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ELECTRICAL ENGINEERING TECHNICAL INTERVIEW QUESTIONS AND VERIFIED ANSWERS|100% CORRECT|GRADE A+
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ELECTRICAL ENGINEERING TECHNICAL INTERVIEW QUESTIONS AND VERIFIED ANSWERS|100% CORRECT|GRADE A+
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ELECTRICAL ENGINEERINGTECHNICAL INTERVIEW QUESTIONS
AND VERIFIED ANSWERS|100%
CORRECT|GRADE A+
Understanding Direct and Alternating Currents - ANSWER An alternating current flows back and forth at
regular intervals, while electrons in a direct current flow in one direction.
Norton's Theorem and Ohm's Law - ANSWER Engineering basics used to simplify linear circuits and
understand the relationship between current, voltage, and resistance.
Generator vs. Alternator - ANSWER Generators have a stationary magnetic field, while alternators have a
rotating magnetic field inside conductor windings.
Determining Electrical Wire Size - ANSWER Evaluate load current, voltage, current capacity, and voltage
drop per meter to size wire based on NEC standards.
Analog and Digital Circuits - ANSWER Analog circuits convert analog signals to digital, while digital
circuits process only digital signals.
Active, Reactive, Apparent, and Complex Power - ANSWER Active power is delivered to the load, reactive
power bounces between load and source, apparent power combines active and reactive power, and
complex power is the vector sum of active and reactive power.
Electrical Wire Colors - ANSWER Black, red, blue, and yellow wires carry power; white and grey wires are
neutral; green wires are for grounding.
Troubleshooting Electrical Problems - ANSWER Diagnose systematically, checking connections and inputs
one by one until identifying the issue.
Sample Size for Testing Designs - ANSWER Test components at least as many times as they will be used in
the system to ensure accurate assessment.
, Types of Protection Circuits - ANSWER Fuses for low-voltage, circuit breakers for higher voltages, and
ground fault interrupters for electric shock protection.
Process for Designing and Installing Complex Electrical Systems - ANSWER Research client's needs and
goals, create preliminary design, discuss with supervisor, finalize design, meet with team to discuss
installation tasks
Transformer Humming Sound - ANSWER Due to magnetostriction causing vibrations in the core
Reverse Polarity Issue - ANSWER Occurs when the positive and negative connections are reversed,
leading to equipment damage or malfunction
Norton's Theorem Relevance - ANSWER Used to simplify complex electrical circuits into a single current
source and parallel resistance
Bandgap Circuit Function - ANSWER Maintains a constant voltage output despite temperature variations
Control System Options - ANSWER Options include open-loop, closed-loop, and digital control systems
Digital vs. Analog Circuit - ANSWER Digital circuits use discrete voltage levels, analog circuits have
continuous voltage levels. Digital circuits are more flexible
High-Tension vs. Super-Tension Cables - ANSWER Main difference is the voltage rating, with super-
tension cables having higher voltage ratings
Disadvantages of Low Frequency - ANSWER Includes larger equipment size, higher transmission losses,
and limited data transmission capacity
Reforming of VFD - ANSWER Process of restoring the DC bus capacitors in a Variable Frequency Drive to
their original state
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