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Exam 35: Hybrid Vehicles

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Question 1

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A(n)______________is a power converter that changes the high DC voltage of the battery to a three-phase AC voltage for the electric motors.

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Question 2

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In a hybrid vehicle the ___________________ changes the high DC voltage of the battery to a high AC voltage for the electric motors.

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Question 3

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List five commonsense rules that should be followed when working on a hybrid vehicle.

How often must insulated lineman's gloves be tested and recertified?

Nearly all hybrids have less powerful engines than typical non-hybrids. What feature of a hybrid provides power to allow the engine to overcome heavy loads?

Technician A says an insulation resistance tester measures voltage. Technician B says an insulation resistance tester measures the effectiveness of a wire's insulation. Who is correct?

Which of the following is the least likely to decrease fuel consumption of a hybrid vehicle?

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?

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?

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?

When a Toyota hybrid is driving on electric power, if more torque is needed, _____ is activated to start the engine.

A gasoline engine provides more torque at lower speeds than an electric motor.

After isolating the high-voltage system, what is the minimum time you should wait before beginning to work on or around the hybrid system?

What equipment is needed to safely test the high-voltage components of the hybrid vehicle electrical system?

All hybrids have an electric motor inside the transmission.

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 any 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?

Technician A says Ford hybrid SUV's with 4WD have an additional motor in the rear axle. Technician B says Ford's Energi models are plug-in hybrids. Who is correct?

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?

Which statement about the power-split system currently used on Ford, Nissan, and Toyota hybrid vehicles is false?

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?