FAA Exams > General

1	In an ac circuit, the effective voltage is equal to the maximum instantaneous voltage. greater than the maximum instantaneous voltage. less than the maximum instantaneous voltage.
2	The basis for transformer operation in the use of alternating current is mutual reactance. capacitance. inductance.
3	(Refer to General figure 2.) What is the total capacitance of a circuit containing three capacitors in parallel with capacitances of .02 microfarad, .05 microfarad, and .10 microfarad, respectively? 0.125 pF. .170 ? F. .0125 ? F.
4	When inductors are connected in series in a circuit, the total inductance is (where the magnetic fields of each inductor do not affect the others) (Note: LT = L1 + L2 + L3 . . .) equal to the inductance of the highest rated inductor. equal to the sum of the individual inductances. less than the inductance of the lowest rated inductor.
5	The amount of electricity a capacitor can store is directly proportional to the distance between the plates and inversely proportional to the plate area. plate area and is not affected by the distance between the plates. plate area and inversely proportional to the distance between the plates.
6	The opposition offered by a coil to the flow of alternating current is called (disregard resistance) inductive reactance. impedance. reluctance.
7	How many amperes will a 28-volt generator be required to supply to a circuit containing five lamps in parallel, three of which have a resistance of 6 ohms each and two of which have a resistance of 5 ohms each? 1 ampere. 1.11 amperes. 25.23 amperes.
8	The potential difference between two conductors which are insulated from each other is measured in volts. coulombs. amperes.
9	Which requires the most electrical power during operation? (Note: 1 horsepower = 746 watts) Four 30-watt lamps in a 12-volt parallel circuit. A 12-volt motor requiring 8 amperes. Two lights requiring 3 amperes each in a 24-volt parallel system.
10	A 24-volt source is required to furnish 48 watts to a parallel circuit consisting of four resistors of equal value. What is the voltage drop across each resistor? 12 volts. 24 volts. 6 volts.