Short Answer Flashcards
7 cards from real ASE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Short Answer flashcards as text
What is the purpose of the PCV (Positive Crankcase Ventilation) valve?
Answer: Route crankcase blow-by gases back to the intake to be burned
The PCV valve meters blow-by vapors from the crankcase into the intake so they are reburned instead of vented.
A technician finds milky, light-brown oil on the dipstick. What does this most likely indicate?
Answer: Coolant mixing with the engine oil
A milky appearance means coolant has entered the oil, often from a blown head gasket or cracked component.
Which type of transmission uses a torque converter instead of a clutch to transfer engine power?
Answer: Automatic transmission
An automatic transmission uses a fluid-coupling torque converter rather than a driver-operated clutch.
What is the recommended first step before working on any high-voltage hybrid or electric vehicle system?
Answer: Disable and isolate the high-voltage system per the service procedure
High-voltage systems must be properly de-energized and isolated using the manufacturer's procedure before service.
A customer reports a steering wheel shimmy felt mainly at highway speed. What is the most common cause?
Answer: Out-of-balance front tire/wheel assembly
Speed-related steering shimmy is most commonly caused by an unbalanced front wheel assembly.
In the OBD-II system, what does a P0420 code generally indicate?
Answer: Catalyst system efficiency below threshold (Bank 1)
P0420 means the catalytic converter on Bank 1 is operating below its efficiency threshold.
What tool is used to accurately measure the thickness of a brake rotor to determine if it can be resurfaced?
Answer: Micrometer
A micrometer measures rotor thickness so it can be compared against the discard specification.