Subelement T5 Group C

FCC Technician Class Exam Study Guide - 2014-2018 · Wikibooks

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    From Wikibooks, under CC BY-SA 4.0, as the source states it. This page at Wikibooks.

    Electronic principles: capacitance; inductance; current flow in circuits; alternating current; definition of RF; DC power calculations; impedance

    The Question Pool

    Question 1

    What is the ability to store energy in an electric field called?
    A. Inductance
    B. Resistance
    C. Tolerance
    D. Capacitance


    The correct answer is D.

    Question 2

    What is the basic unit of capacitance?
    A. The farad
    B. The ohm
    C. The volt
    D. The henry


    The correct answer is A.

    Question 3

    What is the ability to store energy in a magnetic field called?
    A. Admittance
    B. Capacitance
    C. Resistance
    D. Inductance


    The correct answer is D.

    Question 4

    What is the basic unit of inductance?
    A. The coulomb
    B. The farad
    C. The henry
    D. The ohm


    The correct answer is C.

    Question 5

    What is the unit of frequency?
    A. Hertz
    B. Henry
    C. Farad
    D. Tesla


    The correct answer is A.

    Question 6

    What does the abbreviation "RF" refer to?
    A. Radio frequency signals of all types
    B. The resonant frequency of a tuned circuit
    C. The real frequency transmitted as opposed to the apparent frequency
    D. Reflective force in antenna transmission lines


    The correct answer is A.

    Question 7

    What is a usual name for electromagnetic waves that travel through space?
    A. Gravity waves
    B. Sound waves
    C. Radio waves
    D. Pressure waves


    The correct answer is C.

    Question 8

    What is the formula used to calculate electrical power in a DC circuit?
    A. Power (P) equals voltage (E) multiplied by current (I)
    B. Power (P) equals voltage (E) divided by current (I)
    C. Power (P) equals voltage (E) minus current (I)
    D. Power (P) equals voltage (E) plus current (I)


    The correct answer is A.

    Question 9

    How much power is being used in a circuit when the applied voltage is 13.8 volts DC and the current is 10 amperes?
    A. 138 watts
    B. 0.7 watts
    C. 23.8 watts
    D. 3.8 watts


    The correct answer is A.

    Question 10

    How much power is being used in a circuit when the applied voltage is 12 volts DC and the current is 2.5 amperes?
    A. 4.8 watts
    B. 30 watts
    C. 14.5 watts
    D. 0.208 watts


    The correct answer is B.

    Question 11

    How many amperes are flowing in a circuit when the applied voltage is 12 volts DC and the load is 120 watts?
    A. 0.1 amperes
    B. 10 amperes
    C. 12 amperes
    D. 132 amperes


    The correct answer is B.

    Question 12

    What is meant by the term impedance?
    A. It is a measure of the opposition to AC current flow in a circuit
    B. It is the inverse of resistance
    C. It is a measure of the Q or Quality Factor of a component
    D. It is a measure of the power handling capability of a component


    The correct answer is A.

    Question 13

    What are the units of impedance?
    A. Volts
    B. Amperes
    C. Coulombs
    D. Ohms


    The correct answer is D.