B- Exam study guide
Which of the statements about hydrogen is FALSE?
A hydrogen atom is one proton and two electrons
While discussing the classification of the Chevy Volt, Technician A says it can be called a plug-in hybrid. Technician B says it can be called a parallel hybrid. Who is correct?
A only
Technician A says for Hybrid SUV's with 4WD have an additional motor in the rear axel. Technician B says Ford's Energi models are plug-in hybrids. Who is correct?
B only
Technician A says that all FCEVs have regenerative braking. Technician B says that all FCEVs have an auxiliary 12-volt battery. Who is correct?
B only
Technician A says a motor converts electrical energy into mechanical energy. Technician B says an engine converts chemical energy into mechanical energy. Who is correct?
Both A and B
The high voltage wiring in a hybrid vehicle is identified by the ______ colored wiring harness cover.
Orange
Which of the following statements about hydrogen is false?
Producing hydrogen by electrolysis is an inexpensive way to produce hydrogen.
Which statement about the high voltage circuits in a Honda Hybrid is FALSE?
There is a main switch on the instrument panel that is used to disconnect the battery module from the rest of the car.
In some hybrids, regeneration begins as soon as the driver's foot leaves the accelerator. True or false?
True
The Nissan Leaf is a true ZEV with zero tailpipe emissions. True or false?
True
The armature of the motor is the only moving part in an EV. True or false?
True
After isolating the high-voltage system, which is the minimum time you should wait before beginning to work on or around the hybrid system?
5 minutes
The compressed hydrogen used in FCEVs (fuel cell electric vehicle) is stored at approximately _________ psi.
5,000
Hybrid vehicles are being discussed. Technician A says in a series hybrid the engine is there only to extend the vehicle's driving range. Technician B says in a parallel hybrid the electric motor and batteries are the main power source during normal driving conditions. Who is correct?
A only
Technician A says PVE refrigerant oil is commonly recommended for electric A/C compressors. Technician B says PAG refrigerant oil can be used in many electric A/C compressors. Who is correct?
A only
Technician A says a mild hybrid has a stop-start, regenerative braking, and electric motor assist available when the engine needs added power to overcome the load. Technician B says a full hybrid has stop-start, regenerative braking, electric motor assist, and can be driven by only electricity. Who is correct?
A only
Technician A says hybrids have an electrohydraulic brake assist system. Technician B says hybrids have an engine vacuum assisted power brake system. Who is correct?
A only
Technician A says that a fuel cell produces electricity through an electrochemical reaction that combines hydrogen and oxygen to form water. Technician B says that in a fuel cell, catalysts are used to ignite the hydrogen, causing a release of electrical energy. Who is correct?
A only
Technician A says that gasoline can be used as a source of hydrogen for a fuel car. Technician B says that carbon dioxide can be used as a source of hydrogen for a fuel cell. Who is correct?
A only
Which statement about the power-split system currently used on Ford, Nissan, and Toyota hybrid vehicles is FALSE?
Belts and pulleys are used to reduce speed and increase transmission torque output.
On a Honda Hybrid, the IMA (integrated motor assist) unit is located ______.
Between the engine and transmission
Hydrogen-fueled vehicles are being discussed. Technician A says hydrogen [H2] can be made from natural gas. Technician B says hydrogen can be made from water. Who is correct?
Both A and B
Technician A says an insulation resistance tester measures voltage. Technician B says tester measures the effectiveness of a wire's insulation. Who is correct?
Both A and B
Technician A says diesel engines can be used in a hybrid powertrain. Technician B says a gasoline engine is normally used in hybrid powertrain. Who is correct?
Both A and B
Technician A says hybrid vehicles have an electric water pump to circulate coolant through the heater core when the engine is stopped. Technician B says some hybrid vehicles have a hot coolant storage tank to provide heat for the passenger compartment when the engine is shut down. Who is correct?
Both A and B
Technician A says hybrid vehicles use electrically driven high voltage A/C compressors. Technician B says hybrid vehicles use engine driven A/C compressors. Who is correct?
Both A and B
Technician A says most hybrids also have an auxiliary 12-volt battery to power conventional electrical items, such as lighting, wipers, sound systems, etc. Technician B says the DC-DC converter reduces some of the high voltage DC from the battery pack to 12-volt DC in order to charge the auxiliary 12-volt battery. Who is correct?
Both A and B
Technician A says some BEVs use liquid to heat the passenger compartment. Technician B says some BEVs use an electric resistance heater with a fan to heat the passenger compartment. Who is correct?
Both A and B
Two technicians are discussing the operation of the Toyota hybrid transaxel. Technician A says that the vehicle is driven electrically by MG2 when the transmission selector is in reverse. Technician B says that whenever the car is powered by MG2, the engine may start if the battery SOC is low. Who is correct?
Both A and B
While discussing an Illuminated Malfunction Indicator Light (MIL) on the instrument panel of a BEV: Technician A says diagnosis of BEV concerns are much more difficult than diagnosing concerns on a conventional vehicle because there are more components. Technician B says faults held in the computer's memory can be retrieved as DTCs. Who is correct?
Both A and B
While discussing charger connections: Technician A says nearly all BEVs currently sold in North America have an AVCON connector. Technician B says the connector currently used for DC fast charging on the Nissan Leaf and Mitsubish i vehicles is based on the CHAdeMO standard. Who is correct?
Both A and B
While discussing controllers in BEVs: Technician A says the controller may reverse the current flow to the motor when reverse gear is selected. Technician B says modern controllers adjust motor speed through pulse width modulation. Who is correct?
Both A and B
While discussing diagnosis of the control system of a BEV: Technician A begins by checking the voltage of the auxiliary battery. Technician B inspects all fuses, fusible links, wiring harness, connectors, and ground in the low-voltage circuit. Who is correct?
Both A and B
While discussing inductive charging: Technician A says most current BEVs use this system because it is safe. Technician B says this method requires that a weatherproof paddle be inserted into the vehicle's charge port. Who is correct?
Both A and B
While discussing the DC-DC converter used in most hybrids: Technician A says that it changes some of the DC voltage from the battery module to an AC voltage for the electric motors. Technician B says that it provides the power to operate the car's 12-volt electrical system and accessories. Who is correct?
Both A and B
While discussing working on hybrid vehicles, technician A says to make sure that the high-voltage system is shut down and isolated from the vehicle before working near or with and high-voltage component. Technician B says to always use insulated tools when working on or near the high-voltage system, even when it is depowered. Who is correct?
Both A and B
Which of the following CANNOT be used as a source for the production of hydrogen?
Carbon Dioxide
A gasoline engine provides more torque at lower speeds than an electric motor. True or False?
False
A gasoline engine provides more torque at lower speeds than an electric motor. True or false?
False
In a parallel hybrid, the engine never directly powers the vehicle. True or false?
False
Nickel-metal-hydride (Ni-MH) type batteries are never used in hybrid vehicles. True or false?
False
The Integrated Motor Assist (IMA) hybrid system is similar to the ISAD but has smaller electric motor that generates more electrical power. True or False?
False
When working on a high-voltage system, it is important to create a buffer zone around the car that is two feet in width. True or false?
False
When you are depowering the high-voltage battery system of a hybrid vehicle, _________.
Wear lineman's gloves, Never wear anything metallic (jewelry), wait at least five minutes after disconnecting the HV batteries before working on the vehicle's electrical system. (AKA all the above)
Which of the following is NOT an advantage of a hybrid vehicle?
Zero CO2 emissons
"input split" and "compound split" are two modes of operation in a ________-type transmission.
dual-mode hybrid
What is the basic fuel for a fuel cell?
Hydrogen
Which of the following statements about fuel cells is NOT true?
In a fuel cells, catalysts are used to ignite the hydrogen; this causes a release of electrons or electrical energy.
Which of the following is the least likely to decrease fuel consumption of a hybrid vehicle?
Increased aerodynamic drag
When a Toyota hybrid is driving on electric power, if more torque is needed, ______ is activated to start the engine.
MG1
Which of the following is NOT a component of the Toyota hybrid transaxle?
Multiple disc clutch
Technician A says that power is the ability to do work. Technician B says that energy is the rate at which work is done. Who is correct?
Neither A nor B
Technician A says with conductive charging there is no metal-to-metal contact between the charge paddle and the charge port of the vehicle. Technician B says inductive charging takes place by making a connection between the charging connector and the charge port. Who is correct?
Neither A nor B
When working on a high-voltage system, Technician A makes sure the outside edges of the buffer zone are at least one foot away from the car. Technician B places orange cones to define the outer boundaries of the buffer zone. Who is correct?
Neither A nor B
While discussing hydrogen: Technician A says that a hydrogen atom has one proton and two electrons. Technician B says that hydrogen is produced in a fuel cell when water is broken down into its basic elements.
Neither A nor B
While discussing regenerative braking, technician A says the regenerative system can completely stop the vehicle in order to generate a maximum amount of electricity. Technician B says that because most hybrids are FWD vehicles, the rear wheels are designed to claim the most kinetic energy. Who is correct?
Neither A nor B
A storage battery only holds DC voltage. True or false?
True
In a PEM, the electrolyte is a polymer membrane, called the proton exchange membrane. True or false?
True
