What purpose does the wastegate on a turbocharger serve, and how does it work?
What will be an ideal response?
A wastegate is designed to control boost pressure. Excessive boost pressure can damage an engine and too little boost pressure causes poor engine performance. The wastegate operates by redirecting exhaust gases around the turbine wheel instead of directly to it. This gives it the ability to limit the boost pressure developed. A diaphragm moved by boost pressure acts against a valve in the exhaust system. The diaphragm may be more precisely controlled by a solenoid spliced into the line connected from the intake manifold. This solenoid can operate under different programs from the PCM.
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What type of information can be found in the requirements section of the standards?
What will be an ideal response?
A boss is a circular raised surface on a casting, which is added to improve strength or provide a machining surface.
Answer the following statement true (T) or false (F)
A computer-controlled charging system is undercharging. A lab scope connected to the ground side of the alternator field indicates a 90 percent duty-cycle. Technician A says the alternator may need to be replaced. Technician B says the on-board computer may need to be replaced. Who is correct?
A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B
Which series U-joint has the greatest torque capacity?
A) 1310 B) 1350 C) 1480 D) 1260