Electrical/Electronic Systems
Work Example 1

WorkKey Level: 4
NATEF Automotive Task: VI.D.1

The specs for this alternator reads...puts out 90% of output. The alternator reads 112 amps and has a rated output of 135 amps.

a.  Is this within specs?

b.  What would the acceptable performance limit have to be in order for this to be an acceptable reading? 

c.  What would the alternator have to produce to be within 90% of the rated output?

Solution:

a.  No

b.  The acceptable performance limit would have to be approximately 82.9%.
(112 amps/135 amps = 0.8296296296...)

c.  The alternator would have to produce 121.5 amps.
(135 amps)(90%) = (135 amps)(0.90) = 121.5 amps