Automotive Technology
7th Edition
ISBN: 9781337794213
Author: ERJAVEC, Jack.
Publisher: Cengage,
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Chapter 28, Problem 2TF
True or False? The diesel fuel’s antiknock quality is measured by the cetane rating.
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What is the testing procedure for diesel systems as outlined by the national environment protection (diesel vehicle emissions) measure?
The octane number of a fuel is the percentage of octane in that fuel.
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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?
Chapter 28 Solutions
Automotive Technology
Ch. 28 - Pump gasoline may contain a small amount of...Ch. 28 - List five advantages the use of piezoelectric...Ch. 28 - What does the Reid vapor pressure (RVP) test...Ch. 28 - List three alternative fuels for an internal...Ch. 28 - Why is the sulfur content in gasoline limited?Ch. 28 - What are oxygenates and why are they added to...Ch. 28 - Name three driveability factors that are affected...Ch. 28 - How does SCR lower the content in a diesels...Ch. 28 - Prob. 1TFCh. 28 - True or False? The diesel fuels antiknock quality...
Ch. 28 - True or False? Piezoelectric materials can emit a...Ch. 28 - Which of the following statements about hydrogen...Ch. 28 - Which of the following chemicals is commonly added...Ch. 28 - Technician A says that the use of methanol in...Ch. 28 - Technician A says that reformulated gasoline...Ch. 28 - Technician A says that dedicated vehicles are...Ch. 28 - Technician A says white smoke in the exhaust of a...Ch. 28 - Technician A says piezo material is a type of...Ch. 28 - Prob. 6ASRQCh. 28 - While discussing chemicals that are currently...Ch. 28 - While discussing common rail fuel injection...Ch. 28 - Technician A says diesel engines consume less fuel...Ch. 28 - While discussing the reasons why the use of E85...
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- Which of the following chemicals is commonly added to gasoline to increase its octane rating? a. Isooctane b. Heptane c. Sulfur d. Ethanolarrow_forwardHow does SCR lower the content in a diesels exhaust?arrow_forwardWhile discussing air-fuel ratios: Technician A says that a stoichiometric mixture is theoretically the best combination of fuel and air to provide for total combustion. Technician B says that a stoichiometric mixture always results in complete combustion. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor Barrow_forward
- While discussing chemicals that are currently added to refined gasoline in order to boost its octane: Technician A says methylcyclopentienyl manganese tricarbonyl (MMT) is normally added to gasoline. Technician B says ethanol can be added to boost the octane rating of gasoline. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor Barrow_forwarda) Discuss in detail any 4 locations within the diesel engine cylinder where unburnt HC emissions form.arrow_forwardHow the analyses and calorific values of fuels can be reported?arrow_forward
- gasoline volatility is being discussed. technician A says gasoline blended for summer use is more volatile than winter gasoline. technician B says in high altitude areas, fuel must be blended to have higher volatility.arrow_forwardAnswer each of the following questions regarding diesel engine compression testing: What is the procedure for conducting a diesel engine compression test? (10 - 20 words) Why must the test be done 'dry'? (10 - 20 words)arrow_forward3 Ways to extract diesel from a mixture and its step by step processarrow_forward
- 1) What is the testing procedure for diesel systems as outlined by the national environment protection (Diesel vehicle emissions) measure? 2) Discuss the danges of working with diesel. In your discussion outline the risks, effects of exposure and minimization strategies.arrow_forwardWhich 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.arrow_forwardAs an engines compression ratio increases, what should happen to the octane rating of the gasoline?arrow_forward
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