_ motion of plate A Linear Linear motion is equal to circular motion in terms of what? Velocity, acceleration, distance Fixed RPM causes varying ROR and ROD depending on what? Circumference In circular motion, V out is proportional to what? Acceleration What are 3 popular motion sensors? Photo interrupter, photo reflector, magnetic pickup What do position generators do? cause a change in position, use electrical input to produce mechanical output What do position sensors do? detect changes in position, use mechanical input to produce an electrical output Which position device rotates from one position to another according to digital\/analog input? Position generators Which position device receives mechanical input and produces analog\/digital signal output? Position sensor Define position location of object, defined in 1, 2, or 3 dimensions in respect to reference Torque and RPM depend on the of the shaft Radius
What constant is used in power calculations when HP need to be converted to FT-LBS? 9.55 (Torque X RPM)\/9.55
What constant is used in power calculations when HP need to be converted to ft-lbs? 5252.5 (Torque X RPM)\/5252.5
What are two types of resolvers? Induction and resistance
Resolvers use what type of motion? Circular
An induction resolver acts like which component? Transformer
Resistance resolvers are specifically designed ? Potentiometers
What are two types of digital position sensors? Increment and wheel
The shaft of which digital position sensor must return to 0 prior to each move Increment wheel
Which digital position sensor would have 4 sensors? Encoder wheel (gray or 8421)
What type of encoder wheel produces incorrect outputs during transition? How is this overcome? 8421, overcome by strobe track or using Gray code
In which speed controller does a low current control a high current motor? Relay controller
What are two types of starters? Series and parallel
A large start torque requires a start current Large
What type of controller is used in small DC motors with small currents? Solid state controllers (emitter follower)
What type of start\/speed controller uses D\/A converter and comparator array? Digital start\/speed controller
What are two types of controllers used by DC motors? Amplitude and Time control
What are 3 types of AC motors? Universal, induction, synchronous
Which AC motor is used for large HP or special applications? Synchronous
Induction type AC motors use what kind of rotor? Squirrel cage
What induces current in the rotor (AC motor)? expanding\/contracting stator mag field
What causes a magnetic field in rotor (AC motor)? Rotor current induced by stator mag field
How is slip speed calculated? Field speed minus shaft speed
What is field speed also known as (AC motors)? Synchronous speed
How is torque related to current? Proportional
Why does the rotor attempt to follow the stator? Magnetic attraction
Rotor RPM will always be than stator RPM LESS than (always lags)
How is shaft speed calculated? Field RPM minus slip RPM
“In AC motor which component is thought of as the “”primary”” and which is the “”secondary””?” Stator is primaryRotor is secondary
AC induction motor has _<\/em><\/strong> start torque SMALL
What is the purpose of synchros? To transfer angular information as voltage
Define synchros rotary electromechanical position sensing devices, movement of one device produces voltage that causes movement in another device
What are two main parts of synchro? Stator and rotor
How many stators does synchro use? 3 windings in Y config
What does TX stand for? Torque transmitter
What does TDX stand for? Torque differential transmitter
What does the torque receiver do? Electronically forced to reposition in response to applied voltage (from transmitter), provides mechanical motion
What control component is similar to torque receiver? Control transformer
What are 4 steps of troubleshooting synchro systems? Confirm symptom, remove power, isolate components, locate defect
What is a multimeter used to measure when troubleshooting synchros? Ohms
What fault will cause blown fuses or tripped circuit breaker? Short rotor
What fault causes transmitter to have little effect, receivers attempt to track, and low torque? Open rotor
An open in transmitter rotor will affect one device or whole system? Whole system
What fault causes all devices to point toward good stator axis? Short stator
A short stator in receiver will affect one device or whole system? Whole system
Define gyroscope? mechanical device containing spinning mass that is universally mounted
What gyroscope principle causes wheel to remain in fixed position if no force is applied? Rigidity
What principle of gyroscopes causes spin axis to turn at right angle to angle of applied force? Precession
What factors affect rigidity? Rotor weight and speed, and rotor shape (weight distribution)
Larger diameter of rotor equals (more\/less) rigidity? More
Rate of precession is proportional to what? Applied force<\/p>\n","protected":false},"excerpt":{"rendered":"ATT Test 11 (Latest 2024\/ 2025 Update) Questions and Verified Answers| 100% Correct| Grade A ATT Test 11 (Latest 2024\/ 2025 Update)Questions and Verified Answers| 100%Correct| Grade AQ: What characteristic is a twisting force that causes shaft to rotate?Answer:TorqueQ: How is torque calculated in generators?Answer:Force X Distance from center of shaftQ: How are torque and […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-131715","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/131715","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=131715"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/131715\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=131715"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=131715"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=131715"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}