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S-92 - 2 - ELECTRICAL SYSTEM Exam 19 Questions with Answers,100% CORRECT

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S-92 - 2 - ELECTRICAL SYSTEM Exam 19 Questions with Answers Electrical output of the S-92A main generators? - CORRECT ANSWER Three-phase 115/200 VAC 420 Hz 60-75 KVA Peak of 90 KVA during emergencies. How are the two main AC Generators cooled? - CORRECT ANSWER Spray oil cooled from the main gearbox oil system. How is the APU Generator cooled? - CORRECT ANSWER Air Cooled. What frequency do the brushless AC generators produce at 105% Nr? - CORRECT ANSWER 420 Hz What is the KVA rating of the APU GEN? - CORRECT ANSWER 30-35 KVA with a peak of 45 KVA How is DC electrical power produced in the S-92A? - CORRECT ANSWER Through 2 primary 400 amp DC converters located in the nose electronics bay. A 125 amp backup converter in the #2 avionics rack will produce DC power if both primary converters fail. What external electrical power is available with the S-92A? - CORRECT ANSWER AC - 6 DC - 2 What indication is available to alert the pilot the external power is connected to the aircraft? - CORRECT ANSWER EXT PWR CONNECT - ADVISORY What electrical equipment is shed if only the APU GEN is supplying electrical system power? - CORRECT ANSWER WARM1 Air Windshield Heat (pilot side is recoverable) AVC RIPS #1 Engine Anti-Ice Matts Additionally: #2 A/C Compressor (if installed) and #2 Air Con Condenser fan (transparent to the pilot, no change in operation of the system) What indication is displayed if Engine anti-ice is on and the pilot windshield override switch is activated with only APU GEN electrical power available? - CORRECT ANSWER APU OVERLOAD - CAUTION What electrical equipment is lost if one main AC Generator fails? - CORRECT ANSWER NONE What is the procedure for the BATT HOT caution? - CORRECT ANSWER Land as soon as Practical. The Battery Hot Relay will automatically disengage charging of the battery from the #1 DC Converter, thus allowing it to discharge into its Utility and Holdup Busses and thereby cooling the battery. Above what temperature does the BATT HOT caution activate? - CORRECT ANSWER 70 C Above what temperature does the BATT HOT caution extinguish? - CORRECT ANSWER 63 C +/- 2 degrees What electrical equipment is lost if one DC Converter fails? - CORRECT ANSWER None The #1 DC Converter normally powers what busses? - CORRECT ANSWER (PUH) #1 DC Primary Batt Utility Batt Holdup The #2 DC Converter normally powers what busses? - CORRECT ANSWER #2 DC Primary DC Essential Battery After a dual DC Converter failure, the Backup Converter and Battery will power what busses? - CORRECT ANSWER B/U converter: Essential Battery Buses Battery: Utility Holdup Buses What avionics equipment in the cockpit is powered after a Dual DC Converter failure? - CORRECT ANSWER #3 and #4 MFD AHRS #1 RTU

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