Question 1

What type of vehicle is designed to be able to run on either gasoline or a methanol or ethanol blend, M85 or E85?

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Question 2

For what does the acronym SULEV stand?

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Question 3

How does a series system HEV propel itself?

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Question 4

The Atkinson cycle design improves fuel mileage by:

Accepted Answer

The Atkinson cycle design keeps the intake valve open longer than the exhaust valve, which reduces pumping losses and allows for more efficient combustion. This, in turn, improves fuel mileage. The other choices listed (increasing compression ratio, opening both valves a greater distance, and increasing valve overlap) can also improve engine efficiency, but they are not specific to the Atkinson cycle design.

Question 5

Technician A says LPG can be used with both diesel and gasoline powered engines. Technician B says the LPG must be blended with gasoline on start-up, then the engine can run on LPG. Who is correct?

Accepted Answer

Technician A is correct because LPG (Liquefied Petroleum Gas) can indeed be used in both diesel and gasoline engines through different conversion systems, allowing these engines to run on LPG. Technician B's statement is not universally true, as the requirement to blend LPG with gasoline on start-up depends on the specific conversion system and engine design; many LPG systems can start directly on LPG without the need for blending with gasoline.

Question 6

For what does the acronym CARB stand?

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Question 7

What kind of vehicles were designed to run on one type of alternative fuel?

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Question 8

How are the wheels driven in a dual parallel system HEV?

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Question 9

Technician A says regenerative braking takes the place of the traditional brake system on HEVs. Technician B says regenerative braking uses kinetic energy during acceleration to recharge the high-voltage battery. Who is correct?

Accepted Answer

Regenerative braking does not replace the traditional brake system; it works alongside it. It uses kinetic energy during deceleration, not acceleration, to recharge the high-voltage battery.

Question 10

Ethanol can be made from all of the following EXCEPT ____.

Accepted Answer

Ethanol can be made from corn, wheat, and sugar cane, but soybeans are not a common source for ethanol production.

Question 11

Technician A says that CNG tanks are labeled with a serial number. Technician B say that CNG tanks must have a date of manufacture. Who is correct?

Accepted Answer

Both technician A and B are correct. CNG tanks are labeled with a serial number to identify each tank individually, and they must have a date of manufacture to ensure they are within their safety lifespan.

Question 12

CNG tanks may be made of all of the following EXCEPT ____.

Accepted Answer

CNG tanks can be made of aluminum, steel, or composites, but not copper. Copper is not a suitable material for CNG tanks due to its relatively low strength compared to other materials.

Question 13

Technician A says that leather mechanics gloves can protect you from high voltage electrical shock on an HEV. Technician B says that latex surgical gloves must be used on an HEV to protect you from high voltage shock. Who is correct?

Accepted Answer

Neither technician A nor B is correct. Leather mechanics gloves or latex surgical gloves cannot protect against high voltage electrical shock. It is recommended to use insulated gloves designed specifically for high voltage protection when working on HEV.

Question 14

Why should only specially trained technicians attempt to service hybrid electric vehicles?

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Question 15

All of the following are bi-fuel combinations except:

Accepted Answer

Bi-fuel vehicles are designed to run on two types of fuel, but they typically use gasoline paired with another alternative fuel such as CNG (compressed natural gas), propane, or E85 (a blend of 85% ethanol and 15% gasoline). CNG and diesel are not commonly paired together in bi-fuel systems because they require different types of combustion processes; CNG is typically used in spark-ignited engines, while diesel fuel is used in compression-ignition engines.

Question 16

Technician A says that propane is roughly 30% less dense than gasoline. Technician B says that fuel consumption with propane is slightly higher than gasoline. Who is correct?

Accepted Answer

Both statements are correct. Propane is indeed less dense than gasoline, which affects its energy content per volume, and vehicles running on propane typically experience higher fuel consumption compared to those running on gasoline due to differences in energy content.

Question 17

What type of fuel is made of 85% methanol and 15% petroleum?

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Question 18

What should you wear when disconnecting the service plug on the Prius?

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Question 19

A customer states there is a smell of natural gas when starting and shutting off her CNG fueled car. Technician A says a slight natural gas odor is normal. Technician B says a odor of natural gas indicates a leak. Who is correct?

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Question 20

What is the cleanest burning fuel used today?

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Quiz 14: Alternative Fuel and Advanced Technology Vehicles