The engine brake will occasionally come on when pulling a hill. Technician A says the clutch switch may be faulty. Technician B says the master switch may be faulty. Who is correct? A. A only B. B only C. Both A and B D. Neither A nor B {Ans: D. Neither A nor B (If the engine brake engages while pulling a hill, the most likely problem is with accelerator pedal position sensor.)}A truck charges normally at higher RPMs but it is less than normal at idle. Technician A says there may be voltage drop on the negative side of the system. Technician B says there may be voltage drop on the positive side of the charging system. Who is correct? A. A only B. B only C. Both A and B D. Neither A nor B {Ans: D. Neither A nor B (Most likely, the alternator is spinning slower than needed at idle, which could be caused by an incorrectly sized alternator pulley.)}Which of the following should be done after installing a new copper injector sleeve? A. Heat it B. Dress it C. Ream the seat D. Coat it with a looking compound {Ans: C. Ream