumption rate Kirchhoff's second voltage law voltage rise voltage drop
consumption rate
What causes a blown fuse? Excessive resistance Excessive amperage Extremely low voltage Extremely low amperage
excessive amperage
A circuit with a large diameter wire will have MORE resistance due to the large diameter of the wire. True False
false
The TOTAL circuit resistance on a SERIES circuit is _________ . higher than the highest individual resistor lower than the lowest individual resistor an average of all the resistors on the circuit never greater than the highest resistor on the circuit None of the answers are correct
higher than the highest individual resistor
Which of these is a good definition of voltage drop? How much voltage a battery has How much voltage a load consumes How much voltage there is available after a load How much voltage there is before a load
how much voltage a load consumes
An ammeter is connected: In series In parallel, doesn't really matter how In parallel, with the black lead on the ground and the red lead on the battery positive In parallel, with the black lead on the ground and the red lead on the battery positive side of the load In parallel, with the red lead on the battery positive side of the load and the black lead on the side of the load OPPOSITE battery positive
in series
Which of these factors has little affect on a conductor's ability to carry current. Insulation used on the conductor Material (what the conductor is made of) The gauge of the conductor How long the conductor is The temperature of the conductor All of the answers are correct
insulation used on a conductor
A capacitor is used to __________ . control the voltage in a circuit prevent the electrical charge from flowing backwards control amperage flow in a circuit protect the circuit from high-voltage spikes
protect the circuit from high-voltage spikes
A __________ typically is used to control fan speed. A variable resistor A capacitor A stepped resistor A lifting resistor None of the answers are correct
stepped resistor
Technician A says that analog meters should not be used on modern vehicles because of all the computer controlled circuits. Technician B says that you can use an analog meter on modern vehicles as long as you use an A/D converter adaptor to the test leads. Which technician is correct? Technician A Technician B Both Technicians are correct Neither Technician is correct
tech A
Technician A says that as long as there is an exchange from one atom to another of particles, that is considered to be electricity. Technician B says that one volt is required to move one ampere of current through one ohm of resistance. Which technician is correct? Technician A Technician B Neither Technician Both Technicians
tech B
Technician A says that ONLY loads such as lights or motors have resistance and components such as wires and switches DO NOT have resistance. Technician B says that a load can also be used to control current flow to devices. Which technician is correct? Technician A Technician B Neither Technician Both Technicians
tech b
What is the most significant indicator of a fuse's rating? The color The size The shape The material All of the answers are correct
the color
What do the bands on resistors indicate? The wattage The resistance The amperage The voltage None of the answers are correct
the resistance
A technician is testing a NO switch. When the switch is NOT activated the technician touches both sides of the switch with a test light and the light illuminates on both sides equally. What does this tell the technician about the switch? The switch is open The switch is shorted Nothing This is not a valid test
the switch is shorted
What does the LAST band on a resistor indicate? The tolerance The multiplier The voltage type (AC/DC) The limiter
the tolerance
Why is open circuit testing NOT the best method for testing a circuit? You can damage the circuit There is no load The tool to perform the test is very expensive Open circuit testing is not an actual test
there is no load
A material with a high number of electrons in the valence ring will have MORE resistance when considering the electrical flow. True False
true
High resistance before a load will create the same effect as high resistance after the load. True False
true
What would be an acceptable voltage drop across any ONE WIRE or CONNECTOR? 0.1 volt 1.0 volt 10% of the source voltage It depends on the connector or wire
0.1 volt
According to the 623 Toyota Technician Manual if the surface discharge test shows a reading higher than _______ the technician should clean the top of the battery. 0.05 volts 0.50 volts 0.01 volts 1.00 volts
0.50 volts
What is typical voltage drop across a relay or connector in a circuit? (As defined by 623 Toyota Technician Handbook) 10.00 volts 01.00 volts 00.10 volts 00.01 volts
00.10
Using Ohm's Law: Voltage is 12 volts Amperage is 12 amps What is the resistance? Answer with an exact number
1
A good conductor has how many electrons in the valence ring? 0 1-3 5-8 Depending on the ring. It should be at the maximum capacity for that ring
1-3
An 84 watt load is being installed. What is the appropriate amperage of circuit protection should be used? 2.5 amp 5 amp 10 amp it can not be determined with the information given
10 Amp
According to the 623 Toyota Technician Manual it may be necessary to wait _________ to ___________ to wait to test for a parasitic load.
10 minutes and 2 hours
According to the 623 Toyota Technician Manual it may be necessary to wait _________ to ___________ to wait to test for a parasitic load. 10 minutes and 1 hour 10 minutes and 2 hours 30 minutes and 2 hours 50 minutes to 75 minutes
10 minutes and 2 hours
In order to be considered a high impedance meter the meter needs to be rated at __________ . 10,000 ohms or higher 100,000 ohms or higher 1,000,000 ohms or higher 10,000,000 ohms or higher
10,000,000 ohms or higher
A digital multimeter is capable of measuring current up to how many amps? 00.10 A 500 mA 1.000 A 10.00 A
10.00 A
Convert 01.00 volts to millivolts. 0001 millivolts 0010 millivolts 0100 millivolts 1000 millivolts
1000 millivolts
Using Ohm's Law: Voltage is 12 volts Amperage is 6 amps What is the resistance? Answer with an exact number
2
Batteries in Toyotas typically have a rating between _______ to _______ amperes, depending on the model. 250 to 550 200 to 630 400 to 850 300 to 710
300-710
Batteries in Toyotas typically have a rating between _______ to _______ amp-hours, depending on the model. 50 to 105 40 to 90 70 to 140 10 to 120
50-105
Batteries in Toyotas typically have a rating between _______ to _______ minutes, depending on the model. 10 to 60 55 to 115 60 to 120 90 to 120
55-115
Using Ohm's Law: Voltage is 12 volts Resistance is 2 ohms What is the amperage? Answer with an exact number
6
Technician A says that there is a separate meter to measure volts, amps, and ohms - one for each measurement. Technician B says that there is one meter that can measure all three volts, amps, and ohms. Which technician is correct? Technician A Technician B Both Technicians are correct Neither Technician is correct
BOTH
What is the best way to neutralize the battery acid if it spill on the vehicle? Baking soda and water, then rinse with a lot of water Just plain water Wipe up the excess with a towel and then spray down the area with a parts cleaner If the battery was new the electrolyte won't be harmful. If the battery was old the electrolyte should be cleaned up with Clorox bleach
Baking soda and water, then rinse with a lot of water
Match the electrical component with the major characteristic Diode Clamping Diode Photo Diode LED Avalanche Diode Zener Diode
Diode Simply allows electrical current flow in one direction Clamping Diode Used to protect circuits from high voltage spikes Photo Diode Allows reverse current flow when exposed to light LED Generates light when energized Avalanche Diode Protects circuits from excess voltage Zener Diode Allows current flow in the reverse direction after a specific voltage
What is a good definition of "Voltage"? The movement of protons from one atom to another The intensity of electrical flow Electrical pressure The balancing and unbalancing of atoms in a material that is considered a conductor
Electrical pressure
Match the particle with the electrical charge. Electron Protons Neutrons Simultrons
Electron- Negatively Charged Protons- Positively Charged Neutrons- Neutral (No Charge) Simultrons- Not a particle of an atom
What is the battery testing station that Toyota recommends to be used? BR-97 VAT-40 BAT-88 GR-8
GR-8
Which of these is a conductor? Ceramic Gold Silicon Wood
Gold
Match the letter with the electrical concept I E R P
I Current / Amperes E Voltage R Resistance / Ohms P Watts
In order to check available voltage in the entire circuit the voltmeter is connected: In series In parallel, doesn't really matter how In parallel, with the black lead on the ground and the red lead on the battery positive In parallel, with the black lead on the ground and the red lead on the battery positive side of the load In parallel, with the red lead on the battery positive side of the load and the black lead on the side of the load OPPOSITE battery positive
In parallel, with the black lead on the ground and the red lead on the battery positive
Match the modifier with the correct multiplication. M= m= k=
M= 1,000,000 m= 0.001 k= 1000
What would a tool display if a technician measured the resistance value of a wire that has an "open"? O.L 0.000 Ohms 10 - 40 ohms Under 10,000 Ohms
OL
Technician A says that all short circuits will result in a blown fuse. Technician B says that an open circuit can cause a blown fuse. Which technician is correct? Technician A Technician B Both Technicians are correct Neither Technician is correct
Neither Technician is correct
Technician A says that you can always tell if a fuse is bad just by looking at it. Technician B says that a good fuse will measure OL when checked with a DMM. Which technician is correct? Technician A Technician B Both Technicians are correct Neither Technician is correct
Neither Technician is correct
Technician A says to top off the electrolyte in the battery with tap water as long as the tap water has been sitting still for more than one hour. Technician B says to top off the electrolyte in the battery with additional acid if the battery is a conventional lead acid battery. Which technician is correct? Technician A Technician B Both Technicians are correct Neither Technician is correct
Neither Technician is correct
Technician A is charging an AGM battery with a quick charger in order to perform a battery SOH test. Technician B is replacing the AGM battery in the vehicle with a conventional battery to save the customer money. Which technician is performing the correct task? Technician A Technician B Both Technicians are doing the right job Neither Technician is doing their job right
Neither Technician is doing their job right
If R1 = 2 ohms R2 = 4 ohms R3 = 2 ohms What is the TOTAL circuit AMPERAGE? 15 amps 9.6 amps 6 amps 3 amps None of the answers are correct
None of these answers are correct
Which of these is NOT a capacity rating for batteries? CCA RCA RC CA AH All of the answers are correct
RCA
A technician wants to REDUCE the amount of resistance in a starter circuit. Which one is the BEST way to accomplish this? Change the battery to a larger battery Replace the positive cable from the battery to the starter with a cable that has a larger gauge. Replace the ground connection with a larger bolt. Increase the length of the cable from the battery to the starter.
Replace the positive cable from the battery to the starter with a cable that has a larger gauge.
What is the difference between a SPST and a SPDT? SPST has mercury and SPDT is mechanical SPST is low amperage and SPDT is high amperage SPST is normally energized and SPDT is normally de-energized SPST has a single output circuit and SPDT has two output circuits
SPST has a single output circuit and SPDT has two output circuits
Technician A says that an open circuit will cause a fuse to blow. Technician B says that a blown fuse causes an open circuit. Which technician is correct? Technician A Technician B Both Technicians are correct Neither Technician is correct
Tech B
Match the term with the definition Source Voltage Available Voltage Voltage Drop
Source Voltage how much voltage is being supplied by the battery or alternator Available Voltage how much voltage is being delivered to a certain point in a circuit Voltage Drop how much voltage is dissipated ("used up") between two points in a circuit
Voltage can exist when electrons are NOT flowing. True False
TRUE
Technician A says that a digital multimeter has a fluctuating needle placed over a graduated dial. Technician B says that a digital multimeter is less susceptible to damage from mechanical shock. Which technician is correct? Technician A Technician B Both Technicians are correct Neither Technician is correct
Tech B
Technician A says that an open circuit could cause the fuse for that circuit to blow. Technician B says that a short circuit could cause the fuse for that circuit to blow. Which technician is correct? Technician A Technician B Both Technicians are correct Neither Technician is correct
Tech B
What is ohm's law? Voltage equals amperage plus resistance Voltage equals amperage divided by resistance Voltage equals amperage times resistance Voltage equals amperage minus resistance None of the answers are correct
Voltage equals amperage times resistance
What is Watt's Law? Watts (Power) is equal to Amps times Ohms Watts (Power) is equal to Volts times Ohms Watts (Power) is equal to Volts divided by Amps Watts (Power) is equal to Volts times Amps None of the answers are correct
Watts (Power) is equal to Volts times Amps
When is the best time to select "auto range" on a multimeter? To get the MOST accurate measurement When first connecting to the circuit to find the initial value A technician should leave a multimeter on "auto range" all the time A technician should never use "auto range"
When first connecting to the circuit to find the initial value
