AMT 112 prog 4 fill in the blank

Alternators used on large aircraft generally supply _____________ (how many) hertz ________________ (how many) phase alternating current

400 3

the alternating current produced in a DC alternator is changed into direct current with a ______ (solid-state or mechanical) rectifier

Solid State

If one lead from each winding of a three-phase alternator is connected to a common point, the stator is ________ connected and if the phases are connected end-to-end the stator is ________________ connected

Y or star Delta

The speed of an AC induction motor is determined by:

a. design b. applied AC frequency

identify these statements as true or false concerning the landing gear circuit shown in figure 7-64A a. all three landing gear must be down and locked before any of the down-and-locked lights will illuminate _______ b. the landing gear switch cannot be placed in the gear up position when the weight of the aircraft is on the landing gear. ______ c. if the landing gear is not down and locked, the warning horn will sound anytime the throttle is closed, regardless of the position of the landing gear switch ______ d. the pump motor cannot run in the gear up direction when the weight of the aircraft is on the landing gear _____

a. false b. false c. true d. true

the principle parts of a alternator are the:

a. rotor b. stator c. solid state rectifier d. brush assembly

three types of field-armature circuit arrangements used in DC motors are:

a. series wound b. shunt wound c. compound wound

the two basic types of large aircraft electrical bus distribution systems are the:

a. split bus b. parallel bus

the three types AC motors are the:

a. universal motor b. induction motor c. synchronous motor

Modern jet aircraft typically use an _____ cooled _____ (brush type or brush-less) alternator

air brush-less

Vibrator type voltage regulators with provisions for paralleling two generators have an extra _____________ that is connected to a paralleling switch or relay

coil

on jet aircraft a ________ ________ _______ unit is used between the engine and the alternator to assure constant frequency output

constant speed drive

the term __________ is often used to define a heavy current solenoid, such as the one used to energize the starter

contactor

series-connected DC motors have a _______ (high or low) starting torque

high

a reverse-current cutout relay _____________ (is or is not) necessary with a DC alternator

is not

on aircraft equipped with a _______ (split bus or parallel bus) systems, all generators connected to a common bus and share the load equally

parallel bus

an electrical schematic diagram shows the ________ (relationship or physical location) of all the electrical components and associated wiring in a particular system

relationship

Solid-state voltage regulators are usually ___________ (repaired or replaced) if they fail.

replaced

an aircraft starter uses a _______ (series or shunt) wound DC motor

series

Carbon brushes, riding on smooth ____________ ___________ carry the field current from the voltage regulator to the alternator rotor.

slip rings

the principle difference between DC generator and a DC alternator is that the magnetic field is _______ (stationary or moving) in a generator and _______ (stationary or moving) in an alternator

stationary moving

a ________ phase alternator is used for almost all aircraft applications

three

the only current that flows in the paralleling coils is that caused by the difference in the output ______ (voltage or current) of the two generators

voltage

a clipping diode may be installed across the coil of the master relay eliminate ____________ that could damage sensitivity electronic components

voltage spikes