Automotive Technology: Principles, Diagnosis, And Service (6th Edition) (halderman Automotive Series)
6th Edition
ISBN: 9780135257272
Author: James D. Halderman
Publisher: PEARSON
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Textbook Question
Chapter 19, Problem 9CQ
What color exhaust smoke occurs most often during cold engine starts because the smoke is usually condensed fuel droplets?
- a. Grey
- b. Blue
- c. White
- d. Black
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Chapter 19 Solutions
Automotive Technology: Principles, Diagnosis, And Service (6th Edition) (halderman Automotive Series)
Ch. 19 - What is the difference between direct injection...Ch. 19 - What are the three phases of diesel ignition?Ch. 19 - Prob. 3RQCh. 19 - What exhaust after-treatment is needed to achieve...Ch. 19 - What are the advantages and disadvantages of SCR?Ch. 19 - How is diesel fuel ignited in a warm diesel...Ch. 19 - Which diesel system supplies high-pressure diesel...Ch. 19 - What fuel system component is used in a vehicle...Ch. 19 - Which of the following may be a symptom of...Ch. 19 - Technician A says that glow plugs are used to help...
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- True or False? In an HCCI engine, combustion immediately and simultaneously produces a steady flame across the mixture.arrow_forwardHow does a GDI system provide for a stratified charge in the combustion chamber?arrow_forwardBriefly describe and write the equation for perfect (complete) combustion.arrow_forward
- Why is the sulfur content in gasoline limited?arrow_forwardName the three types of emissions being controlled in gasoline engines.arrow_forward1) Which one of the following is an undesirable byproduct of combustion in IC engines that is caused due to high temperature conditions? O Unburnt hydrocarbons. O Soot O Carbon monoxide. O Oxides of nitrogen. 2) Which one of the following statements is true about emissions from Sl engines? OA rich fuel-air mixture decreases the tendency for more HC emissions ONOX emissions would be maximum at a slightly rich mixture O NOx emissions decrease as the fuel-air mixture becomes either too rich or too lean. OA lean fuel-air mixture increases the tendency for more CO emissions 3) Which one of the following is correct about HC emission? O t is reflective of complete combustion of fuel. It results due to improper mixing of fuel and air O Unburnt HCs do not contribute to photochemical smog. O It decreases as the fuelair mixture becomes too leanarrow_forward
- Differentiate the two types of external combustion enginearrow_forward3. Emission control systems are installed on engines to reduce what three specific exhaust products? A. Oxides of sulfur, hydrocarbons, and nitrogen. B.Hydrocarbons, carbon dioxide, and nitrogen oxides. C.Hydrocarbons, carbon monoxide, and oxides ofarrow_forwardWhich of the following statements about carbondioxide is not true?a. CO2 levels are highest when the air-fuel ratiois slightly leaner than stoichiometric.b. The production of CO2 is directly related tothe amount of fuel consumed; therefore,more fuel-efficient engines produce less CO2c. To reduce CO2 levels in the exhaust, engineers are working hard to decrease fuel consumption to keep CO2low.d. The concern for CO2 emissions is one of theprimary reasons for the delayed use of alternative fuels for automobiles.arrow_forward
- technician A says lean ratio of 15:1 to 16:1 provide the best fuel economy. technician B says rich mixture have a ratio below 14.7:1 and provide more power from the engine but greater fuel combustion. who is correct?arrow_forwardWhich fuel gas has the strongest odor and is easiest to detect?arrow_forwardWhile diagnosing a PCV problem: Technician A says that a stuck open PCV valve will cause a richer than normal air-fuel mixture. Technician B says that oil in the air cleaner assembly can be caused by worn piston rings. Who is correct? a. Technician A only b. Technician B only c. Both A and B d. Neither A nor Barrow_forward
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