FCC Element 3 Exam Questions and Answers 100% Pass

FCC Element 3 Exam Questions and Answers 100% Pass The product of the readings of an AC voltmeter and AC ammeter is called: a) Apparent power. b) True power. c)Power factor. d) Current power. - a) Apparent power. What is the basic unit of electrical power? a) Ohm. b) Watt. c) Volt. d) Ampere. - b) Watt. What is the term used to express the amount of electrical energy stored in an electrostatic field? a) Joules. b) Coulombs. c) Watts. d) Volts. - a) Joules. Page 2/182 Crafted for Academic Insight by ©KatelynWhitman 2025. All rights reserved. What device is used to store electrical energy in an electrostatic field? a) Battery. b) Transformer. c) Capacitor. d) Inductor. - c) Capacitor. What formula would determine the inductive reactance of a coil if frequency and coil inductance are known? a) XL = fL b) XL = 2fL c) XL = 1 / 2fC d) XL = 1 / R2+X2 - b) XL = 2fL What is the term for the out-of-phase power associated with inductors and capacitors? a) Effective power. b) True power. c) Peak envelope power. d) Reactive power. - d) Reactive power. What determines the strength of the magnetic field around a conductor? a) The resistance divided by the current. b) The ratio of the current to the resistance. Page 3/182 Crafted for Academic Insight by ©KatelynWhitman 2025. All rights reserved. c) The diameter of the conductor. d) The amount of current. - d) The amount of current. What will produce a magnetic field? a) A DC source not connected to a circuit. b) The presence of a voltage across a capacitor. c) A current flowing through a conductor. d) The force that drives current through a resistor. - c) A current flowing through a conductor. When induced currents produce expanding magnetic fields around conductors in a direction that opposes the original magnetic field, this is known as: a) Lenz's law. b) Gilbert's law. c) Maxwell's law. d) Norton's law. - a) Lenz's law. The opposition to the creation of magnetic lines of force in a magnetic circuit is known as: a) Eddy currents. b) Hysteresis. c) Permeability. d) Reluctance. - d) Reluctance. What is meant by the term "back EMF"? Page 4/182 Crafted for Academic Insight by ©KatelynWhitman 2025. All rights reserved. a) A current equal to the applied EMF. b) An opposing EMF equal to R times C (RC) percent of the applied EMF. c) A voltage that opposes the applied EMF. d) A current that opposes the applied EMF. - c) A voltage that opposes the applied EMF. Permeability is defined as: a) The magnetic field created by a conductor wound on a laminated core and carrying current. b) The ratio of magnetic flux density in a substance to the magnetizing force that produces it. c) Polarized molecular alignment in a ferromagnetic material while under the influence of a magnetizing force. d) None of these. - b) The ratio of magnetic flux density in a substance to the magnetizing force that produces it. What metal is usually employed as a sacrificial anode for corrosion control purposes? a) Platinum bushing. b) Lead bar. c) Zinc bar. d) Brassrod. - c) Zinc bar. What is the relative dielectric constant for air? a) 1 b) 2 Page 5/182 Crafted for Academic Insight by ©KatelynWhitman 2025. All rights reserved. c) 4 d) 0 - a) 1 Which metal object may be least affected by galvanic corrosion when submerged in seawater? a) Aluminum outdrive. b) Bronze through-hull. c) Exposed lead keel. d) Stainless steel propeller shaft. - d) Stainless steel propeller shaft. Skin effect is the phenomenon where: a) RF current flows in a thin layer of the conductor, closer to the surface, as frequency increases. b) RF current flows in a thin layer of the conductor, closer to the surface, as frequency decreases. c) Thermal effects on the surface of the conductor increase the impedance. d) Thermal effects on the surface of the conductor decrease the impedance. - a) RF current flows in a thin layer of the conductor, closer to the surface, as frequency increases. Corrosion resulting from electric current flow between dissimilar metals is called: a) Electrolysis. b) Stray current corrosion. c) Oxygen starvation corrosion. d) Galvanic corrosion. - d) Galvanic corrosion. Which of these will be most useful for insulation at UHF frequencies? Page 6/182 Crafted for Academic Insight by ©KatelynWhitman 2025. All rights reserved. a) Rubber. b) Mica. c) Wax impregnated paper. d) Lead. - b) Mica. What formula would calculate the total inductance of inductors in series? a) LT = L1 / L2 b) LT = L1 + L2 c) LT = 1 / L1 + L2 d) LT = 1 / L1 x L2 - b) LT = L1 + L2 Good conductors with minimum resistance have what type of e