Electromechanical Systems Exam Questions and Answers Latest Update 2025 Graded A+

Electromechanical Systems Exam Questions and Answers Latest Update 2025 Graded A+ Alternating current (ac) - Answers A source of electrical power in which electrons flow in one direction and then change course to flow in the opposite direction Armature - Answers The electromagnet in an electric motor that rotates within a magnetic field and creates the motor's torque Bifilar Construction - Answers A method of winding stator coils in which two separate wires are wound into the coil slots at the same time. The two wires are small, permitting twice as many turns as with a larger wire Brushes - Answers Carbon devices that rub against the commutator in an electric motor. When power passes through the brushes and commutator on its way to the armature, additional magnetic fields are created Commutator - Answers Part of a dc motor that switches current flow Comparator - Answers A control system element that compares the feedback signal from the controlled element to a reference signal or standard. The comparator develops a correction signal, if needed, which is sent to the control unit Compound-wound dc motor - Answers A type of dc motor that has two sets of field windings Control - Answers Devices that alter the flow of power and cause some type of operational change in the system, such as changes in electric current, hydraulic pressure, light intensity, or air flow Counter electromotive force (cemf) - Answers Voltage generated as the armature of a dc motor rotates. This voltage opposes the voltage applied to the motor Cycle - Answers Each repeated pattern of change in the direction of the flow of electrons in alternating current power Cycle timing system - Answers A type of timing system that turns a device on or off at specific intervals or in time with an operational sequence Dc stepping motor - Answers A type of dc motor in which the rotor is a permanent magnet. These motors are primarily used to change electrical pulses into rotary motion Delay timing system - Answers A type of timing system that provides a lapse in time before the load device actually becomes energized Detector - Answers A component of that sensing system responds to energy from the source and outputs a signal that is used to control the load device Detents - Answers An overload protection device comprised of two or more elements held in position by spring-loaded mechanisms. When placed under extreme stress, detents shift from their original position Digital system - Answers An automatic system that processes digital information. Numeric instructions are supplied to the system by magnetic tape, variations in pressure, temperature, or electric current. The numeric signals are decoded and directed to specific machines or machine parts, which then perform the necessary operations Direct current(dc) - Answers A source of electrical power in which electrons flow in only one direction Electric motor - Answers Component of an electrical system that converts electrical energy to mechanical energy in the form of rotary motion Electromechanical system - Answers A type of automated system in which power is transferred from one point to another through mechanical motion that is used to do work Error detector - Answers A component of servo systems that receives data from both the input source and the output device and compares that data to determine if a correction is needed Feedback - Answers A signal or data that provides information about the interaction between the control unit and the controlled element Field winding - Answers The coil wrapped around the electromagnet inside a dc motor Flux - Answers Strength of the electromagnetic field within a dc motor; directly affected by changes in the field current Indicator - Answers A subsystem that displays information about operating conditions at various points throughout the system Interval timing system - Answers A type of timing system that is used after a load is energized and operates using specified time intervals Light pipe - Answers Fiber-optic rods used in a transmission path to direct light energy around corners or to unusual locations Load - Answers The part or parts of an automated system designed to produce work Mechanical fuse - Answers Overload protection devices in the form of pins or tubes that break or buckle under extreme stress Permanent-magnet dc motor - Answers A type of dc motor in which the dc power supply is connected directly to the conductors of the rotor through the brush-commutator assembly. This type of motor is used when a low amount of torque is needed Preloaded springs - Answers Overload protection devices that respond to excess stress by releasing a spring that causes the end effector to break away from the work area