If a shipboard AC generator experiences a...

Question 1 / 270705eccefa4bacbc34ba4d4816b

Question 1 of 270705eccefa4bacbc34ba4d4816b

If a shipboard AC generator experiences a failure to produce a voltage, what may be the cause?

Question 1 of 27070

If a shipboard AC generator experiences a failure to produce a voltage, what may be the cause?

🔍 Key Concepts

• AC generator excitation system and how voltage is initially built up • Difference between field circuit (rotor) problems vs armature (stator) or mechanical issues • What electrical condition is required for voltage to appear at the generator terminals

💭 Think About

• Ask yourself: which option would stop the generator from building ANY terminal voltage, even though it is turning? • Consider which choices describe a condition that affects operation under load versus a condition that prevents voltage from being generated at all. • Think about what would happen if the magnetic field in the rotor disappeared—what would the stator see?

✅ Before You Answer

• Verify which component actually creates the rotating magnetic field in an AC ship generator. • Check which option would result in no excitation current in the field windings. • Eliminate options that mainly affect performance under load rather than complete loss of output voltage.

Question 1 of 27070

If a shipboard AC generator experiences a failure to produce a voltage, what may be the cause?

an open in the rotor field circuit

the brushes shifting out of the neutral plane

excessive locked-rotor current

a rotating slip ring