Deck 80: Hybrid Electric Vehicle Fundamentals

Question 1

12)Which of the following statements about supercapacitors is LEAST-Likely to be true?

A) supercapacitors can discharge and store electricity as the output of the battery pack changes.
B) supercapacitors cannot be overcharged; they just get full.
C) supercapacitors contain toxic materials that require special environmental consideration during disposal.
D) a supercapacitor can recharge very quickly and can also discharge very quickly.

Answer 1

C

Question 2

20)The larger Toyota and Lexus hybrids use an additional third electric motor on the ____________________ to provide extra acceleration, all-wheel drive, and traction control.

Answer 2

rear axle

Question 3

19)In a conventional DC motor, electrical arcing not only causes wear but results in electrical interference in computer circuits. A(n) ____________________  has no commutator or brushes, so arcing cannot occur.

Answer 3

brushless motor

Question 4

14)Technician A says that when the driver releases the accelerator pedal, regenerative braking begins. Technician B says that the hydraulic brakes are used at this time. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 5

10)The ____ is the interconnected network that moves electricity from generating stations to customers throughout the world.

A) electrical grid
B) Cloud
C) Acoustic Vehicle Alerting System (AVAS)
D) Atkinson cycle

Question 6

17)A micro hybrid or stop-start hybrid has a more robust generator that also acts as a starter. It is known as a(n) ____________________ and is powered by a belt drive attached to the crankshaft.

Question 7

1)Most hybrid automobiles are powered with an ICE or a battery-powered electric motor/generator (MG), but not both at the same time.

Question 8

9)All of the following are hybrid classifications EXCEPT:

A) mild
B) block
C) full
D) plug-in

Question 9

8)All of the following statements are true EXCEPT:

A) a mild hybrid, sometimes called a power-assist hybrid, can be either series or parallel.
B) a parallel mild hybrid is the same as a micro hybrid, except that it can also use the ISG to provide additional power to the ICE when accelerating.
C) parallel mild hybrids do not propel the vehicle using only the electric motor.
D) a mild hybrid provides great additional improvement in fuel economy at freeway speeds.

Question 10

3)Conventional 12-volt lead-acid batteries are  used in all electric motor-powered vehicles.

Question 11

15)The ____ determines when to turn the engine on and off.

A) computer
B) MG1 electrical field
C) clutch pack
D) generator

Question 12

13)Which of the following  is LEAST-Likely to be a type of supercapacitor?

A) double-layer capacitor
B) quad-core capacitor
C) pseudocapacitor
D) hybrid capacitor

Question 13

18)Pulse and glide driving when accelerating and decelerating is best for ____________________.

Question 14

6)Technician A says that automotive parallel and series/parallel hybrids have their batteries charged by the engine. Technician B says that they are powered by regenerative braking. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 15

16)The batteries in parallel and series/parallel hybrids are charged either by the engine or by  ____________________.

Question 16

7)While having a discussion, Technician A says to be careful when working or inspecting under the hood. If the READY light is on, the engine can start at any time. Technician B says that only pushing the START button will start the engine. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 17

2)A micro hybrid is not actually a true hybrid because it does not use electricity to power the vehicle.

Question 18

11)Which of the following statements about ICEs in hybrid vehicles is LEAST-Likely to be true?

A) most hybrid vehicles use a gasoline engine to assist an electric motor, or motors, to power the wheels.
B) an ICE has low torque output at low rpm, while an electric motor has high torque from a standing start.
C) at cruising speeds, the ICE is more powerful than necessary.
D) The series-parallel hybrid uses a smaller ICE that uses the Otto cycle.

Question 19

4)Most current hybrid automobiles use NiMH batteries.

Question 20

5)Supercapacitors, also called ultracapacitors, are smaller than conventional capacitors.

Question 21

21)What are the advantages of hybrids?

Question 22

22)Briefly describe the difference between a motor and an engine.

Question 23

24)Some hybrid vehicles have used CVT or conventional automatic transmissions, but many other hybrids use a unique transmission known as an ECVT or electronically controlled continuously variable transmission. What is the difference?

Question 24

23)What is the memory effect that occurs in some rechargeable batteries?

Question 25

25)In the Toyota hybrid system (THS), hybrid motor/generators operate as motors when they power a vehicle. They can also generate electricity to recharge the battery pack.  Describe the functions of Motor/Generator 1 and Motor/Generator 2.