The following are questions from the National Institute for Automotive Service Excellence (ASE) test for school bus technicians, which certifies technicians as the best in their industry. An air-operated stop arm will not fully extend. Which of these is the most likely cause? (A) Low air pressure (B) Binding hinge pivots (C) A sticking solenoid valve (D) A broken return spring pivot A replacement student window side glass should: (A) Meet FMVSS requirements (B) Be tempered (C) Be laminated (D) Be replaced by a glass company The automatic transmission fluid of a school bus is discolored and has an unusual odor. The most likely cause is: (A) Overrunning the engine governor (B) Overheating the transmission (C) A dragging spring (parking) brake (D) Improper gear selection The most likely cause for no air pressure in the secondary air resevoir tank is a/an: (A) Improperly adjusted air governor (B) Plugged one-way check valve (C) Weak pressure relief valve (D) Restricted compressor main discharge line All of these must be checked before aligning the front wheels on a school bus EXCEPT: (A) Tire pressure (B) Trim height (C) Wheel bearing adjustment (D) Tire balance Answers: (A), (A), (B), (B), (D)