Electrician's Mate 2nd Class Exam Flashcards
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Electrician's Mate 2nd Class Exam Flashcards

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Questions and Answers

Which of the following types of coupling is usually used to couple the output from a power amplifier?

  • Impedance
  • RC
  • Resistor
  • Transformer (correct)
  • Which of the following persons may inspect your record held by the Chief of Naval Personnel?

  • You
  • Your division officer
  • Both 1 and 2 above (correct)
  • Your designated agent
  • A circuit in which the resistance is almost zero ohms is referred to by which of the following terms?

  • Closed
  • Short (correct)
  • Open
  • Broken
  • The purpose of the CSMP is to provide shipboard maintenance managers with a consolidated listing of deferred maintenance to identify the material condition of the ship.

    <p>True</p> Signup and view all the answers

    Which of the following factors will NOT affect the value of inductance of a coil?

    <p>Conductor tensility</p> Signup and view all the answers

    In a zinc-carbon primary cell, what is the function of the carbon electrode?

    <p>To supply a return path for current</p> Signup and view all the answers

    On the ML-N, what information is in the column under COGNIZANCE CODE?

    <p>A code designating a segment of material for management by a specific inventory manager and the funding involved</p> Signup and view all the answers

    The Report and Disposition of Offense(s), NAVPERS 1626/7, contains all of the following information except?

    <p>All of the required pre-mast advice that must be given to the accused</p> Signup and view all the answers

    Which of the following statements is correct concerning D flip-flops?

    <p>The output is delayed up to one clock pulse</p> Signup and view all the answers

    What is/are the term(s) applied to the space between and around charged bodies in which their influence is felt?

    <p>Each of the above</p> Signup and view all the answers

    What term is used for a semiconductor that has three or more elements?

    <p>Transistor</p> Signup and view all the answers

    The speaker system of a record player should be driven by which of the following types of amplifier?

    <p>An audio power amplifier</p> Signup and view all the answers

    When a large aluminum terminal lug or splice is installed, why is it NOT necessary to clean the aluminum wire?

    <p>Oxide film does not form on aluminum</p> Signup and view all the answers

    Which of the following drugs is abused on the pretense of weight control?

    <p>Amphetamines</p> Signup and view all the answers

    Which of the following elements of the CRT helps prevent the beam of electrons from diverging?

    <p>Focusing anode</p> Signup and view all the answers

    What term applies to the difference between the speed of the rotating stator field and the rotor speed?

    <p>Slip</p> Signup and view all the answers

    Rapid reversals in the polarity of the line voltage applied to a capacitor will cause what type of capacitor power loss?

    <p>Dielectric-hysteresis</p> Signup and view all the answers

    A battery is rated according to a 20-hour rate of discharge at 300 ampere-hours. Which of the following currents is the maximum current that will allow the battery to deliver its rated capacity?

    <p>15 amperes</p> Signup and view all the answers

    Which of the following goals are related to FAP?

    <p>All of the above</p> Signup and view all the answers

    If signature authority has been delegated to the leading petty officer, which of the following documents is he/she NOT allowed to sign?

    <p>DD 214</p> Signup and view all the answers

    How are fixed capacitors classified?

    <p>By their dielectric materials</p> Signup and view all the answers

    What is the most common form of coupling?

    <p>RC</p> Signup and view all the answers

    What type of feedback is caused by interelectrode capacitance?

    <p>Negative</p> Signup and view all the answers

    The intensity knob on the spectrum analyzer controls what display function(s)?

    <p>Brightness of the CRT trace</p> Signup and view all the answers

    A megger uses high voltage to check the insulation leakage in the megohm range. What is the source of this voltage?

    <p>A hand-driven dc generator</p> Signup and view all the answers

    What is the major factor that limits the high frequency response of an amplifier?

    <p>Capacitance</p> Signup and view all the answers

    In generators, what principle is used to convert mechanical motion to electrical energy?

    <p>Magnetic induction</p> Signup and view all the answers

    Under which of the following conditions does sparking occur between the brushes and the commutator?

    <p>When there is improper commutation</p> Signup and view all the answers

    What is the purpose of the aquadag coating in the CRT?

    <p>It eliminates the effects of secondary emission</p> Signup and view all the answers

    What is the phase relationship between the output voltages of a three-phase alternator?

    <p>120º out of phase</p> Signup and view all the answers

    For maximum power transfer between circuits, what impedance relationship should there be between the two circuits?

    <p>The output impedance of circuit number one should be equal to the input impedance of circuit number two</p> Signup and view all the answers

    Which of the following terms describes a single resistor that represents a complex circuit?

    <p>Equivalent resistor</p> Signup and view all the answers

    Instructions for the preparation of a PMS feedback report are found on the reverse of OPNAVINST 4790/7B green page.

    <p>True</p> Signup and view all the answers

    A single-stage, two transistor amplifier that uses a phase splitter input is classified as what type of amplifier?

    <p>Push-pull</p> Signup and view all the answers

    What is the principal advantage of an indirectly heated cathode over a directly heated cathode?

    <p>It is immune to AC heater current variations</p> Signup and view all the answers

    Which of the following signal generators should you select to test audio equipment?

    <p>AF signal generator</p> Signup and view all the answers

    Color codes are used on preinsulated terminal lugs and splices to indicate what information?

    <p>The wire sizes on which they are to be used</p> Signup and view all the answers

    Showering will destroy nuclear and biological agents.

    <p>False</p> Signup and view all the answers

    Which of the following actions will recharge a secondary cell?

    <p>Connecting the negative terminal of a voltage source to the cathode of the cell and the positive terminal of the voltage source to the anode of the cell</p> Signup and view all the answers

    The LC choke-input filter is used primarily where which of the following types of regulation is/are important?

    <p>Voltage and current</p> Signup and view all the answers

    Control of a circuit requiring a temporary actuation signal is provided by which of the following switches?

    <p>Momentary</p> Signup and view all the answers

    This person acts as an overall training supervisor?

    <p>Executive Officer</p> Signup and view all the answers

    Which of the following gates produces a HIGH output when any or all of the inputs are LOW?

    <p>NAND</p> Signup and view all the answers

    Which of the following AC filament voltages is most likely to be considered a common voltage?

    <p>6.3 volts</p> Signup and view all the answers

    Qualified Personnel are assigned by name for each MR scheduled on the weekly schedule.

    <p>True</p> Signup and view all the answers

    Which of the following types of circuits are most affected by the loading effect of voltmeters?

    <p>High-resistance</p> Signup and view all the answers

    The meter card is used to provide what information concerning test equipment?

    <p>All of the above</p> Signup and view all the answers

    Which of the following safety precautions should be observed when an ohmmeter is used?

    <p>Deenergize the circuit before connecting the meter</p> Signup and view all the answers

    The amount of items listed on an EGL is no more than 8 hours.

    <p>False</p> Signup and view all the answers

    When directed drift takes place, at what speed does the effect take place?

    <p>186,000 miles per second</p> Signup and view all the answers

    Study Notes

    Coupling Types and Circuits

    • Power amplifiers typically utilize transformer coupling for output.
    • In electrical circuits, a "short" circuit is defined by almost zero resistance.
    • When aiming for maximum power transfer, the output impedance of one circuit must match the input impedance of the other.
    • An LC choke-input filter is designed for voltage and current regulation.

    Personnel and Records

    • Records held by the Chief of Naval Personnel can be inspected by both the individual and their designated agent, emphasizing transparency in personnel management.

    Capacitors and Electrical Components

    • High voltage checks for insulation resistance, typically using a megger, are derived from a hand-driven DC generator.
    • In capacitors, rapid polarity reversals lead to dielectric-hysteresis power losses.
    • Capacitance is the major limiting factor for the high frequency response of amplifiers.
    • Fixed capacitors are classified based on their dielectric materials.

    Electrical Safety and Maintenance

    • De-energizing circuits before connecting an ohmmeter is crucial to safety.
    • The intensity knob on a spectrum analyzer adjusts the brightness of the CRT display.
    • Observing safety protocols during meter use ensures accurate readings and protects equipment.

    Amplifiers and Feedback

    • The feedback type caused by interelectrode capacitance is classified as negative feedback.
    • A single-stage, two-transistor amplifier with a phase splitter is known as a push-pull amplifier.

    Chemistry and Electronics

    • In zinc-carbon batteries, the carbon electrode serves as a return path for current.
    • Amphetamines are often abused under the guise of weight control.

    Miscellaneous

    • The purpose of the aquadag coating in CRTs is to eliminate secondary emission effects.
    • The phase relationship between output voltages in a three-phase alternator is 120º out of phase.
    • Qualified personnel must be assigned by name for each maintenance requirement scheduled in the weekly agenda.
    • Documents like the DD 214 cannot be signed by a leading petty officer, emphasizing the importance of proper delegation and authority in military documentation.

    General Knowledge

    • Showering does not effectively neutralize nuclear and biological agents, underscoring the importance of specialized decontamination procedures.
    • The output configuration of gates affects their functionality, with NAND gates producing a HIGH output when any input is LOW.

    Conclusion

    • These concepts underline fundamental electrical engineering principles, safety protocols, and regulations essential for personnel management in the Navy, emphasizing clarity and understanding in each area.

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    Description

    Prepare for the Electrician's Mate 2nd Class exam with these mock exam flashcards. This quiz covers essential topics related to electrical coupling, personnel records, and circuit theory. Test your knowledge and readiness for the official exam.

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