Automotive Technology
7th Edition
ISBN: 9781337794213
Author: ERJAVEC, Jack.
Publisher: Cengage,
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Textbook Question
Chapter 4, Problem 21MC
Which of the following is not accomplished by the fuel and air system of a gasoline engine?
- Stores the fuel for later use
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What are the major components of a Piston Engine fuel System What are their major functions or roles within the system
What is the function of the exhaust valve?
Regulate the air-fuel ratio
Filter air entering combustion chamber
Protect piston from exhaust gases
Controls flow of exhaust gases out of the combustion chamber
Which is not a cause of detonation?
Wrong ignition timing
Allowing the engine to overheat
Fuel/air mixture too lean
Using a fuel grade higher than recommended
Chapter 4 Solutions
Automotive Technology
Ch. 4 - Prob. 1SACh. 4 - Explain the four strokes of the internal...Ch. 4 - In addition to the battery, what does the charging...Ch. 4 - What is meant by the term regenerative braking?Ch. 4 - Which of the following is not a common emission...Ch. 4 - Automatic transmissions use a instead of a clutch...Ch. 4 - Which of the following is not one of the strokes...Ch. 4 - Prob. 4MCCh. 4 - Which is not a common automotive fuel? Gasoline...Ch. 4 - What does the valve train do? It delivers fuel to...
Ch. 4 - Technician A says that liquid cooling an engine...Ch. 4 - Prob. 8MCCh. 4 - Which emission control system introduces exhaust...Ch. 4 - Prob. 10MCCh. 4 - Technician A says that a transaxle delivers torque...Ch. 4 - Which of the following is not part of the running...Ch. 4 - Which of the following statements about unibody...Ch. 4 - Which type of transmission uses pulleys to change...Ch. 4 - Prob. 15MCCh. 4 - What two major engine components work together to...Ch. 4 - Technician A says that an air-conditioning system...Ch. 4 - The boiling point of the coolant in an engines...Ch. 4 - While discussing the operation of air-conditioning...Ch. 4 - Prob. 20MCCh. 4 - Which of the following is not accomplished by the...
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- Which of the following is an expression of how much of the heat formed during the combustion process is available as power from the engine? Mechanical efficiency Engine efficiency Volumetric efficiency Thermal efficiencyarrow_forwardWhich of the following conditions can be revealed by fuel pressure readings? Faulty fuel pump Faulty fuel pressure regulator Restricted fuel delivery system All of the abovearrow_forwardDifferentiate the two types of external combustion enginearrow_forward
- Which of the following is not an effective way to determine if an engine has an internal coolant leak? Performing a pressure test on the system Visually inspecting the exhaust, coolant, and engine oil Using a dye penetrant and black light Using a combustion leak testerarrow_forwardWhich of the following statements about engines is not true? The engine provides the rotating power to drive the wheels through the transmission and driving axle. Only gasoline engines are classified as internal combustion. The combustion chamber is the space between the top of the piston and the cylinder head. For the combustion in the cylinder to take place completely and efficiently, air and fuel must be combined in the right proportions.arrow_forwardWhich of the following is the best description of the power stroke? The ignition of the air fuel mixture increases pressure in the cylinder, which applies force to the face of the piston, driving it down. As the piston travels upward, it pushes the products of combustion out of the open exhaust valve. The crankshaft drives the piston down as the flywheel absorbs the energy created by the ignition of air fuel mixture. An air-fuel mixture is drawn into the combustion chamber as the piston moves toward the bottom of the cylinder.arrow_forward
- Which 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_forwardExcessive oxygen in the exhaust indicates an improper air/fuel mixture. True Falsearrow_forwardWhich is not a common automotive fuel? Gasoline Diesel Hydrogen Ethanolarrow_forward
- Which of the following statements about fuel trim is not true? a. A positive fuel trim value means that the PCM detects a lean mixture and is decreasing the pulse width to add more fuel to the mixture. b. Short-term fuel trim represents changes made immediately in response to HO2S signals. c. Long-term fuel trim represents changes made to set a new base pulse width. d. Long-term fuel trim responds to the trends of the short-term fuel trim.arrow_forwardTrue or False? On todays vehicles, an electric fuel pump runs only when the engine is running.arrow_forwardWhen checking the exhaust system, the Certified Inspector must reject the vehicle if: It does not have a heat shield. It does not have a muffler. It does not have a turbocharger. It does not have either a muffler or a turbocharger.arrow_forward
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