Question 85Electricity/Electronics - 1st Asst/Chief70% to pass
Which of the listed temperature measuring devices installed on a large turbo-electric alternating current propulsion generator would be the most reliable for monitoring generator temperatures to avoid premature winding insulation failure?
AI Explanation
The correct answer is D. Temperature sensors inserted in the stator slots for measuring stator winding temperature are the most reliable means of monitoring generator temperatures to avoid premature winding insulation failure.
This is because the stator windings are the most critical component for monitoring generator temperature, as overheating of the windings can lead to insulation failure and potential generator damage. Temperature sensors installed directly in the stator slots provide the most accurate and reliable temperature reading of the windings themselves. The other options, such as monitoring cooling air or water temperatures, are less direct and may not accurately reflect the winding temperatures.
Related Questions
#83 To properly use a clamp-on type ammeter to check current flow, what must be done FIRST? #84 Why are external shunts sometimes used with ammeters? #86 An electric propulsion drive system in which the propulsion generator supplies power to both the propulsion motor and ship service loads is referred to as what type of system? #87 Propulsion AC generators creating 4160 VAC use transformers to provide nominally 120 VAC to the automatic voltage regulator. What is the turn’s ratio of this step-down transformer? #88 Which of the listed devices is most likely to be installed on a large modern diesel- electric alternating current propulsion generator for commercial ship propulsion for the purposes of fire suppression?