Question

technician a says that a power balance test is a good way to narrow a misfire down to a particular cylinder(s). technician b says that a cylinder power balance test measures the volumetric efficiency of the cylinder being tested. who is correct? select one: a. technician a b. technician b c. both a and b d. neither a nor b

Explanation:

A power balance test is indeed used to identify which cylinder(s) are misfiring. It does this by disabling each cylinder one - by - one and observing the change in engine operation. If disabling a cylinder has little to no effect on engine operation, that cylinder is likely misfiring.

On the other hand, a cylinder power balance test does not measure volumetric efficiency. Volumetric efficiency is a measure of the amount of air - fuel mixture that enters the cylinder compared to the cylinder's swept volume. A power balance test is more about the contribution of each cylinder to the overall engine power output.

Answer:

a. Technician A