During the diagnostic test procedure for a Catalyst Efficiency code, a diagnostic scan tool is connected to the DLC with the vehicle at operating temperature, and the data screen displays the pre-catalyst oxygen sensor continually switching between 200 mV - 800 mV, while the post-catalyst oxygen sensor's output voltage stays relatively steady at 700 mV. Technician A says that the post-catalyst oxygen sensor is fixed rich and should be replaced. Technician B says that the oxygen sensor readings are both normal. Who is correct?
While having a discussion, Technician A says that according to the Ford Motor Company, there are approximately 36,500 drops of oil in 1 quart. Technician B says that according to Ford, there are approximately 16,500 drops of oil in 1 quart. Who is correct?
Technician A says that an even firing V8 engine has a power stroke start every 90 degrees of crankshaft rotation. Technician B says that a four-cylinder engine will start a power stroke every 180 degrees of rotation. Who is correct?
Technician A says the diode check function of an ohmmeter is used to test semiconductors. Technician B says voltmeters are used to test semiconductors. Who is correct?
Technician A says seals that are incorrectly installed can cause a leak in a transfer case. Technician B says noises in a transfer case or a differential can be caused by bad bearings. Who is correct?
Two technicians are discussing torsion bars. Technician A says that many torsion bars are adjustable to allow for ride height adjustment. Technician B says that torsion bars are usually marked left and right and should not be switched side to side. Which technician is correct?
Technician A says that two sensors must be triggered at the same time for an airbag deployment to occur. Technician B says that frontal airbags only operate within 60 degrees from center and do not deploy in the event of a side or rear collision. Who is right?
Technician A says the RO is a legal document between the shop and the customer. Technician B says the RO should be well written, clean, and legible. Who is correct?
Technician A says a pulse width modulated solenoid can be found in some converter control systems. Technician B says a PM generator-type solenoid, which allows for full time but controlled slip, is used in some converter control systems. Who is correct?
A voltmeter was used to check the coolant and a reading of 0.2 volt with the engine off was measured. A reading of 0.8 volt was measured with the engine running and all electrical accessories turned on. Technician A says that the coolant should be flushed to solve the galvanic activity. Technician B says that the ground wires and connections should be inspected and repaired to solve the electrolysis problem. Which technician is correct?
Technician A says to use synthetic grease to lubricate the backing plate. Technician B says to use special lithium-based brake grease. Which technician is correct?
Technician A says to use a coarse sandpaper when cleaning bimetal engines with super-smooth cast iron block surfaces. Technician B says a sharp gasket scraper is recommended for use on machined aluminum. Who is correct?
Save a GPA. Donate your notes with us.
