Automotive Technology
7th Edition
ISBN: 9781337794213
Author: ERJAVEC, Jack.
Publisher: Cengage,
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Textbook Question
Chapter 9, Problem 1MC
Which 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.
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Which 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.
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c. The combustion process must be slow.
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Chapter 9 Solutions
Automotive Technology
Ch. 9 - Prob. 1SACh. 9 - Describe what takes place during the four strokes...Ch. 9 - As an engines compression ratio increases, what...Ch. 9 - What test can be performed to check the efficiency...Ch. 9 - Describe five ways in which an engine can be...Ch. 9 - Prob. 6SACh. 9 - True or False? In an HCCI engine, combustion...Ch. 9 - True or False? SAE mandates that engine, when...Ch. 9 - True or False? The camshaft is always located in...Ch. 9 - Which of the following statements about engines is...
Ch. 9 - Which stroke in the four-stroke cycle begins as...Ch. 9 - Which of the following is not a true statement...Ch. 9 - Technician A says head gasket thickness has an...Ch. 9 - The stroke of an engine is the crank throw half...Ch. 9 - Which of the following is an expression of how...Ch. 9 - While diagnosing the cause for blue smoke from the...Ch. 9 - Prob. 2ASRQCh. 9 - While determining the cause for air leaking out of...Ch. 9 - While diagnosing the cause for an engine having...Ch. 9 - While looking at the results of an oil pressure...Ch. 9 - A vehicle is producing a sharp, metallic rapping...Ch. 9 - While conducting an engine vacuum test; Technician...Ch. 9 - While determining the most likely problem of an...Ch. 9 - When a customer states that black exhaust smoke is...Ch. 9 - Technician A says that if an engine had good...
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- How does a GDI system provide for a stratified charge in the combustion chamber?arrow_forwardWhich 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_forwardWhat products of combustion are produced with ideal combustion when fuel oil is burned?arrow_forward
- Briefly describe and write the equation for incomplete combustion.arrow_forwardIncreasing engine speed will decrease the engine knocking tendency because: Select one: Combustion speed will increase due to higher air speed inside the combustion chamber O b All of the choices Oc Intake pressure will decrease due to lower volumetric efficiency Od Duration of engine reactions will decreasearrow_forwardfuel and combustionarrow_forward
- What are the major components of a Piston Engine fuel System What are their major functions or roles within the systemarrow_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_forwardThe amount of theoretical oxygen for combustion of a given fuel can be computed from the complete flue gas analysis of the fuel. * True Falsearrow_forward
- How do the volumetric efficiency and air-fuel ratio change as the engine's rotational speed changes? With a brief explanation of the change process with an explanation of the reasonsarrow_forwardDuring the following stroke, the burning mixture raises the temperature and pressure, compresses the charge in the crankcase and piston approaches the end of stroke Exhaust Stroke O Expansion Stroke Compression Stroke Power Strokearrow_forwardIncomplete combustion is permitted because a significant amount of heat is still generated. true of falsearrow_forward
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