FCC Element 3 FINAL EXAM
3-1A4 What device is used to store electrical energy in . Capacitor.
an electrostatic field?
3-1A5 What formula would determine the inductive XL = 2f L
reactance of a coil if frequency and coil inductance are
known?
3-1A6 What is the term for the out-of-phase power Reactive power.
associated with inductors and capacitors?
3-2A1 What determines the strength of the magnetic The amount of current.
field around a conductor?
3-2A2 What will produce a magnetic field? A current flowing through a conductor.
3-2A3 When induced currents produce expanding Lenz's law.
magnetic fields around conductors in a direction that
opposes the original magnetic field, this is known as:
3-2A4 The opposition to the creation of magnetic lines Reluctance.
of force in a magnetic circuit is known as:
3-2A5 What is meant by the term "back EMF"? A voltage that opposes the applied EMF.
3-2A6 Permeability is defined as: The ratio of magnetic flux density in a substance to the magnetizing force that
produces it.
3-3A1 What metal is usually employed as a sacrificial Zinc bar.
anode for corrosion control purposes?
3-3A2 What is the relative dielectric constant for air? 1
3-3A3 Which metal object may be least affected by Stainless steel propeller shaft.
galvanic corrosion when submerged in seawater?
3-3A4 Skin effect is the phenomenon where: RF current flows in a thin layer of the conductor, closer to the surface, as
frequency increases.
3-3A5 Corrosion resulting from electric current flow Galvanic corrosion.
between dissimilar metals is called:
3-3A6 Which of these will be most useful for insulation Mica.
at UHF frequencies?
, FCC Element 3 FINAL EXAM
3-4A1 What formula would calculate the total LT = L1 + L2
inductance of inductors in series?
3-4A2 Good conductors with minimum resistance have Many free electrons.
what type of electrons?
3-4A3 Which of the 4 groups of metals listed below are Gold, silver, and copper.
the best low-resistance conductors?
3-4A4 What is the purpose of a bypass capacitor? It removes alternating current by providing a low impedance path to ground.
3-4A5 How would you calculate the total capacitance CT = C1 + C2 + C3.
of three capacitors in parallel?
3-4A6 How might you reduce the inductance of an Reduce the number of turns.
antenna coil?
3-5A1 What are the two most commonly-used Maximum forward current and PIV (peak inverse voltage).
specifications for a junction diode?
3-5A2 What limits the maximum forward current in a The junction temperature.
junction diode?
3-5A3 MOSFETs are manufactured with THIS protective Zener diode.
device built into their gate to protect the device from
3-5A4 What are the two basic types of junction field- N-channel and P-channel.
effect transistors?
3-5A5 A common emitter amplifier has: . More voltage gain than a common collector.
3-5A6 How does the input impedance of a field-effect An FET has high input impedance; a bipolar transistor has low input impedance.
transistor compare with that of a bipolar transistor?
3-6A1 An AC ammeter indicates: . Effective (RMS) values of current.
, FCC Element 3 FINAL EXAM
3-6A2 By what factor must the voltage of an AC circuit, . 1.414
as indicated on the scale of an AC voltmeter, be
multiplied to obtain the peak voltage value?
3-6A3 What is the RMS voltage at a common 117-V AC.
household electrical power outlet?
3-6A4 What is the easiest voltage amplitude to measure . Peak-to-peak.
by viewing a pure sine wave signal on an oscilloscope?
3-6A5 By what factor must the voltage measured in an . 0.9
AC circuit, as indicated on the scale of an AC voltmeter,
be multiplied to obtain the average voltage value?
3-6A6 What is the peak voltage at a common . 165.5 volts.
household electrical outlet?
3-7A1 What is a sine wave? . A wave whose amplitude at any given instant can be represented by the
projection of a point on a wheel rotating at a uniform speed.
3-7A2 How many degrees are there in one complete . 360 degrees.
sine wave cycle?
3-7A3 What type of wave is made up of sine waves of . Square.
the fundamental frequency and all the odd harmonics?
3-7A4 What is the description of a square wave? . A wave that abruptly changes back and forth between two voltage levels and
stays at these levels for equal amounts of time.
3-7A5 What type of wave is made up of sine waves at Sawtooth wave.
the fundamental frequency and all the harmonics?
3-7A6 What type of wave is characterized by a rise time Sawtooth wave.
significantly faster than the fall time (or vice versa)?
3-8A1 What is the term used to identify an AC voltage Root mean square (RMS).
that would cause the same heating in a resistor as a
corresponding value of DC voltage?
3-8A2 What happens to reactive power in a circuit that It alternates between magnetic and electric fields and is not dissipated.
has both inductors and capacitors?
3-8A3 Halving the cross-sectional area of a conductor . Double the resistance.
will:
, FCC Element 3 FINAL EXAM
3-8A4 Which of the following groups is correct for . Silver, copper, aluminum, iron, and lead.
listing common materials in order of descending
conductivity?
3-8A5 How do you compute true power (power . Multiply apparent power times the power factor.
dissipated in the circuit) in a circuit where AC voltage
and current are out of phase?
3-8A6 Assuming a power source to have a fixed value . The load impedance equals the internal impedance of the source.
of internal resistance, maximum power will be
transferred to the load when:
3-9B1 What value of series resistor would be needed to . 4 megohms.
obtain a full scale deflection on a 50 microamp DC
meter with an applied voltage of 200 volts DC?
3-9B2 Which of the following Ohms Law formulas is I = R/E
incorrect?
3-9B3 If a current of 2 amperes flows through a 50-ohm 100 volts.
resistor, what is the voltage across the resistor?
3-9B4 If a 100-ohm resistor is connected across 200 . 2 amperes.
volts, what is the current through the resistor?
3-9B5 If a current of 3 amperes flows through a resistor . 30 ohms.
connected to 90 volts, what is the resistance?
3-9B6 A relay coil has 500 ohms resistance, and 380 ohms.
operates on 125 mA. What value of resistance should be
connected in series with it to operate from 110 V DC?
3-10B1 What is the peak-to-peak RF voltage on the 50 200 volts.
ohm output of a 100 watt transmitter?
3-10B2 What is the maximum DC or RMS voltage that . 200 volts.
may be connected across a 20 watt, 2000 ohm resistor?
3-10B3 A 500-ohm, 2-watt resistor and a 1500-ohm, 1- 31.6 volts.
watt resistor are connected in parallel. What is the
maximum voltage that can be applied across the
parallel circuit without exceeding wattage ratings?
3-10B4 In Figure 3B1, what is the voltage drop across 5 volts.
R1?
3-10B5 In Figure 3B2, what is the voltage drop across 9 volts.
R1?
3-10B6 What is the maximum rated current-carrying 0.316 amps.
capacity of a resistor marked "2000 ohms, 200 watts"?
3-1A4 What device is used to store electrical energy in . Capacitor.
an electrostatic field?
3-1A5 What formula would determine the inductive XL = 2f L
reactance of a coil if frequency and coil inductance are
known?
3-1A6 What is the term for the out-of-phase power Reactive power.
associated with inductors and capacitors?
3-2A1 What determines the strength of the magnetic The amount of current.
field around a conductor?
3-2A2 What will produce a magnetic field? A current flowing through a conductor.
3-2A3 When induced currents produce expanding Lenz's law.
magnetic fields around conductors in a direction that
opposes the original magnetic field, this is known as:
3-2A4 The opposition to the creation of magnetic lines Reluctance.
of force in a magnetic circuit is known as:
3-2A5 What is meant by the term "back EMF"? A voltage that opposes the applied EMF.
3-2A6 Permeability is defined as: The ratio of magnetic flux density in a substance to the magnetizing force that
produces it.
3-3A1 What metal is usually employed as a sacrificial Zinc bar.
anode for corrosion control purposes?
3-3A2 What is the relative dielectric constant for air? 1
3-3A3 Which metal object may be least affected by Stainless steel propeller shaft.
galvanic corrosion when submerged in seawater?
3-3A4 Skin effect is the phenomenon where: RF current flows in a thin layer of the conductor, closer to the surface, as
frequency increases.
3-3A5 Corrosion resulting from electric current flow Galvanic corrosion.
between dissimilar metals is called:
3-3A6 Which of these will be most useful for insulation Mica.
at UHF frequencies?
, FCC Element 3 FINAL EXAM
3-4A1 What formula would calculate the total LT = L1 + L2
inductance of inductors in series?
3-4A2 Good conductors with minimum resistance have Many free electrons.
what type of electrons?
3-4A3 Which of the 4 groups of metals listed below are Gold, silver, and copper.
the best low-resistance conductors?
3-4A4 What is the purpose of a bypass capacitor? It removes alternating current by providing a low impedance path to ground.
3-4A5 How would you calculate the total capacitance CT = C1 + C2 + C3.
of three capacitors in parallel?
3-4A6 How might you reduce the inductance of an Reduce the number of turns.
antenna coil?
3-5A1 What are the two most commonly-used Maximum forward current and PIV (peak inverse voltage).
specifications for a junction diode?
3-5A2 What limits the maximum forward current in a The junction temperature.
junction diode?
3-5A3 MOSFETs are manufactured with THIS protective Zener diode.
device built into their gate to protect the device from
3-5A4 What are the two basic types of junction field- N-channel and P-channel.
effect transistors?
3-5A5 A common emitter amplifier has: . More voltage gain than a common collector.
3-5A6 How does the input impedance of a field-effect An FET has high input impedance; a bipolar transistor has low input impedance.
transistor compare with that of a bipolar transistor?
3-6A1 An AC ammeter indicates: . Effective (RMS) values of current.
, FCC Element 3 FINAL EXAM
3-6A2 By what factor must the voltage of an AC circuit, . 1.414
as indicated on the scale of an AC voltmeter, be
multiplied to obtain the peak voltage value?
3-6A3 What is the RMS voltage at a common 117-V AC.
household electrical power outlet?
3-6A4 What is the easiest voltage amplitude to measure . Peak-to-peak.
by viewing a pure sine wave signal on an oscilloscope?
3-6A5 By what factor must the voltage measured in an . 0.9
AC circuit, as indicated on the scale of an AC voltmeter,
be multiplied to obtain the average voltage value?
3-6A6 What is the peak voltage at a common . 165.5 volts.
household electrical outlet?
3-7A1 What is a sine wave? . A wave whose amplitude at any given instant can be represented by the
projection of a point on a wheel rotating at a uniform speed.
3-7A2 How many degrees are there in one complete . 360 degrees.
sine wave cycle?
3-7A3 What type of wave is made up of sine waves of . Square.
the fundamental frequency and all the odd harmonics?
3-7A4 What is the description of a square wave? . A wave that abruptly changes back and forth between two voltage levels and
stays at these levels for equal amounts of time.
3-7A5 What type of wave is made up of sine waves at Sawtooth wave.
the fundamental frequency and all the harmonics?
3-7A6 What type of wave is characterized by a rise time Sawtooth wave.
significantly faster than the fall time (or vice versa)?
3-8A1 What is the term used to identify an AC voltage Root mean square (RMS).
that would cause the same heating in a resistor as a
corresponding value of DC voltage?
3-8A2 What happens to reactive power in a circuit that It alternates between magnetic and electric fields and is not dissipated.
has both inductors and capacitors?
3-8A3 Halving the cross-sectional area of a conductor . Double the resistance.
will:
, FCC Element 3 FINAL EXAM
3-8A4 Which of the following groups is correct for . Silver, copper, aluminum, iron, and lead.
listing common materials in order of descending
conductivity?
3-8A5 How do you compute true power (power . Multiply apparent power times the power factor.
dissipated in the circuit) in a circuit where AC voltage
and current are out of phase?
3-8A6 Assuming a power source to have a fixed value . The load impedance equals the internal impedance of the source.
of internal resistance, maximum power will be
transferred to the load when:
3-9B1 What value of series resistor would be needed to . 4 megohms.
obtain a full scale deflection on a 50 microamp DC
meter with an applied voltage of 200 volts DC?
3-9B2 Which of the following Ohms Law formulas is I = R/E
incorrect?
3-9B3 If a current of 2 amperes flows through a 50-ohm 100 volts.
resistor, what is the voltage across the resistor?
3-9B4 If a 100-ohm resistor is connected across 200 . 2 amperes.
volts, what is the current through the resistor?
3-9B5 If a current of 3 amperes flows through a resistor . 30 ohms.
connected to 90 volts, what is the resistance?
3-9B6 A relay coil has 500 ohms resistance, and 380 ohms.
operates on 125 mA. What value of resistance should be
connected in series with it to operate from 110 V DC?
3-10B1 What is the peak-to-peak RF voltage on the 50 200 volts.
ohm output of a 100 watt transmitter?
3-10B2 What is the maximum DC or RMS voltage that . 200 volts.
may be connected across a 20 watt, 2000 ohm resistor?
3-10B3 A 500-ohm, 2-watt resistor and a 1500-ohm, 1- 31.6 volts.
watt resistor are connected in parallel. What is the
maximum voltage that can be applied across the
parallel circuit without exceeding wattage ratings?
3-10B4 In Figure 3B1, what is the voltage drop across 5 volts.
R1?
3-10B5 In Figure 3B2, what is the voltage drop across 9 volts.
R1?
3-10B6 What is the maximum rated current-carrying 0.316 amps.
capacity of a resistor marked "2000 ohms, 200 watts"?
