Automotive Technology
7th Edition
ISBN: 9781337794213
Author: ERJAVEC, Jack.
Publisher: Cengage,
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Textbook Question
Chapter 33, Problem 6ASRQ
While discussing automotive emissions: Technician A says that oxygen emissions are monitored because they are an indication of the completeness of the combustion process. Technician B says that the conditions for minimizing HC emissions are the same as those that cause high NOx emissions. Who is correct?
a. Technician A only
b. Technician B only
c. Both A and B
d. Neither A nor B
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Chapter 33 Solutions
Automotive Technology
Ch. 33 - Explain why a small PCV valve opening is adequate...Ch. 33 - At what temperature do nitrogen atoms combine with...Ch. 33 - Describe the operation of a digital EGR valve.Ch. 33 - Name the three types of emissions being controlled...Ch. 33 - The PCV system prevents from escaping to the...Ch. 33 - In a negative backpressure EGR valve, if the...Ch. 33 - Describe how a selective catalytic reduction...Ch. 33 - HC emissions may come from the tailpipe or...Ch. 33 - What types of catalyst are typically used to...Ch. 33 - Why is a PCV system critical to an engines...
Ch. 33 - What is a catalyst?Ch. 33 - Rather then rely on the AIR system for extra...Ch. 33 - Why do the EGR systems on many late-model diesel...Ch. 33 - Which of the following systems is designed to...Ch. 33 - Which of the following statements about carbon...Ch. 33 - While discussing PCV valve operation: Technician A...Ch. 33 - While discussing EGR systems with a differential...Ch. 33 - While discussing evaporative (EVAP) systems:...Ch. 33 - Technician A says that an EGR valve that is stuck...Ch. 33 - While discussing SCR systems: Technician A says...Ch. 33 - While discussing automotive emissions: Technician...Ch. 33 - Technician A says that during oxidation, as NOx...Ch. 33 - While discussing PCV systems without a PCV valve:...Ch. 33 - While diagnosing the cause of high HC and O2...Ch. 33 - While discussing electric exhaust gas...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Technician A says that black exhaust smoke is an indication of a too-rich air-fuel mixture. Technician B says that white smoke (steam) is an indication of coolant being burned in the engine.arrow_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_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
- While discussing the MIL on OBD II systems: Technician A says that the MIL will flash if the PCM detects a fault that would damage the catalytic converter. Technician B says that whenever the PCM has detected a fault, it will turn on the MIL. Who is correct? a. Technician A • Technician B • Both A and B • Neither A nor Barrow_forwardTechnician A says that you may be able to smell antifreeze from a leaking heater core. Technician B says that you may be able to hear a loose belt when the engine is running. Who is correct? Select one: a. Technician A only b. Technician B only c. Both A and B d. Neither A nor Barrow_forwardTechnician A says that the PCM illuminates the mil if a defective causes emission levels to exceed 2.5 times the emission standards for that model year vehicle. Technician B says that if a misfire condition threatens engine or catalyst damage, the PCM flashes the mil. Who is correctarrow_forward
- While diagnosing the cause for blue smoke from the tailpipe of a gasoline engine; Technician A says that a faulty fuel injection system is a likely cause. Technician B says that it is most likely caused by coolant leaking into the combustion chamber. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardWhich of the following statements regarding the “Pre-Emission Inspection Check” Of a diesel powered vehicle that is subject to Opacity (Smoke Meter) testing is not true? The governor (if equipped), the exhaust system, and the emissions control devices must all be checked. The exhaust system must be checked for any missing sections which would prevent collection of a valid exhaust sample. Vehicles not meeting requirements cannot be inspected. This is not considered an inspection or rejection and no fee is to be charged. The governor, if originally equipped, must be checked for presence, connection, and operation.arrow_forwardWhile discussing EFI systems: Technician A says that the PCM provides the proper air-fuel ratio by controlling the fuel pressure. Technician B says that the PCM provides the proper air-fuel ratio by controlling injector pulse width. Who is correct? * 1 point a. Technician A b. Technician B c. Both A and B d. Neither A nor Barrow_forward
- fuel additive are being discussed. technician A says adding oxygenates to gasoline increases fuel economy. technician B says adding 10 percent ethanol to gasoline may boost the octane rating 2.5 to 3 points. who is correct?arrow_forwardIncomplete combustion is permitted because a significant amount of heat is still generated. true of falsearrow_forwardTechnician A says that the PCV system is designed tolimit CO emissions. Technician B says that catalyticconverters reduce HC emissions at the tailpipe. Whois correct?a. Technician Ab. Technician Bc. Both A and Bd. Neither A nor Barrow_forward
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