Description : How is the disadvantage of the Gramme-ring armature overcome in the drum-wound armature?
Last Answer : By winding the armature in a way that places the entire coil where it is exposed to maximum flux.
Description : Why are drum-type armatures preferred over the Gramme ring armature in modern dc generators?
Last Answer : Drum-type armatures are more efficient, because flux lines are cut by both sides of each coil.
Description : Which one is not present in AC generator: a. Armature b. magnet c. slip ring d. commutator
Last Answer : c. slip ring
Description : Armature reaction in a dc motor causes a shift of the neutral plane in which direction?
Last Answer : Opposite the rotation.
Description : What is armature reaction?
Last Answer : Distortion of the main field due to the effects of armature current.
Description : In single-phase alternators, in order for the voltages induced in all the armature windings to add together for a single output, how must the windings be connected?
Last Answer : In series.
Description : What is the most widely used combination-bias system?
Last Answer : The voltage-divider type.
Description : How many systems dealing with accounting applications have been widely accepted?
Last Answer : Six.
Description : What are the four widely used variations of the NRZ encoding method?
Last Answer : a. Non-return-to-zero level (NRZ-L). b. Enhanced non-return-to-zero level (E-NRZ-L). c. Non-return-to-zero mark (NRZ-M). d. Non-return-to-zero space (NRZ-S).
Description : Which of the eight methods for encoding digital data onto magnetic tape is most widely used because it’s accurate, simple, and reliable?
Last Answer : Non-return-to-zero (NRZ) encoding.
Description : What two features make the Huntron Tracker 2000 a widely used troubleshooting tool?
Last Answer : It eliminates the need for multiple pieces of test equipment and it is lightweight and portable
Description : What type of ac motor is most widely used?
Last Answer : Single-phase induction motor.
Description : What type of junctions are formed where the arms of a hybrid ring meet the main ring?
Last Answer : Basic E-type junctions.
Description : To propagate energy down an arm of a hybrid ring duplexer, the two fields at the junction of the arm and the ring must have what phase relationship?
Last Answer : 180 degrees out of phase
Description : Capacitive tuning by inserting a ring into the cavity slot of a magnetron is accomplished by what type of tuning mechanism?
Last Answer : . A cookie-cutter tuner
Description : Which topology (bus, ring, star, or tree) has a center hub interconnecting the equipments?
Last Answer : Star.
Description : What is the purpose of the guard ring in a megohmmeter?
Last Answer : Shunts leakage current, which prevents false readings
Description : A loss of field excitation to an AC generator while operating in parallel will cause it to ____________. A. absorb more and more load due to decreased armature reaction B. lose its load due to ... polarity D. lose its load, begin to motorize, trip out on reverse power relay, and possibly overspeed
Last Answer : Answer: D
Description : main function of the current regulator is A. To prevent the reversal flow of current from the battery when dynamo speed is drops. B. To safeguard against flow of high currents to battery when armature develops ... . C. To prevent building up of high voltage in a circuit. D. None of the above
Last Answer : B. To safeguard against flow of high currents to battery when armature develops more current.