To help its readers understand more about the ATA scheme, fast approaching its 5,000th accredited individual, recently launched trade publication, Auto Service & Repair, features 3 pages on the initiative in its May/June issue.
Examples of the on-line multiple test questions which form part of the accreditation are listed in the magazine and the answers are listed below:
Service Maintenance Technician Level
Q. The purpose of an antifreeze hydrometer is to:
Answer C - Compare the relative density of engine coolant to that of water.
Q. During a routine service, you are asked to check part of the charging system. What would this be?
Answer A - Check the drive belt for wear.
Q. Relays can be found in many ancillary vehicle equipment electrical circuits. Which statement defines a relay?
Answer D - An electro-magnetic switch.
Diagnostic Technician Level
Q. You have measured the voltage reading at the oxygen sensor signal wire with an oscilloscope. What voltage reading would you expect to see with the engine at a constant 2,000rpm? (there were no problems with the engine)
Answer A - Voltage oscillates constantly between 0.2 and 0.8 volts.
Q. When using an oscilloscope, what type of waveform should be produced from passive (magnetic/inductive) ABS wheel sensor with the wheel rotating?
Answer D - AC waveform.
Q. An electronically controlled common rail diesel fuel system uses a fuel pressure sensor. What is the purpose of the fuel pressure sensor within the fuel system?
Answer A - To monitor the fuel pressure in the common rail.
Master Technician Level
Q. European On-board Diagnostic (EOBD) is a system which constantly monitors a vehicle's emissions. How does the powertrain ECU monitor the efficiency of the catalyst?
Answer B - Two or more oxygen sensors are fitted to the vehicle. The ECU makes a comparison of the oxygen sensor signals. These sensors are situated upstream of the catalyst (S1) and downstream of the catyalyst (S2).
Q. The dwell algorithm of an ECU with DIS consists of two different modes. What are they?
Answer A - Crank mode and run mode.
How did you score? If you got most, if not all, the questions correct, you should consider putting yourself forward for the ATA accreditation, to show your customers that you are a skilled and competent technician.
To see the feature in Auto Service & Repair magazine click here (PDF)