Read the entire question carefully before choosing your answer. Computerized Powertrain Controls Diagnosis C. C is also wrong because a stuck open thermostat will not cause overheating. Technician B says that the compressor mounting brackets and bushings should be checked. During a visual inspection an oily spot is found on a hose leading from the compressor.
Disconnect the liquid line from the evaporator inlet line and, using a twisting motion to break free of the line, pull out the orifice tube with an extractor tool. Manual Drive Train and Axles D. Inspect, test, and replace thermostat, by pass, and housing. As the mechanic career field expands into more and more complicated jobs involving complex electronic systems and computers right under the hood, become more demanding and require a higher level of expertise. What do the readings indicate? Of course, preparing for your A7 test is one of the most important things you can do to maximize your chances of passing. Neither A or B 1. B is not a most likely cause because a restriction heater core will cause no heat but not necessarily cause an engine overheat.
Many people find that taking a practice test not only helps with their ability to recall facts, it also calms nerves on exam day. Charging System Diagnosis and Repair E. The air flowing in the duct past the tube creates a vacuum, drawing in-vehicle air past the sensor. A customer complains about a hissing noise coming from under the hood after turning off the car. The outside air temperature is preventing compressor clutch operation.
These articles, questions and comments are very time consuming so even a small donation gives me motivation to keep educating automotive owners. Verify correct operation of certified equipment. Thank you for the help. One hose that is significantly cooler than the other would indicate a clogged heater core. Steering Systems Diagnosis and Repair B. Choose any of the free A1-A8 tests to practice showing off your knowledge and mechanic skills for free to know where you stand! Keep this in mind and eliminate answers that are most likely to fit the question. Diagnose temperature control system problems; determine needed repairs.
Answer option A is wrong because high high-side and low low-side pressure generally indicates a restriction evaporator air flow. Both A and B The correct answer is D The hissing noise is normal and caused by high-side pressure going through the refrigerant metering device as system pressures equalize. A disengaged clutch type radiator fan C. Neither A or B The correct answer is C The in-vehicle temperature sensor is located in the aspirator, which is located in the dashboard. Closer inspection and testing will be necessary. Inspect, test, and replace heater water valve and controls. The A Series is the cert for Automobile and Light Truck Master Automobile Technician status, and is made up of nine tests, the first eight of which are required for getting certified.
Incorrect answer, please choose another answer. Skip the repair shop, our top-rated mechanics come to you. If the area is contaminated with refrigerant or other gases, use a fan or compressed air to blow the excess refrigerant away. This is important because test takers have an average of one minute to answer each question and can easily fall behind. The answers to the Practice Test questions contain thorough explanations for each answer.
It is harmful to the ozone layer. The correct answer is C Excessive engine heat affects the ability of the condenser to transfer heat, therefore answer A is incorrect. If an orifice tube breaks during removal, special tools are available to extract broken orifice tubes. Two technicians are describing heater diagnosis. When we add new questions, you get them Free! Inspect and replace orifice tube s. Use this method to improve the probability of answering questions on multiple choice exams correctly. A stuck open cooling system thermostat The correct answer is B A disengaged clutch cype radiator fan would not cause low heater output.
A clogged radiator is the most likely cause because a restriction of any kind in the cooling system will cause an engine to overheat. Pass the probe around the top of components and hoses as refrigerant is lighter than air and tends to rise. Both A and B D. Martin has future plans of automotive diagnostic software development. The computer may decide to temporarily shut down the compressor to prevent engine stalling or low idle speed, or it could also raise idle speed through control of an idle speed control device. However, always check the compressor mounting and brackets before condemning the compressor for noise.
Both A and B D. This changes the normal flow, because with this question the correct answer is something that doesn't fit. All of the other answers are methods of orifice tube replacement. This is a least likely type question. Technician A says that the door does not move because it is binding or obstructed.
Engine Block Diagnosis and Repair D. Inspect, test, adjust or replace climate and blower control sensors. The correct answer is C Desiccants are not universal and different types must be used with different refrigerants and lubricating oils. Tests are administered morning, afternoon, evenings, and weekends according to availability. Related Suspension and Steering Service D. Heating and Engine Cooling Systems Diagnosis and Repair 4 questions a. Instrument Cluster and Driver Information Systems Diagnosis and Repair G.