Electrical Q&A

Motor Drives Define and describe motor drives. A motor drive is an electronic unit designed to control the speed of a motor using solid- state components. Motor drives may be AC or DC drives. In addition to turning motors on and off and providing overload protection, motor drives also provide …

DC Motor Operation Define motor and explain the electron flow motor rule. A motor is a machine that converts electrical energy into mechanical energy by means of electromagnetic induction. The electron flow motor rule is used to determine the direction of motion of a current carrying conductor in a magnetic …

Define relays and explain how they function. A relay is a device that controls one electrical circuit by opening and closing contacts in another circuit. Relays have traditionally been used in machine tool control, industrial assembly lines, and commercial equipment. Relays are used to switch starting coils in contactors and …

Electrical Safety State four factors that determine the severity of an electrical shock. The severity of an electrical shock depends on the amount of electric current in milliamps (mA) that flows through the body, the length of time the body is exposed to the current flow, the path the current …

DC Generator Components State the operating principle of how a DC generator produces electricity. DC generators operate on the principle that when a coil of wire is rotated in a magnetic field, a voltage is induced in the coil. The amount of voltage induced in the coil is determined by …

AC Generator Working State the purpose of each of the components used in an AC generator. AC generators consist of field windings, permanent magnets, an armature, slip rings, and brushes. Field windings are electromagnets used to produce the stationary magnetic field in a generator. An armature is the movable coil …

AC Motor Types Define AC motor and identify the main parts of an AC motor and state their operating functions. An alternating current (AC) motor is a motor that uses alternating current to produce rotation. The main parts of an AC motor are the rotor and stator. A rotor is …

Herein, we have covered several Solenoid related topics such as Electromagnets, Solenoid & its Characteristics, Solenoid Applications and their Troubleshooting in detail. Electromagnets Define the electromagnet and explain the left-hand rule. An electromagnet is a magnet whose magnetic energy is produced by the flow of electric current. The left-hand rule …

Herein, we have covered several questions answers related to Pushbutton, Selector Switch, Joystick, Limit Switch, Foot Switch, Pressure Switch, Temperature Switch, and Level Switch in detail. Industrial Pushbuttons Describe the different parts of pushbuttons and their functions. Pushbuttons are the most common control switches used on industrial equipment. An industrial pushbutton …

Herein, we have covered several Programmable Logic Controller (PLC) related topics such as Basic Rules of Line Diagrams, Line Diagrams—Signals, Decisions, and Action, and Logic Functions in detail. Basic Rules of Line Diagrams State the basic rules that determine how and where two or more loads are connected into a control circuit. No …

Herein, we have covered several Electrical instruments like Digital multimeter, Analog Multimeter, Clamp Meter, Megohmmeter, Oscilloscope, and Phase Sequence Indicator in detail. Safety Understand the stated rules for proper and safe use of hand and power tools. Tools should be kept in good working condition. Periodic inspection of tools helps …

Language of Control Identify the differences between pictorial drawings, wiring diagrams, schematic diagrams, line diagrams, block diagrams, and flow charts. A pictorial drawing is a drawing that shows the length, height, and depth of an object in one view. Pictorial drawings show physical details of an object as seen by …

Herein, we have covered basic Electrical questions related to Electrical Theory, Electric Circuits, Magnetism, and Power in detail. Electrical Theory State the three fundamental parts of an atom and identify their states of charge. The three fundamental particles contained in atoms are protons, neutrons, and electrons. A proton is a …

These questions are related to RL Series Circuit, RC Series Circuit, and RLC Series Circuit. These topics are covered in detail here: RL Series Circuit RC Series Circuit RLC Series Circuit Impedance in an AC Circuit 1. Define a series RL circuit: The combination of a resistor and inductor connected …

Transformers Questions and Answers for Interview These questions are related to the following topics: Transformer Working Principle Voltage Regulation of Transformer Efficiency and Losses in Transformer 1. What are the following relationships in an ideal transformer? a. Turns ratio and voltage ratio? The turn’s ratio is the same as the …