Question

question 10 (8.7 points) technician a says that changing the alternator pulley to a smaller diameter pulley will allow more alternator output at idle. technician b says that during alternator replacement, you may need to reuse the old pulley. who is right? 1) technician a only 2) technician b only 3) both technician a and b 4) neither technician a nor b

Explanation:

• Technician A: A smaller - diameter alternator pulley increases the alternator's rotational speed at idle (since the belt speed is related to the engine speed, and for a smaller pulley, \(n_{alternator}=\frac{D_{engine}}{D_{alternator}}n_{engine}\), where \(n\) is the rotational speed and \(D\) is the diameter). Higher rotational speed of the alternator (which is an electromechanical device) generally leads to more output (as the output is related to the rotational speed of the rotor in the alternator).
• Technician B: In some cases, the old pulley may have specific characteristics (such as a particular groove design, diameter - matched to the vehicle's accessory drive system for proper belt tension and speed ratios) that make it necessary to reuse it during alternator replacement.

Answer:

1. Both Technician A and B