ASE Practice Test #3
You will conduct all of the tests listed below while conducting preliminary diagnostics on an electronically controlled automatic transmission, EXCEPT:
Explanation:
It is not necessary to check the flex plate during the preliminary diagnosis process. The flex plate check would only be necessary if there is a knocking noise similar to a bad rod bearing. To perform the flex plate check, you would need to remove the torque converter bolts and slide it back which reveals the flex plate.
Which of the following diagnostic techniques, which doesn't require manufacturing electrical standards, is the best for figuring out whether you have a bad fuel injector?
Explanation:
A fuel injector that tests significantly above or below the others is probably defective, even though it is usually prudent to compare electrical readings to manufacturer specifications. Before completing a repair, more testing can be performed to confirm the diagnosis.
These claims about an air conditioning performance test are all accurate EXCEPT for:
Explanation:
In reality, the reverse is true. You should switch the system to FRESH mode if you want to prevent evaporator stink. The remaining three options are all accurate.
Someone expresses concern about their car's harsh shifting. First gear is when it's most noticeable. The first speed-blocking ring, according to technician A, is the most likely culprit. Technician B decides that the clutch needs an adjustment. Who is accurate?
Explanation:
Hard shifting and other shifting issues can be brought on by an out-of-adjusted clutch. The lower gears would also be where you would notice it the most. Tech A is wrong because a faulty blocking ring shouldn't make first gear shifting difficult.
What is the most likely reason if you hear a flapping noise towards the front of an engine?
Explanation:
Your most likely cause is a loose timing belt. The fluttering sound it makes close to the front of the engine is frequently used to identify it. You will typically hear a squeaking sound instead when the drive belt is excessively loose.
With the temperature selector set to cool and the vent position, incoming air is heated. What could be the issue?
Explanation:
There would be little or no heat if the heater core was clogged. The car would overheat if the cooling fan wasn't functioning. Low coolant levels would also cause it to overheat.
All of the following could happen if the automatic transmission selection linkage is misaligned, WITH THE EXCEPTION of:
Explanation:
It is not required to verify the flex plate during the early diagnosis phase. Only if there is a knocking noise resembling a faulty rod bearing would the flex plate inspection be required. You would need to take off the torque converter's bolts and slide it back to uncover the flex plate in order to check the flex plate.
Before performing an engine compression test, the fuel injection and ignition systems must be turned off for a variety of reasons. Which of these is the least significant justification?
Explanation:
All of these are good reasons to turn off the ignition and fuel injection systems, but safety should always come first. Although precise measurements are crucial, that wasn't the question's main focus.
What information is required when searching for vehicle details particularly for a customer?
Explanation:
You will need the make, model, and year of the car in question in order to access data services. You won't have adequate information from the model year and the construction date of the vehicle. Additionally, you won't need the VIN to get this information.
What is the MOST probable explanation for a customer's complaint regarding a broken transmission case, rear extension housing mating surface, or center adapter plate?
Explanation:
With a damaged gearbox case, you would detect an oil leak. It may also be a sign of a broken center adapter plate or rear extension housing mating surface. These broken pieces would prevent the other things from happening.
The surface of the cylinder head has been machined. What work is required on the valve train?
Explanation:
You must adjust for the change once the distance between the pushrod and rocker has been decreased. If you were worried about piston to valve clearance, you would shim the head. Increasing the valve spring tension might be a suitable approach to prevent floating valves at higher RPMs.
