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When checking the foot valve primary and secondary ports for leakage what is the allowable pressure difference? (Ans- It should not exceed a 5 pounds per square inch difference. At what pressure should the stoplight switch illuminate on air brake systems? (Ans- 6 pounds per square inch or less. When checking the stoplight switch what is the allowable leakage? (Ans- There should be no leakage. When checking the relay valve what is the allowable leakage at the exhaust port of the valve? ...

The compressor is rapidly cycling on and off on a CCOT air conditioning system. Technician A says this condition can be caused by a low refrigerant charge. Technician B says this could be caused by a faulty clutch cycling switch. Who is correct? (Ans- Both technicians are correct. Technician A says while performing a retrofit from R-12 refrigerant to R134a refrigerant, the refrigerant must be recovered into a dedicated cylinder, they cannot be mixed. Technician B says R-12 refrigerant fu...

Which of the following would be the correct tool to bench test a highpressure common-rail injector? A. Digital multi-meter (DMM) B. Test Light C. Fused Jumper wire D. Voltmeter (Ans- A. Digital multi-meter (DMM) (A DMM set on the Ohms scale can be used to measure the resistance of the coil) A diesel engine fails to reach operating temperature. Which of the following is the most likely cause? A. Stuck open thermostat B. Stuck closed thermostat C. Slipping fan drive belt D. Slipping fa...

What requires the highest level of skill in the collision repair industry and is market driven to a large extent? (Ans- Repairing frame and structural damage. What is betterment/depreciation when referring to collision estimating? (Ans- When items that are subject to wear and replacement, like worn tires, brake pads, batteries, belts, etc. are replaced and the customer is getting something "better" than they had before. Adjustments must be made in the price. What are some of the it...