ASE Practice Test #2 — Questions and Answers
Question 1: With an electronically controlled 4-speed automatic transaxle, you feel a “shock” while changing from Neutral to Drive. Which of these needs to be fixed away from the vehicle?
- Forward clutch (Correct answer)
- A/T fluid temperature sensor
- Line pressure test
- Control valve assembly
Correct answer: Forward clutch
A "shock" or harsh engagement when shifting from Neutral to Drive often indicates an issue with the forward clutch, which is responsible for engaging the drive gears. Problems with the forward clutch typically require transmission disassembly and removal from the vehicle for proper inspection, repair, or replacement.
Question 2: You are looking for an air leak inside the cylinder when you run an engine compression test. With the exception of which of the following, you will discover air leaks with this test?
- Cylinder head gasket
- Intake or exhaust valve
- PCV valve (Correct answer)
- Piston rings
Correct answer: PCV valve
An engine compression test measures the sealing integrity of the combustion chamber, identifying leaks past the piston rings, cylinder head gasket, or intake/exhaust valves. The PCV (Positive Crankcase Ventilation) valve is external to the combustion chamber and its function does not directly impact cylinder compression, so a leak there would not be detected by this test.
Question 3: What three clutch pedal measures are crucial?
- Pedal height, reserve and free play (Correct answer)
- Pedal reserve, kickback pressure and height
- Pedal reserve, operating range and free play
- Pedal height, free play and apply pressure
Correct answer: Pedal height, reserve and free play
Proper clutch operation depends on these three critical adjustments. Pedal height ensures comfortable and full engagement/disengagement. Free play (or slack) prevents premature clutch wear by ensuring the release bearing isn't constantly pressing on the pressure plate. Reserve (or clearance) ensures the clutch fully disengages when the pedal is pressed, preventing gear grinding.
Question 4: You want to identify a RWD, electronically controlled, 5-speed automatic transmission that makes an odd noise when in drive using your diagnostic symptom chart. Technician A needs to perform an OFF-vehicle procedure because he thinks the oil pump component may be to blame. It is the control valve, according to Technician B, and it requires an OFF-vehicle procedure. Who is accurate?
- Technician B
- Technician A (Correct answer)
- Neither technician
- Both Technician A and Technician B
Correct answer: Technician A
An odd noise specifically when the transmission is in drive often points to internal mechanical components. The oil pump is a critical mechanical component that operates continuously in drive and can produce noise if failing, requiring transmission removal (OFF-vehicle) for repair. While the control valve is also internal, it's less likely to be the direct source of a *noise* in drive compared to a failing pump.
Question 5: When a customer enters, they complain that the exhaust is spewing white smoke. Which system should you examine first for low fluid levels?
- Brake Master Cylinder
- Transmission
- Cooling System (Correct answer)
- Engine Oil
Correct answer: Cooling System
White smoke from the exhaust typically indicates that coolant is being burned in the combustion chambers. This usually points to a head gasket leak or a cracked cylinder head/block, allowing coolant to enter the engine. Therefore, the cooling system should be the first system checked for low fluid levels, as this is the most common cause.
Question 6: What should you do first when diagnosing an engine performance problem?
- Check for the symptoms in the service manual
- Road test the vehicle
- Retrieve any diagnostic trouble codes
- Discuss the concern with the owner of the vehicle (Correct answer)
Correct answer: Discuss the concern with the owner of the vehicle
Before performing any physical tests or retrieving codes, the absolute first step in diagnosing any vehicle problem is to thoroughly interview the owner. Understanding their specific observations, when the problem occurs, and any recent events provides crucial context and helps narrow down potential causes, guiding the diagnostic process effectively.
Question 7: What would cause the fluid in an automatic transmission to become varnished with a light to dark brown tint as you examine the fluid color?
- Oxidation from overfilling (Correct answer)
- Engine coolant contamination
- Water contamination
- Wear from friction material
Correct answer: Oxidation from overfilling
A light to dark brown, varnished appearance in automatic transmission fluid is a classic sign of oxidation. This often occurs when the fluid overheats, which can be exacerbated by overfilling. Overfilling causes the fluid to foam and aerate, leading to increased heat and accelerated oxidation, breaking down the fluid's properties.
Question 8: What parts of the valve train have the most potential to significantly increase engine noise?
- Worn crankshaft seal
- Worn rod bearing
- Worn or dirty rocker arms (Correct answer)
- Worn connecting rods
Correct answer: Worn or dirty rocker arms
Rocker arms are critical components in the valve train that transfer motion from the camshaft to the valves. When rocker arms become worn or dirty, excessive clearance can develop between them and other valve train components. This increased play results in a distinct, repetitive clicking or tapping noise that significantly contributes to overall engine noise, making them a primary source of audible issues.
Question 9: A technician A thinks that people still use paper service manuals today. According to technician B, you should always adhere to the suggested service practices listed in online service information. Who is accurate?
- Technician B (Correct answer)
- Technician B
- Neither technician
- Both technicians
Correct answer: Technician B
Technician B is accurate because modern automotive repair relies almost entirely on online service information. These digital resources provide the most current and comprehensive data, including updated procedures, specifications, and diagnostic flowcharts, which are essential for accurate and efficient repairs. While paper manuals were once standard, they are largely obsolete in today's fast-evolving automotive industry.
Question 10: What needs to be replaced while maintaining a hydraulic clutch?
- Pilot Bearing
- Clutch fluid (Correct answer)
- Clutch linkage
- Input shaft
Correct answer: Clutch fluid
A hydraulic clutch system uses fluid to transmit pedal pressure to the clutch release mechanism. Over time, this clutch fluid can absorb moisture and degrade, similar to brake fluid, which can lead to a spongy pedal feel or inefficient clutch operation. Regular replacement of the clutch fluid is a necessary maintenance step to ensure proper hydraulic function, consistent pedal feel, and the longevity of the clutch system components.
Question 11: A consumer complains that their engine isn't producing enough power. A sudden transformation occurred. The technician examines the vehicle and discovers that the engine coolant is low and that the exhaust is emitting white smoke. Which of the following explanations is most appropriate?
- Faulty main bearing insert
- Faulty valve guide
- Worn piston ring
- Cracked cylinder wall (Correct answer)
Correct answer: Cracked cylinder wall
A cracked cylinder wall allows engine coolant to leak directly into the combustion chamber. When coolant mixes with fuel and burns, it produces a characteristic white smoke from the exhaust. This issue also leads to a loss of compression and misfires, resulting in a significant reduction in engine power and a noticeable drop in coolant levels.
ASE Practice Test #2
With an electronically controlled 4-speed automatic transaxle, you feel a “shock” while changing from Neutral to Drive.
Which of these needs to be fixed away from the vehicle?