CHƯƠNG 7: FUTURE CAR

Which of the following statements is not correct with respect to alcohols as alternate fuel?

• Anti-knock characteristics of alcohol are poor

• Alcohol contains about half the heat energy of gasoline/liter

• Alcohol does not vaporize as easily as gasoline

• Alcohols are corrosive in nature

Why a small amount of gasoline is added to alcohol?

• To reduce the emission

• To increase the power output

• To increase the power efficiency

• To improve cold-weather starting

What is a dual fuel engine?

• The engine which uses gaseous and liquid fuel

• The engine which uses two liquid fuels

• The engine which uses two gaseous fuels

• The engine which uses one liquid and any other fuel

Which of the following has the same combustion as HCCI (Homogeneous Charge Compression Ignition) engine?

• SI engine

• CI engine

• Hybrid of both SI and CI engine

• Wankel engine

Which of the following is true for the HCCI engine?

• Emits high NOx and soot

• Have a large power range

• Efficiency is comparatively less

• Pre-catalyst hydrocarbon emissions are higher

For which of the following engine lean-burn concept is ideal?

• CI engine

• SI engine

• Free piston engine

• Wankel engine

By which technique can the charge stratification be achieved?

• Injection

• Carburetion

• Lean burn technology

• Injection as well as carburation

Which of the following is true for stratified charge engine?

• More prone for knock

• Multi-fuel capabilities

• More throttling losses

• Overall rich mixture

What is true about the Wankel engine?

• It is a rotary external combustion engine

• It is more expensive

• It has a longer operating cycle

• It has less time to complete the combustion

Where is the variable compression ratio used?

• SI engine

• CI engine

• Wankel engine

• HCCI engine