ASE P2 Practice Exam: Questions & Answers: Latest Updated Guide

Which product should be recommended for removing fuel varnish from a throttle body? (Ans - Aerosol throttle cleaner Counterman A says the heater control valve regulates the flow of coolant through the heater core. Counterman B says all A/C compressors use pistons to pump refrigerant through the A/C system. Who is right? (Ans - Counterman A only A/C condensers: (Ans - Are usually located in front of the radiator; receive high pressure refrigerant gas from the compressor; Cool the refrigerant so the gas will condense into a liquid The magnetic clutch on an A/C compressor: (Ans - Cycles on and off to drive the compressor An "orifice tube" in an A/C system does what? (Ans - Regulates the flow of refrigerant into the evaporatorCounterman A says the accumulator should always be replaced if an A/C system has been opened up for repairs. Counterman B says a plugged orifice tube is a common cause of compressor failure. Who is right? (Ans - Both Counterman A and B