Future Power Final
6
A six-pack motor has ___ IGBT's. 3 6 12 36
Brushed DC motor
A starter motor is an example of a _____________ motor. Brushed DC motor Brushless DC Motor A/C Motor Synchronous A/C Motor
False
A/C traction motors use two phases of current to energize the electric motor to propel the vehicle. True False
False
All Hybrid compressors operate the same and shut off when the internal combustion engine (ICE) is off. True False
True
All electrochemical batteries have three major parts: an anode, a cathode and an electrolyte. True False
False
All magnets have four poles. True False
Generator
During Regenerative braking, the traction motor acts as a __________ to recharge the HV battery. Motor Generator Alternator D/C Traction Motor
A/C Traction Motor
During Regenerative braking, when the driver lets up on the accelerator pedal, the computer shuts off power to the ___________. Accelerator Controller A/C Traction Motor Electric Brakes
False
Kinetic Energy is a term that refers to energy at rest. True False
Under Middle Seat
Location of the disconnect plug on a Chevrolet Tahoe Hybrid Trunk Compartment Rear Cargo Area Under Middle Seat Behind the rear seat
Rear Cargo Area
Location of the disconnect plug on a Ford Escape. Under the Driver Side Dash Engine Compartment Behind the rear seat Rear Cargo Area
Behind the rear seat
Location of the disconnect plug on a Honda Civic. Under the Driver Side Dash Trunk Compartment Rear Cargo Area Behind the rear seat
Rear Cargo Area
Location of the disconnect plug on a Toyota Prius. Trunk Compartment Rear Cargo Area Behind the rear seat Engine Compartment
North to South
Magnetic lines of force normally flow from ___________ to _______________. South to North North to South Depends on the magnet Both directions at the same time
False
Magnetism is created by the alignment of atoms in some non ferrous materials. True False
False
Magnets can be created by surrounding an Aluminum core with an electric current and the aluminum core will become magnetized. True False
False
Most Hybrid vehicles use a Brushless DC motor as the traction motor to propel the vehicle. True False
High-impedance DMM or DVOM on the Voltage Scale
Of the following diagnostic products which is the best suited for making exact voltage measurements when pinpoint testing and electronic circuit? Jumper wire with attachment High-impedance DMM or DVOM on the Voltage Scale Non-powered test light Scan tool on a VIN numbering system
regenerative
One of the primary functions of the flyback diode in an IGBT package is to steer electric current during ___ mode. advanced torque regenerative reverse machine start
maintain bus voltage level
One of the reasons that a power inverter control system uses different waveforms to power an electric machine is to ___. decrease maximum speed decrease slip angles maintain bus voltage level none of the above
MOSFET
One type of power transistor typically used in a power inverter is the ____. MOSFET FET MITFET IGFET
Rotor
Permanent magnets are an integral part of the ___________ in a Hybrid vehicle's traction motor. Reluctor Stator Armature Rotor
True
Permanent magnets are magnets that are found in nature. True False
regenerative braking
Reactive power is generated during ___ mode when the magnetic fields of the rotor cut across the stator pole windings. electric-assist propulsion regenerative braking capacitance charging boost converte
False
Recombinant batteries are another name for a standard lead acid auxiliary battery. True False
Disc Brakes
Regenerative Braking includes all of the following components except? Battery Pack Controller Power Inverter Disc Brakes Drive Motor
True
Regenerative braking allows a Hybrid/Electric vehicle to recover lost kinetic energy and convert this energy back to electricity to charge the HV battery. True False
False
Regenerative braking will rapidly reduce the life of the brake pads due to the high friction developed during braking. True False
Tech B
Testing the fuses using the OHMS function, it was determined that the fuse was bad. Tech A indicates they do not have a fuse like the one needed but they can use aluminum foil in its place to make the meter work. Tech B notes they are still getting readings so the meter should be ok to use. Which tech is right? Tech A Tech B Both A & B Neither tech
rapidly changing signals high or low values
The MAX/MIN button enables the tech to capture: rapidly changing signals high or low values sign wave readings DC voltage readings only frequencies
A, B and C are correct
The Three Phases of the AC synchronous motor used in the Toyota Hybrid system are? A. U Phase B. V Phase C. W Phase A, B and C are correct
slip
The __ control algorithm achieves torque control by controlling the phase electrical current in the stator coils and by controlling the slip frequency. torque ripple overmodulation slip reactive power
True
The batteries on high voltage systems can have a voltage ranging from 110 to over 330 volts at the battery. True False
True
The battery uses three service main relays (SMR) to connect the high voltage battery to the high voltage system. True False
increase horsepower and torque
The boost converter is primarily used in the power inverter to ___. increase horsepower and torque decrease battery-pack size reduce back EMF all of the above
Mutual Induction
The electrical principle that enables magnetic lines of force to move from one location to another in and electric motor is referred to as _________________. Live Induction the Right Hand Rule Mutual Induction the Law of Magnetism
Both A and B
The function buttons on the meter are used for? increasing the rotary dial capabilities of the meter converting the meter from auto to manual ranging None of the above Both A and B
False
The only way to establish a connection between a HV battery and the charger is by use of a metallic connection. True False
increase PWM
The power inverter controller must ___ to the IGBT to increase the voltage level to the electric machine. increase frequency increase PWM decrease frequency decrease PWM
behind the rear seat
The power inverter in a Honda Civic Hybrid can be found _____. behind the left kick panel behind the glove box behind the rear seat in the engine compartment
in the engine compartment
The power inverter in a Toyota Prius can be found _____. behind the left kick panel behind the glove box behind the rear seat in the engine compartment
battery-pack state of charge
The power inverter senses the ___ to control the amount of regenerative power generated during braking or vehicle coast. IGBT temperature vehicle speed battery-pack state of charge electric machine field vector
voltage
The sum of power concept is based on ___ differences between the rotor and stator. voltage current triggering control
charging system indicator bulb
The sum of power concept is very similar to the function of a(n) ___. alternator and generator rotor battery and cranking motor charging system indicator bulb high voltage vehicle light
Tech B
The technician presses the HOLD button on the meter to capture a reading. To return the meter to a live reading Tech A says turn the meter on and off. Tech B says press the HOLD button again. Which is correct for returning immediately to a live reading? Tech A Tech B Neither, they should press REL instead Neither, they should press the MAX/MIN button
Milliohm Test
What test is used to test for resistance in the windings of a traction motor stator assembly? Mega Ohm Test Milliohm Test Reluctance Test Open Circuit Test
True
When servicing the HV battery systems on a hybrid or electric car, the technician needs to wear lineman's gloves to disable the circuit. True False
False
When servicing the high voltage system, the technician can remove the service plug and at that point, the system is safe to work on immediately. True False
The number of times per second a signal happens
When using the meter in the Frequency setting you are measuring what? The number of times per second a signal happens Direct current Switch of a resistor Lighting circuit
NiCad
Which of the following cells are not considered environmentally friendly? NiCad NiMH Li-Ion Ultra-capacitors
All of the above
Which of the following identify the high voltage system on a hybrid or electric vehicle? Orange colored cables High voltage warning labels Covered connections All of the above None of the above
Ignition key and service plug
Which of the following must be removed from the vehicle and placed in a secure area when servicing the high voltage system? Ignition key Ignition key and service plug Ignition key, service plug and circuit opening relay Ignition key and circuit opening relay
Hz
Which of the following rotary dial settings would be best for measuring the number of cycles per second? Hz ohms mV non of the above
Service life can be extended by frequent deep cycles.
Which of the following statements about NiMH cells is true? The cylindrical design requires less storage space, but has less energy density than the prismatic design They have a relatively long service life. Service life can be extended by frequent deep cycles. They do not respond well to overcharging, they should be trickled charged.
Open in cooling fan circuit
A scan tool's data shows that the high voltage battery pack has been overheating. The most likely cause would be _________________. Open in cooling fan circuit Blocked radiator hose Low engine coolant level Corrosion in the cooling system
False
A cylindrical cell makes more efficient use of space than a prismatic cell. True False
Hydrocarbons
All of the following are considered green house gasses except: Hydrocarbons Carbon Dioxide Carbon Monoxide Oxides of Nitrogen
NiMH cells produce 3.6 volts
All of the following statements concerning NiMH batteries are true, except: NiMH batteries can be housed in a steel container NiMH cells produce 3.6 volts NiMH batteries use potassium hydroxide for electrolyte NiMH batteries have excellent cycle life
False
An AGM battery has liquid electrolyte which would leak out if the battery case is cracked. True False
MOSFET and bipolar
An IGBT contains ___ transistor technologies. MOSFET and bipolar bipolar and unijunction bipolar and gate turn-off thyristor and bipolar
True
An electric motor can become an electric generator by turning the rotor with an alternative power source. True False
Carbon Monoxide
An odorless, poisonous gas caused by incomplete combustion. Hydrocarbons Carbon Dioxide Oxides of Nitrogen Carbon Monoxide
No
Are the leads for an ammeter connected the same way as a voltmeter in the circuit? No Yes Only on AC circuits Only on DC circuits
CAT III
DVOM meter that should be used with HV circuitry. Class 0 Class 2 CAT III Class 4
True
Hybrid vehicles use a HV A/C compressor. True False
True
Hybrid vehicles use a scroll type A/C compressor due to its increased efficiency. True False
D. 7,400
If a technician uses a DMMor DVOM to measure resistance of a secondary ignition wire and gets a reading of 7.4 K-ohm, what would this value be in ohms A. 0.740 B. 74 C. 740 D. 7,400
stator frequency
If the power inverter controller were to request only an increase in speed (or rpm), the ___ must increase. waveform amplitude number of rotor bars number of magnets stator frequency
6
In a basic power inverter system, ___ transistors are used to drive a three phase electric machine. 3 6 12 24
False
In a lithium-polymer battery, the electrolyte is not flammable and these batteries are less hazardous than Li-Ion batteries. True False
all of these
Increasing the voltage to the electric machine also increases the ___. horsepower torque speed all of these
Both Technicians A and B
Rubber gloves should be worn whenever servicing the High Voltage components of a Hybrid Vehicle. Technician A says that the gloves should be checked before use and rated to at minimum 1000 volts. Technician B says that the gloves should be protected with leather over glove over them when in use. Who is correct? Technician A only Technician B only Both Technicians A and B Neither Technician A nor B
Test leads for breaks or damage
Safety is an issue when using test instruments. Another way to protect yourself is by testing the meter for one of the following before conducting specific tests: Test display for a signal Test leads for breaks or damage Test button pressure Test for ground
Test for good fuses
Safety is an issue when using testing instruments. You can protect yourself by testing the meter for one of the following before conducting specific tests: Test the dial for movement Test for good fuses Test for ground Test for terminal connection
Both Technicians A and B
Technician A says that AGM Batteries are a type of valve regulated lead acid battery. Technician B says that AGM should be charged using a conventional battery charger. Who is correct? Technician A only Technician B only Both Technicians A and B Neither A nor B
Technician A only
Technician A says that NiMH HV batteries normally use a prismatic design. Technician B says that the cells are connected in parallel. Who is correct? Technician A only Technician B only Both Technician A and B Neither A nor B
Technician A
Technician A says: Using the mAmps setting on the DMM or DVOM you can measure the low current flow in a circuit. Technician B says: Unlike the DMM or DVOM the mAmp setting is used and tested in parallel with the circuit of component being tested. Who is correct? Technician A Technician B Both Technicians are correct Neither Technician is correct
4
There are ____ basic waveforms for electric machine control. 2 3 4 6
The MIN/MAX button
To capture a Maximum value automatically during testing which function button would you press for this test? the HOLD button when a high value is seen the Range button The Hz/Duty button The MIN/MAX button
increase
To increase the electrical current to the electric machine stator coils, a power inverter must command sine wave amplitude to ___. increase decrease remain unchanged shut off for at least 3 secoonds
False
True or False. All Hybrids use the engine's cooling system to cool the inverter assembly.
False
True or False. Any DVOM will work when checking High Voltage circuits as long as it will read at least 100 volts.
True
True or False. High Voltage Gloves must be re-certified ever six months.
False
True or False. High Voltage Gloves should be tested using 100 psi shop air.
False
True or False. High Voltage Gloves will last forever as long as they are kept in a canvas bag.
True
True or False. High Voltage circuits could either be Blue, Yellow or Orange in color.
False
True or False. It is alright to use any rubber glove when working on High Voltage Hybrid Systems.
True
True or False. It is safe to work on the High Voltage side of a Hybrid Vehicle as long as the ignition is off and the key is out of the vehicle.
True
True or False. The High Voltage system can be shut off at the battery pack by being certain that the ignition key is off and removed from the vehicle.
True
True or False. The best way to recharge a High Voltage Battery is with the vehicles engine and on board charging system.
Toyota and Lexus
Voltage boosting of the power inverter is used by ____. Toyota and Lexus GM and Honda Toyota and GM Ford and Lexus
five minutes
What is the minimum time frame should you should wait after isolating the high-voltage battery before performing any service on the high-voltage system. five minutes fifteen minutes thirty minutes one hour
Mega Ohm Test
What test is used to test an electric motor for shorts to ground? Mega Ohm Test Milliohm Test Reluctance Test Open Circuit Test
The cold cranking amps rating represents the number of amps that a fully charged battery can deliver at o degrees for 30 seconds while maintaining a voltage above 9.6 volts for a 12 volt battery.
Which of the following statements about battery ratings is true? The ampere-hour rating is defined as the amount of steady current that a fully charge battery can supply for 1 hour without cell voltage falling below a predetermined voltage. The cold cranking amps rating represents the number of amps that a fully charged battery can deliver at o degrees for 30 seconds while maintaining a voltage above 9.6 volts for a 12 volt battery. The cranking amp rating expresses the number of amperes a battery can deliver at 32 degrees F for 30 seconds and maintain a voltage of 1.2 volts per cell. The reserve capacity rating expresses the number of amperes a fully charged battery at 80 degrees can supply before the battery voltage falls below 10.5 volts.
The alkaline electrolyte has an active role in the chemical reaction.
Which of the statements about NiMH cells is NOT true? When a NiMH cell discharges, hydrogen moves from the negative to the positive plate. Nickel-metal hydride batteries have a negative plate that contains nickel hydroxide. The alkaline electrolyte has an active role in the chemical reaction. The plates are separated by a sheet of fine fibers saturated in potassium hydroxide.
Tech B
With the meter just turned on and the dial set to u/mV an OFL reading appears on the display. To correct this situation Tech A says turn the meter off the on again. Tech B says press the RANGE button. Which tech is correct? Neither, they should press the Grey button Neither, they should press the TEST button Tech A Tech B
True
You can disable the high voltage battery by removing the 12 volt auxiliary battery's cables True False
Two
___ IGBT's are required to turn on two phases of a wye-connected stator. Two Three Six Eight
Overmodulation
___ is a technique used to increase the available voltage to a motor by using waveforms other than sine waves. Overmodulation Voltage boosting Boost converting Voltage bucking
PWM
____ is used to create an electric machine sine wave. PWM Triangle modulation Flux vectoring Unijunction