Automotive Technology
7th Edition
ISBN: 9781337794213
Author: ERJAVEC, Jack.
Publisher: Cengage,
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Chapter 4, Problem 4MC
To determine
The correct theory, between the two theories given by Technician A and Technician B.
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Students have asked these similar questions
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 B
Technician 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 B
What affects the efficiency of a catalytic converter?
exhaust quality
air/fuel ratio
its temperature
fuel quality
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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- Technician A says that the catalytic converter is used only to quiet the noise of the exhaust. Technician B says that the catalytic converter is used to alter the contents of the engines exhaust. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor Barrow_forwardWhile discussing the catalyst efficiency monitor: Technician A says that if the catalytic converter is not reducing emissions properly, the voltage frequency increases on the downstream HO2S. Technician B says that if a fault occurs in the catalyst monitor system on three drive cycles, the MIL will be illuminated. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardWhile 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_forward
- While discussing the proper way to test a catalytic converter: Technician A says that a pressure gauge can be inserted into the oxygen sensor bore and the backpressure caused by the converter measured. Technician B says that restrictions in the converter can be checked with a vacuum gauge while the engine is being quickly accelerated. Who is correct? a. Technician A only b. Technician B only c. Both A and B d. Neither A nor Barrow_forwardTechnician A says that an EGR valve that is stuck open can cause idle problems. Technician B says that a stuck closed EGR can increase HC emissions. Who is correct? a. Technician A only b. Technician B only c. Both A and B d. Neither A nor Barrow_forwardWhile 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 Barrow_forward
- True or False? Engine misfires can cause a catalytic converter to overheat.arrow_forwardTrue or False? All fuel cell vehicles have regenerative braking and 12-volt auxiliary systems.arrow_forwardExplain the steps involved in disconnecting a fuel line on a vehicle Multi port direct injection Gasoline direct injectionarrow_forward
- While checking the condition of a vehicles ATF: Technician A says that if the fluid has a burnt color or odor, the fluid has been overheated. Technician B says that a milky color indicates that engine coolant has been leaking into the transmissions cooler in the radiator. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardTechnician A says that vacuum hose routing for the entire vehicle is illustrated on the underhood decal. Technician B says that this decal illustrates emission system vacuum hose routing. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor Barrow_forwardWhile performing a cooling system service on a hybrid vehicle; Technician A says it may be necessary to disconnect the electric water pump. Technician B says it may be necessary to disable the high-voltage system before servicing the engine. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor Barrow_forward
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