Automotive Technology: A Systems Approach (MindTap Course List)
6th Edition
ISBN: 9781133612315
Author: Jack Erjavec, Rob Thompson
Publisher: Cengage Learning
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Textbook Question
Chapter 29, Problem 10RQ
Which of the following statements about a fuel volume test is not true?
a. This test measures the flow rate of the pump and can help isolate fuel system restrictions or weak pumps.
b. The test is conducted by collecting the fuel dispensed by the certain during a period of time, normally 5 seconds.
c. The flow of fuel into the container should be smooth and continuous with no signs of air bubbles.
d. Poor results may indicate a bad pump or restrictions in the delivery system.
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Chapter 29 Solutions
Automotive Technology: A Systems Approach (MindTap Course List)
Ch. 29 - Fuel pump is a statement of the volume of the fuel...Ch. 29 - Explain the purpose of the relief valve and...Ch. 29 - Most fuel tank filler caps contain a pressure...Ch. 29 - What type of fire extinguisher should you have...Ch. 29 - What is the first thing that should be...Ch. 29 - Why is a plastic or metal restrictor placed in...Ch. 29 - Low fuel pump pressure causes a mixture and...Ch. 29 - True or False? Fuel pressure typically is at its...Ch. 29 - If fuel pump pressure or volume is less than...Ch. 29 - Which of the following statements about a fuel...
Ch. 29 - Low fuel pressure can be caused by all of the...Ch. 29 - If a fuel system loses pressure immediately after...Ch. 29 - List at least five safety precautions that should...Ch. 29 - Describe the operation of the evaporative system...Ch. 29 - True or False? On todays vehicles, an electric...Ch. 29 - Technician A says that excessively high pressure...Ch. 29 - Technician A replaces a damaged steel fuel line...Ch. 29 - While discussing electric fuel pumps: Technician A...Ch. 29 - To relieve fuel pressure on an EFI car: Technician...Ch. 29 - While discussing quick-disconnect fuel line...Ch. 29 - While discussing fuel filters: Technician A says...Ch. 29 - While discussing the various fuel filters used in...Ch. 29 - While discussing fuel tank filler pipes and caps:...Ch. 29 - While discussing electric fuel pumps: Technician A...Ch. 29 - While discussing electric fuel pumps: Technician A...
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- Technician A says that air-fuel ratios can be regulated by controlling the “on time” of the injectors. Technician B says that the air-fuel ratio can be regulated by controlling the pressure applied to the individual injectors. Who is correct?arrow_forwardTechnician A says that air-fuel ratios can be regulated by controlling the “on time” of the injectors. Technician B says that the air-fuel ratio can be regulated by controlling the pressure applied to the individual injectors. Who is correct? * 1 point a. Technician A b. Technician B c. Both A and B d. Neither A nor Barrow_forwardtechnician A says that the fuel tank cap has a valve to prevent pressure build up in the tank. Technician B says that the cap has a valve to prevent vacuum build up in the tank. Who is right?arrow_forward
- . Explain the purpose of the relief valve and one-way check valve in an electric fuel pump. What type of fire extinguisher should you have close by when you are working on fuel system components?arrow_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_forwardWhich of the following statement about carbon dioxide is not true? a. CO2 , levels are highest when the air fuel ratio is slightly leaner than stoichiometric. b. The production CO2 , is directly related to the amount of fuel consumed; therfore, more fuel efficient engines produce less CO2 c. To reduce CO2 , levels in the exhaust, engineers are working hard to decrease fuel consumption to keep CO2 low. d. The concern for CO2 emissions is on of the primary reasons for the delayed use of alternative fuels for automobiles.arrow_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_forwardBriefly describe and write the equation for incomplete combustion.arrow_forwardTrue or False: Carbon monoxide is produced by mixing vapors from nitrogen dioxide and sulfur dioxide.arrow_forward
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