What would be the effect of carrying field excitation excessively high on a synchronous motor?

Correct Answer: Option B — a tendency for the motor to overheat

Excessive DC field excitation in a synchronous motor causes over-excitation, leading to high reactive currents, excessive $I^2R$ heating in the rotor windings, and thermal degradation. Under IEEE 45 and 46 CFR Subchapter J, maintaining proper excitation prevents destructive thermal overload while managing power factor.