AMT SECTION 3 QUESTIONS AND ANSWERS WITH SOLUTIONS 2024

AMT SECTION 3 QUESTIONS A ND ANSWERS WITH SOLUTIONS 2024 What is the frequency of an A.C. generator dependent upon? - ANSWER RPM Install a switch independent of the position light switch - ANSWER must be accomplished when installing an anti -collision light The series motor should be connected to its load prior to starting - ANSWER to prevent the motor from overspeeding. An aircraft is equipped with a solid state dimming circuit for the instrument panel lights. if one of the instrument lights is shorted to ground. - ANSWER The dimmer control transistor will fail A constant speed drive (CSD) unit drives a generator through the use of - ANSWER a variable displacement hydraulic pump and hydraulic motor. A constant speed D.C. motor is - ANSWER shunt wound. The three basic types of D.C. motors are - ANSWER compound wound, series wound, and shunt wound. Counter EMF is - ANSWER the voltage induced in the armature due to its rotation in the field motor that can be operated on either A.C. or D.C. current is called a - ANSWER universal motor. One of the chief advantages of alternating current is that is can be transmitted at a high voltage with a low power loss; the voltage can then be changed to any desired value of - ANSWER A.C. by means of transformers. Strobe and rotating beacon - ANSWER are two of the most common types of anti -collision lights. (8803) Some electric motors have two sets of field windings wound in opposite directions so that - ANSWER the motor can be operated in either direction. How is a constant frequency maintained on aircraft equipped with A.C. generators? - ANSWER By use of a constant speed drive (CSD) unit Brushless A.C. generator - ANSWER is best suited for high altitude operation by jet aircraft. Many transport aircraft use A.C. electrical power for all normal operation and battery furnished D.C. electrical power for standby emergency use. In aircraft of this type that operate no D.C. generators, the batteries are kept charged by - ANSWER rectifier s to convert A.C. to D.C. power. The output voltage of the A.C. generator is best controlled by regulating the - ANSWER voltage output of the D.C. exciter. A growler is used to check for - ANSWER a shorted armature. (8806) High starting torque - ANSWER is a series wound D.C. motor's greatest strength. When classifying motors according to duty cycle, they are classed as - ANSWER intermittent or continuous. A battery / generator system produces D.C. On aircraft with battery / generators when alternating current is needed, it is necessary to have ———— to convert D.C. to A.C. - ANSWER an inverter When testing a D.C. motor, the following procedures are performed - ANSWER 1. An ohmmeter is used to test for a ground between the armature windings and the core. 2. The field coil may be tested with an ohmmeter for opens and grounds. allowable colors for an anti -collision light - ANSWER red or white A tachometer indicator would use - ANSWER a synchronous type motor.