ATT FC COMP TEST QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026

ATT FC COMP TEST QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026 What three factors determine the severity of an electric shock? - Answers 1) Amount of current flowing through the body, 2) Path of current through the body, 3) Length of time the body is in the circuit How much current can be lethal? - Answers 50-150 milliamperes How much more DC than AC does it take to freeze a body to a conductor? - Answers 5 times: 12 ma AC, 60 ma DC What are three types of burns? - Answers 1) Electrical, 2) Arc, 3) Thermal Contact What are three well-known examples of electrical protection devices - Answers 1) Fuse, 2) Circuit Breakers, 3) Ground-Fault Circuit Interrupters (GFCIs) Never use ____ or ____ to extinguish an electrical fire because they are electrically conductive substances. - Answers water, foam What are the 4 steps that should be taken in the case of an electrical fire? - Answers 1) de-energize, 2) call the fire department, 3) control / put out the fire, 4) report fire Schematic diagrams are drawn so that the date or signal flows through the circuit from ____ to ____. - Answers left, right What are the two methods to troubleshoot a circuit? - Answers 1) trial and error, 2) logical procedure What are the four steps to troubleshooting a circuit? - Answers 1) Analyze the circuit, 2) Check the setup, 3) Calculate and measure values, 4) Check the results. What are three characteristics of an open? - Answers 1) infinite resistance, 2) no circuit current, 3) measure applied voltage What are three characteristics of a short? - Answers 1) no resistance, 2) increases circuit current, 3) measures 0 voltage What are the three characteristics of a changed value? - Answers 1) resistance increases or decreases, 2) increases or decreases circuit current, 3) measures voltage other than calculated What is a representation of AC voltage or current? - Answers The sine wave ____ is determined by the number of cycles that occur in one second. - Answers Frequency What is the basic unit of measurement for frequency? - Answers the Hertz (Hz) ____ is the length of time required to complete one cycle of an AC sine wave. - Answers Period The symbol for period is ____? - Answers T Time is expressed as a ____. - Answers decimal part of a second The formula for period is ____. - Answers T = 1 / f ____ is the distance from beginning to end of one complete cycle of an AC sine wave. - Answers Wavelength The symbol for wavelength is ____. - Answers λ (lambda) Wavelength is expressed in ____ or ____. - Answers meters or centimeters The formula for wavelength is ____. - Answers λ = 300 x 10^6 / f - where f is Hertz A changed value component changes ____ and ____. - Answers ZT, IT A ____ eliminates the component from the circuit. - Answers short The purpose of a transformer is to ____. - Answers transfer power For transformers power in ___ power out. - Answers always equals The transformer schematic symbol uses two ____. - Answers inductor symbols What is the reference designator for a transformer? - Answers T In a transformer, the ____ receives the input voltage. - Answers primary coil In a transformer, the secondary coil receives the ____. - Answers induced voltage Transformers operate on the principle of ____. - Answers mutual inductance ____ transformers increase the applied voltage. - Answers Step-up ____ transformers decrease the applied voltage. - Answers Step-down What is the turns ratio formula? - Answers NP / NS - where N means number of coils What is the formula for the secondary voltage in a transformer? - Answers VP / VS = NP / NS What is the formula for the secondary current in a transformer? - Answers IS = VS / RL What is the formula for the secondary power in a transformer? - Answers PS = IS x VS What is the formula for the primary power in a transformer? - Answers PP = PS What is the formula for the primary current in a transformer? - Answers IP = PP / VP What is the ratio relationship formula in a transformer? - Answers NP / NS = VP / VS = IS / IP Open windings in transformers prevent ____. - Answers current flow Shorted windings in transformers provide a ____ path for current. - Answers low resistance Shorts in a transformer's primary ____ secondary voltage. - Answers increase Shorts in a transformer's secondary ____ secondary voltage. - Answers decrease Complete shorts in a transformer's primary ____ the input voltage. - Answers short out Complete shorts in a transformer's secondary ____ secondary voltage. - Answers eliminate ____ quickly determine if a transformer if operating normally. - Answers Voltage measurements The purpose of a junction diode is to ____. - Answers allow current flow in one direction only When forward biased, the diode acts as a ____. - Answers closed switch The schematic symbol of the junction diode is an ____ and a ____. - Answers arrow, bar In the schematic symbol of the junction diode, the ____ represents N and the ____ represents P. - Answers bar, arrow In a transistor, the amount of collector current is dependent on the ____. - Answers base bias voltage (base current) In a transistor, increasing the base bias ____ collector current. - Answers increases In a transistor, decreasing the base bias ____ collector current. - Answers decreases In a transistor, what is the point at which an increase in base voltage does not increase collector current? - Answers Saturation In a transistor, what is the point at which the base bias reverse biases the EB junction, stopping Ib and Ic current flow? - Answers Cutoff Alpha is the ratio of ____. - Answers collector current to emitter current. = Ic / Ie Beta is the ratio of ____. - Answers collector current to base current. = Ic / Ib Fixed-biasing drops Vcc to a level that forward biases the ____ and reverse biases the ____. - Answers EB junction, CB junction Fixed-biasing is ____ sensitive. - Answers temperature Self-biasing uses the voltage across RL to ____. - Answers supply base bias Self-biasing is not ____ sensitive, but it lowers the transistor's ____. - Answers temperature, ____ uses both fixed- and self-biasing. - Answers Combination biasing Amplification of an input signal in a transistor occurs because small changes in ____ cause large changes in ____. - Answers base bias, collector current Class A amplifiers are biased so that the input signal occurs ____. - Answers within the limits of cutoff and saturation Class A amplifiers have ____ and ____. - Answers high fidelity, low efficiency Class B amplifiers have the DC bias point ____ allowing ____ collector current for half of the ____. - Answers at cutoff, no, input signal Class B amplifiers have ____ and ____ - Answers medium fidelity, medium efficiency Class AB amplifiers have the DC bias point ____ so collector current flows for ____ - Answers above cutoff, more than 180* but less than 360* Class AB amplifiers have ____ and ____. - Answers medium fidelity, medium efficiency Class C amplifiers have the DC bias point ____ so collector current flows for less than ____. - Answers below cutoff, 180* Class C amplifiers have ____ and ____. - Answers low fidelity, high efficiency Overdriving an amplifier ____. - Answers distorts the output signal What are the three configurations of transistor amplifiers? - Answers 1) Common Emitter, 2) Common Collector, 3) Common Collector What type of transistor amplifier is the most commonly used? - Answers Common emitter amplifier What type of amplifier is used to match loads, has a high input resistance and a low output resistance. - Answers Common collector amplifier What type of amplifier is used to match loads, has a low input resistance and a high output resistance. - Answers Common base amplifier What is the input / output phase of a Common Emitter? - Answers 180* What is the input / output phase of a Common Collector? - Answers 0* What is the input / output phase of a Common Base? - Answers 0* What is the purpose of sine wave oscillators? - Answers They change DC energy into AC energy. Sine wave oscillators consist of what two circuits? - Answers Amplifier, Feedback The feedback circuit selects the ____ and ensures ____. - Answers frequency, phase is correct An oscillator's first output signal is the ____ from the resistors. - Answers noise The feedback circuit allows only one ____ to pass on to the input of the amplifier. - Answers frequency The amplifier amplifies the ___ and the process is ____. - Answers input, continued The output of the amplifier is limited by ____ and the ____. - Answers transistor saturation and cutoff