Aircraft Electrical Systems - WRITTEN TEST QUESTIONS 2025 WITH CORRECT ANSWERS

Aircraft Electrical Systems - WRITTEN TEST QUESTIONS 2025 WITH CORRECT ANSWERS An aircraft electrical circuit control relay is.....? - An electrically operated switch. The inductor-type inverter output voltage is controlled by the.....? - DC stator field current What is the most accurate type of frequency-measuring instrument? - Integrated circuit chip having a clock circuit. The primary considerations when selecting electric cable size are? - Current-carrying capacity and allowable voltage drop. The over-voltage control automatically protects the generator system when excessive voltage is present by.....? - opening the shunt field circuit. An ammeter in a battery charging system is for the purpose of indicating the.....? - Rate of current used to charge the battery. If a generator is equipped with a vibrator-type voltage regulator, the actual time the voltage regulator points remain open.....? - Depends on the load carried by the generator. 2COPYRIGHT © 2025 BY GRACE AMELIA, ALL RIGHTS RESERVED A circuit protection device called a current limiter is essentially a slow-blow fuse and is designed to be used in.....? - Heavy power circuits. How can it be determined if a transformer winding has some of its turns shorted together? - The transformer will get hot in normal operation. How can the direction of rotation of a dc electric motor be changed? - Reverse the electrical connections to either the field or armature windings. Some electric motors have two sets of field windings wound in opposite directions so that the.....? - Motor can be operated in either direction. The type of electric wire terminals used for most aircraft applications, in addition to providing good current carrying capabilities, are designed primarily.....? - To prevent circuit failure due to terminal disconnection. What kind of switch should you install in a single wire circuit that required the switch to be manually held in the ON position? - Single-pole, single-throw (SPST), two- position normally open (NO). The most common method of regulating the voltage output of a compound dc generator is to vary the.....? - Current flowing through the shunt field coils. When handling a high voltage capacitor in an electrical circuit, be sure it.....? - Is fully discharged before removing it from the circuit. Which of the following copper electrical cable sizes should be selected to replace a No. 6 aluminum electrical cable? - No. 6 How many cycles of ac voltage are produced in a six-pole alternator of the revolving- field type for each revolution of the rotor? - Three (each pair of poles produces one cycle of AC) 3COPYRIGHT © 2025 BY GRACE AMELIA, ALL RIGHTS RESERVED When using an ohmmeter to check the continuity of a generator field coil, the coil should.....? - Show very low resistance if it is a series field coil. What does a rectifier do? - Changes alternating current into direct current. How is a shunt-wound D.C. generator connected? - Both fields are shunted across the armature. In aircraft electrical systems, automatic reset circuit breakers.....? - Should not be used as circuit protective devices. Electric circuits are protected from overheating by means of.....? - Fuses. In an A.C. circuit with no phase lead or lag, which is true? - Real power equals apparent power. In a generator, what eliminates any possible sparking to the brush guides caused by the movement of the brushes within the holder? - The brush pigtail. What is a cause of generator brush arcing? - Low spring tension