The front oxygen sensor is located before the catalytic converter upstream and the rear oxygen sensor is located after the converter downstream. Newer more efficient systems also alter valve lift and duration. A loose or cracked gas cap is suspected. This sensor is best tested with a scanner, but can be tested for proper resistance and sweep with a ohmmeter. Download the Study Guide: - this guide contains test specifications, tasks lists, sample test questions, and training resources.
Auto Maintenance and Light Repair Certification Test G1 Objective: To identify and recognize those Maintenance and Light Repair Technicians who can demonstrate knowledge of the skills necessary to successfully perform the most common maintenance and light repair tasks. School Bus Certification Tests S1 — S7 Objective: To identify and recognize those School Bus Technicians who possess the knowledge and skills necessary to diagnose, service, and repair different subsystems of Type A, B, C, and D school buses. Electronic Diesel Engine Diagnosis Specialist L2 Certification: This difficult test is focused on the diagnosis of sophisticated engine performance problems on computer-controlled diesel engines. There is only one version of each practice run, so be sure not to waste your vouchers trying to get a different take on the same one. Both A and B D. Remember as you're eliminating answers, to eliminate answers that are correct and fit the question. Composite Vehicle: Many of the questions relate to a sample vehicle equipped with a composite diesel engine control system featuring a cross-section of electronic diesel engine control technology used by all engine manufacturers.
Then, you will have to complete the investigation using equipment. The multiple choice practice test questions simulate real life situations and examples that mechanics will run into on test day and on a daily basis. Technician A says the control module is receiving an invalid key signal. Check for a loose cap, if the cap is cracked it should be replaced with a cap that matches the manufacturer's specifications. A leaking fuel injector causes a rich fuel mixture.
Which answer listed below will create this condition? During a snap test, what should be the maximum O2 level of a good catalytic converter? This exhaust will burn an intake valve. Leaking valve seals produce blue gray exhaust. Download the Study Guides: The - this guide contains test specifications, tasks list, the Certification Test Reference document, sample test questions, and training resources. Truck Equipment Certification Tests E1 — E3 Objective: To identify and recognize those Truck Equipment Technicians who can demonstrate knowledge of the skills necessary to install, diagnose, service, and repair truck equipment and related support systems on all classes of trucks and tractors. A vacuum gauge is connected to a port on the intake manifold of an engine with poor performance. All of the above 4.
Unwanted resistance in the engine coolant temperature sensor circuit, would cause what condition? Neither A or B 46. Specific action tips to improve your score. Data line shorted to power or ground D. Neither A or B 5. Based on results of the study, the Board decided to discontinue these tests. Download the Study Guide: - this guide contains test specifications, tasks lists, sample test questions, and training resources.
Recertification: Estimators must retest every five years to retain their certification. None of the above 16. A faulty exhaust gas recirculating valve. They will set a code and illuminate the check engine light if a faulty or damaged gas cap is found of left loose. Download the Study Guides: - this guide contains test specifications, tasks lists, sample test questions, and training resources. Service Consultants: Tests A1 through A9 are intended for technicians who perform vehicle repairs. Which answer listed, would cause excessive Nox? There is an exhaust manifold leak upstream of the oxygen sensor D.
A fuel Injector leaking fuel D. Only works in open loop C. Automobile Technicians: The C1 certification test is intended for those who work as service consultants. All of the above 15. Download the Study Guide: - this guide contains test specifications, tasks lists, sample test questions, and training resources. Regular maintenance and oil changes are vital.
A spark tester does not fire when it is connected from the coil secondary wire to ground while cranking the engine. Technician A says the control module is receiving an invalid key signal. It works great on multiple choice exams like this. There are seniority and skill ladders just like in the corporate world, and you need every edge you can get to advance. Neither A or B 49. Download the Study Guides: - this guide contains test specifications, tasks lists, sample test questions, and training resources.
Carbon monoxide is the toxic compound that forms with partially burned fuel from rich fuel mixtures. A lean mixture exhaust condition B. Unlike subscription products, our material covers what you need to know without redundancy. For all classes, you'll have to take General Knowledge. Technician A says the cap contains a vacuum and pressure relief valve, a small crack in the cap will not illuminate the check engine light. Which answer listed below will create this condition? The last opportunity to take a certification or recertification P3, P9, or Engine Machinist test was the Fall 2010 testing administration.