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Electricity > Basic Electricity Final 102 Questions > Flashcards

Basic Electricity Final 102 Questions Flashcards

1
Q
  1. The working voltage of a capacitor in an AC circuit should be…..

A—equal to the highest applied voltage.
B—at least 20 percent greater than the highest applied
voltage.
C—at least 50 percent greater than the highest applied
voltage.

A

C—at least 50 percent greater than the highest applied
voltage.

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2
Q
  1. The term that describes the combined resistive forces in an AC circuit is
    A— resistance.
    B—reactance.
    C—impedance.
A

C—impedance.

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3
Q

8002-1. What is the opposition to the flow of AC produced by an electromagnetic field (EMF) with generated back voltage called?

A— Inductive reactance.
B—Capacitive reactance.
C—Mutual inductance.

A

A— Inductive reactance.

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4
Q

8002-2. Electrostatic fields are also known as

A— dielectric fields.
B— electrostatic fields.
C—static fields.

A

A— dielectric fields.

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5
Q
  1. The basis for transformer operation in the use of alternating current is mutual

A— inductance.
B—capacitance.
C—reactance.

A

A— inductance.

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6
Q
  1. The opposition offered by a coil to the flow of alternating current (ignoring resistance) is called
    A— impedance.
    B— reluctance.
    C— inductive reactance.
A

C— inductive reactance.

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7
Q
  1. An increase in which of the following factors will cause an increase in the inductive reactance of a circuit?
    A— Inductance and frequency.
    B—Resistance and voltage.
    C—Resistance and capacitive reactance.
A

A— Inductance and frequency.

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8
Q
  1. (Refer to Figure 1.) When different rated capacitors are connected in series in a circuit, the total capacitance is
    A— less than the capacitance of the lowest rated capacitor.
    B—greater than the capacitance of the highest rated
    capacitor.
    C— equal to the sum of all the capacitances.
A

A— less than the capacitance of the lowest rated capacitor.

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9
Q

8006-1. Capacitors are sometimes used in DC circuits to
A— counteract inductive reactance at specific locations.
B—smooth out slight pulsations in current/voltage.
C—assist in stepping voltage and current up and/or down.

A

B—smooth out slight pulsations in current/voltage.

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10
Q
  1. In an AC circuit, the effective voltage is
    A— equal to the maximum instantaneous voltage.
    B—greater than the maximum instantaneous voltage.
    C—less than the maximum instantaneous voltage.
A

C—less than the maximum instantaneous voltage.

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11
Q
  1. The amount of electricity a capacitor can store is directly proportional to the
    A— distance between the plates and inversely proportional to the plate area.
    B—plate area and is not affected by the distance
    between the plates.
    C—plate area and inversely proportional to the distance between the plates.
A

C—plate area and inversely proportional to the distance between the plates.

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12
Q
  1. (Refer to Figure 2.) What is the total capacitance of a certain circuit containing three capacitors with capacitances of .02 microfarad, .05 microfarad, and .10 micro-farad, respectively?
    A—.170 uF.
    B—0.125 pF.
    C—.0125 uF.
A

A—.170 uF.

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13
Q

8009-1. What is the total capacitance of a circuit containing three capacitors in parallel with capacitances of.02 microfarad, .05 microfarad, and .10 microfarad, respectively?
A—.170 uF.
B—0.125 uF.
C—.0125 uF.

A

A—.170 pF.

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14
Q

8009-2. Convert farads to microfarads by A— multiplying farads by 10 to the power of 6
B—multiplying picofarads by 10 to the power of 6
C— multiplying microfarads by 10 to the power of 6

A

A— multiplying farads by 10 to the power of 6

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15
Q

8009-3. Convert farads to picofarads by:
A— multiplying farads by 10 to the power of 12
B— multiplying microfarads by 10 to the power of 12
C— multiplying picofarads by 10 to the power of 12

A

A— multiplying farads by 10 to the power of 12

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16
Q
  1. Unless otherwise specified, any values given for current or voltage in an AC circuit are assumed to be
    A— instantaneous values.
    B— effective values.
    C— maximum values.
A

B-effective values.

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17
Q
  1. When different rated capacitors are connected in parallel in a circuit, the total capacitance is
    (Note: C = C1 + C2 + C3 …)
    A—less than the capacitance of the lowest rated
    capacitor.
    B—equal to the capacitance of the highest rated
    capacitor.
    C— equal to the sum of all the capacitances.
A

C— equal to the sum of all the capacitances.

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18
Q
  1. When inductors are connected in series in a circuit, the total inductance (where the magnetic fields of each inductor do not affect the others) is
    (Note: LT = Ly + L2 + La.. .)
    A— less than the inductance of the lowest rated inductor.
    B— equal to the inductance of the highest rated inductor.
    C— equal to the sum of the individual inductances.
A

C— equal to the sum of the individual inductances.

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19
Q
  1. (Refer to Figure 3.) When more than two inductors of different inductances are connected in parallel in a circuit, the total inductance is
    A— less than the inductance of the lowest rated inductor.
    B— equal to the inductance of the highest rated inductor.
    C— equal to the sum of the individual inductances.
A

A— less than the inductance of the lowest rated inductor.

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20
Q
  1. What is the total capacitance of a certain circuit containing three capacitors with capacitances of .25 micro-farad, 03 microfarad, and .12 microfarad, respectively?
    (Note: CT = C1 + C2 + C3)
    A— .4 uF.
    B— .04 uF.
    C— .04 uF.
A

A— .4 uF.

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21
Q
  1. Which requires the most electrical power during operation?
    (Note: 1 horsepower = 746 watts)
    A— A 12-volt motor requiring 8 amperes.
    B— Four 30-watt lamps in a 12-volt parallel circuit.
    C— Two lights requiring 3 amperes each in a 24-volt
    parallel system.
A

C— Two lights requiring 3 amperes each in a 24-volt
parallel system.

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22
Q
  1. How much power must a 24-volt generator furnish to a system which contains the following loads?
    Unit——————————————Rating
    One motor (75 % efficient)——1/5 hp
    Three position lights———20 watts each
    One heating element..———5 amp
    One anticollision light———3 amp
    (Note: 1 horsepower = 746 watts)
    A— 402 watts.
    B— 385 watts.
    C— 450 watts.
A

C— 450 watts

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23
Q
  1. A 12-volt electric motor has 1,000 watts input and 1 horsepower output. Maintaining the same efficiency, how much input power will a 24-volt, 1-horsepower electric motor require?
    (Note: 1 horsepower = 746 watts)
    A— 1,000 watts.
    B— 2,000 watts.
    C— 500 watts.
A

A— 1,000 watts.

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24
Q
  1. 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?
    A—1.11 amperes.
    B—1 ampere.
    C—25.23 amperes.
A

C—25.23 amperes

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25
Q
  1. 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?
    A—1.11 amperes.
    B—1 ampere.
    C—25.23 amperes.
A

C—25.23 amperes

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26
Q
  1. A 24-volt, 1-horsepower DC electric motor that is 80 percent efficient requires 932.5 watts. How much power will a 12-volt, 1-horsepower DC electric motor that is 75 percent efficient require?
    (Note: 1 horsepower = 746 watts)
    A— 932.5 watts.
    B— 1,305.5 watts.
    C— 994.6 watts.
A

C— 994.6 watts.

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27
Q
  1. The potential difference between two conductors which are insulated from each other is measured in
    A— volts.
    B— amperes.
    C— coulombs.
A

A— volts.

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28
Q

8020-1. Which effect does not apply to the movement of electrons flowing in a conductor?
A— Magnetic energy.
B— Thermal energy.
C— Static energy.

A

C— Static energy.

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29
Q
  1. When calculating power in a reactive or inductive
    AC circuit, the true power is
    A—more than the apparent power.
    B—less than the apparent power in a reactive circuit and more than the apparent power in an inductive circuit.
    C— less than the apparent power.
A

C— less than the apparent.

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30
Q
  1. (Refer to Figure 4.) How much power is being furnished to the circuit?
    A—575 watts.
    B—2,875 watts.
    C— 2,645 watts.
A

C— 2,645 watts.

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31
Q
  1. (Refer to Figure 5. What is the impedance of an AC-series circuit consisting of an inductor with a reactance of 10 ohms, a capacitor with a reactance of 4 ohms, and a resistor with a resistance of 8 ohms?
    A— 22 ohms.
    B— 5.29 ohms.
    C—10 ohms.
A

C—10 ohms.

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32
Q
  1. (Refer to Figure 6.) If resistor R5 is disconnected at the junction of R4 and Rg as shown, what will the ohmmeter read?
    A—2.76 ohms.
    B— 3 ohms.
    C—12 ohms.
A

B— 3 ohms.

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33
Q
  1. (Refer to Figure 7.) If resistor Rg is disconnected at terminal D, what will the ohmmeter read?
    A— Infinite resistance.
    B— 10 ohms.
    C— 20 ohms.
A

A— Infinite resistance.

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34
Q
  1. (Refer to Figure 8.) With an ohmmeter connected into the circuit as shown, what will the ohmmeter read?
    A— 20 ohms.
    B— Infinite resistance.
    C— 10 ohms.
A

C— 10 ohms.

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35
Q
  1. (Refer to Figure 9.) How many instruments (volt-meters and ammeters) are installed correctly?
    A— Three.
    B— One.
    C— Two.
A

C— Two.

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36
Q
  1. The correct way to connect a test voltmeter in a circuit is
    A—in series with a unit.
    B— between the source voltage and the load.
    C— in parallel with a unit.
A

C— in parallel with a unit.

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37
Q

8029-1. What will a voltmeter read if properly connected across a closed switch in a circuit with electrical power on?
A— Voltage drop in the components) the switch is
connected to.
B— System voltage.
C— Zero voltage.

A

C— Zero voltage.

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38
Q

8029-2. What does the letter Q symbolize when measuring electrical charge?
A— Farad.
B— Electron.
C— Coulomb.

A

C— Coulomb.

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39
Q
  1. Which term means.001 ampere?
    A— Microampere.
    B— Kiloampere.
    C— Milliampere.
A

C— Milliampere.

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40
Q
  1. A cabin entry light of 10 watts and a dome light of
    20 watts are connected in parallel to a 30-volt source. If the voltage across the 10-watt light is measured, it will be
    A— equal to the voltage across the 20-watt light.
    B— half the voltage across the 20-watt light.
    C— one-third of the input voltage.
A

A— equal to the voltage across the 20-watt light.

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41
Q
  1. A 14-ohm resistor is to be installed in a series circuit carrying .05 ampere. How much power will the resistor be required to dissipate?
    A— At least .70 milliwatt.
    B— At least 35 milliwatts.
    C— Less than .035 watt.
A

B— At least 35 milliwatts.

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42
Q
  1. .002 kV equals
    A—20 volts.
    B— 2.0 volts.
    C— 2 volt.
A

B— 2.0 volts.

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43
Q
  1. (Refer to Figure 10.) What is the measured voltage of the series-parallel circuit between terminals A and B?
    A— 1.5 volts.
    B— 3.0 volts.
    C— 4.5 volts.
A

B— 3.0 volts.

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44
Q
  1. (Refer to Figure 64.) A 24-volt source is required to furnish 48 watts to a parallel circuit consisting of two resistors of equal value. What is the value of each resistor?
    A— 24 ohms.
    B— 12 ohms.
    C— 6 ohms.
A

A— 24 ohms.

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45
Q
  1. Which requires the most electrical power?
    (Note: 1 horsepower = 746 watts)
    A— A 1/5-horsepower, 24-volt motor which is 75
    percent efficient.
    B— Four 30-watt lamps arranged in a 12-volt parallel
    circuit.
    C— A 24-volt anticollision light circuit consisting of two light assemblies which require 3 amperes each during operation.
    .
A

A— A 1/5-horsepower, 24-volt motor which is 75.

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46
Q
  1. What unit is used to express electrical power?
    A—Volt.
    B— Watt.
    C— Ampere.
A

B— Watt.

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47
Q

8037-1. What is the basic unit of electrical quantity?
A— Electromotive force.
B— Ampere.
C— Coulomb.

A

C— Coulomb.

48
Q
  1. What is the operating resistance of a 30-watt light bulb designed for a 28-volt system?
    A— 1.07 ohms.
    B— 26 ohms.
    C— 0.93 ohm.
A

B— 26 ohms.

49
Q
  1. When referencing resistance in a parallel DC cir cuit, which of the following statements is true?
    A— The current is equal in all portions of the circuit.
    B— The total current is equal to the sum of the currents through the individual branches of the circuit.
    C— The current in amperes can be found by dividing the source voltage in volts by the sum of the resistors in ohms.
A

B— The total current is equal to the sum of the currents through the individual branches of the circuit.

50
Q

8039-1. Which of the following is commonly used as a rectifier in electrical circuits?
A— Diodes and anodes.
B— Diodes and cathodes.
C— Diodes.

A

C— Diodes.

51
Q
  1. Diodes are used in electrical power supply circuits primarily as
    A— switches.
    B— rectifiers.
    C— relays.
A

B— rectifiers.

52
Q
  1. Transfer of electric energy from one circuit to another without the aid of electrical connections
    A— is called induction.
    B—is called capacitance.
    C— can cause excessive arcing and heat, and as a result. is practical for use only with low voltages/amperages.
A

C— can cause excessive arcing and heat, and as a result. is practical for use only with low voltages/amperages.

53
Q
  1. If three resistors of 3 ohms, 5 ohms, and 22 ohms are connected in series in a 28-volt circuit, how much current will flow through the 3-ohm resistor?
    A— 9.3 amperes.
    B— 1.05 amperes.
    C— 0.93 ampere.
A

C— 0.93 ampere.

54
Q
  1. A circuit has an applied voltage of 30 volts and a load consisting of a 10-ohm resistor in series with a
    20-ohm resistor. What is the voltage drop across the
    10-ohm resistor?
    A— 10 volts:
    B— 20 volts.
    C— 30 volts.
A

A— 10 volts.

55
Q
  1. (Refer to Figure 11.) Find the total current flowing in the wire between points C and D.
    A— 6.0 amperes.
    B— 2.4 amperes.
    C— 3.0 amperes.
A

C— 3.0 amperes.

56
Q
  1. (Refer to Figure 11.) Find the voltage across the
    8-ohm resistor.
    A— 8 volts.
    B— 20.4 volts.
    C— 24 volts.
A

C— 24 volts.

57
Q
  1. (Refer to Figure 12.) Find the total resistance of the circuit.
    A— 16 ohms.
    B— 2.6 ohms.
    C— 21.2 ohms.
A

C— 21.2 ohms.

58
Q
  1. Which is correct in reference to electrical resis-tance?
    A— Two electrical devices will have the same combined resistance if they are connected in series as they will have if connected in parallel.
    B— If one of three bulbs in a parallel lighting circuit is removed, the total resistance of the circuit will become greater.
    C— An electrical device that has a high resistance will use more power than one with a low resistance with the same applied voltage.
A

B— If one of three bulbs in a parallel lighting circuit is removed, the total resistance of the circuit will become greater.

59
Q
  1. What happens to the current in a voltage step-up transformer with a ratio of 1 to 4?
    A— The current is stepped down by a 1 to 4 ratio.
    B— The current is stepped up by a 1 to 4 ratio.
    C— The current does not change.
A

B— The current is stepped up by a 1 to 4 ratio.

60
Q
  1. (Refer to Figure 13.) Determine the total current flow in the circuit.
    A— 0.2 ampere.
    B— 1.4 amperes.
    C— 0.8 ampere.
A

B— 1.4 amperes.

61
Q

8049-1. In a parallel circuit with three 6-ohm resistors across a 12-volt battery, what is the total current (It) value in the circuit?
A— 2 amps.
B— 6 amps.
C— 12 amps.

A

B— 6 amps.

62
Q
  1. (Refer to Figure 14.) The total resistance of the circuit is
    A—25 ohms.
    B—35 ohms.
    C—17 ohms.
A

C—17 ohms.

63
Q
  1. Which of these will cause the resistance of a conductor to decrease?
    A— Decrease the length or the cross-sectional area.
    B— Decrease the length or increase the cross-sectional
    area.
    C— Increase the length or decrease the cross-sectional
    area.
A

B— Decrease the length or increase the cross-sectional.

64
Q
  1. Through which material will magnetic lines of force pass the most readily?
    A— Copper.
    B— Iron.
    C— Aluminum.
A

B— Iron.

65
Q
  1. (Refer to Figure 64.) A 48-volt source is required to furnish 192 watts to a parallel circuit consisting of three resistors of equal value. What is the value of each resistor?
    A— 36 ohms.
    B— 4 ohms.
    C—12 ohms.
A

B— 4 ohms.

66
Q
  1. Which is correct concerning a parallel circuit?
    A— Total resistance will be smaller than the smallest
    resistor.
    B— Total resistance will decrease when one of the
    resistances is removed.
    C— Total voltage drop is the same as the total
    resistance.
A

A— Total resistance will be smaller than the smallest.

67
Q
  1. The voltage drop in a circuit of known resistance is dependent on
    A— the voltage of the circuit.
    B— only the resistance of the conductor and does not change with a change in either voltage or amperage.
    C— the amperage of the circuit.
A

C— the amperage of the circuit.

68
Q
  1. A thermal switch, or thermal protector, as used in, an electric motor, is designed to
    A— close the integral fan circuit to allow cooling of the
    motor.
    B— open the circuit in order to allow cooling of the motor.
    C— reroute the circuit to ground.
A

B— open the circuit in order to allow cooling of the motor.

69
Q
  1. (Refer to Figure 15.) With the landing gear retracted, the red indicator light will not come on if an open occurs in wire
    A— 19.
    В— 7.
    C— 17.
A

A— 19.

70
Q
  1. (Refer to Figure 15.) Wire 7 is used to
    A— close the PUSH-TO-TEST circuit.
    B— open the UP indicator light circuit when the landing
    gear is retracted.
    C— close the UP indicator light circuit when the landing
    gear is retracted.
A

A— close the PUSH-TO-TEST circuit.

71
Q
  1. (Refer to Figure 15.) When the landing gear is down, the green light will not come on if an open occurs in wire
    A— 7.
    B— 6.
    C— 17.
A

B— 6.

72
Q
  1. (Refer to Figure 16. What will be the effect if the
    PCO relay fails to operate when the left-hand tank is selected?
    A— The fuel pressure crossfeed valve will not open.
    B— The fuel tank crossfeed valve open light will illuminate.
    C— The fuel pressure crossfeed valve open light will
    not illuminate.
A

C— The fuel pressure crossfeed valve open light will
not illuminate.

73
Q
  1. (Refer to Figure 16.) The TCO relay will operate if
    24-volts DC is applied to the bus and the fuel tank selector is in the
    A— right-hand tank position.
    B— crossfeed position.
    C— left-hand tank position.
A

B— crossfeed position.

74
Q
  1. (Refer to Figure 16.) With power to the bus and the fuel selector switched to the right-hand tank, how many relays in the system are operating?
    A— Three.
    B— Two.
    C— Four.
A

A— Three.

75
Q
  1. (Refer to Figure 16.) When electrical power is applied to the bus, which relays are energized?
    A— PCC and TCC.
    B— TCC and TCO.
    C— PCO and PCC.
A

A— PCC and TCC.

76
Q
  1. (Refer to Figure 16. Energize the circuit with the fuel tank selector switch selected to the left-hand posi-tion. Using the schematic, identify the switches that will change position.
    A— 5, 9, 10, 11, 12, 13, and 15.
    B— 3, 5, 6, 7, 11, and 13.
    C— 5, 6, 11, 12, 13, 15, and 16.
A

C— 5, 6, 11, 12, 13, 15, and 16.

77
Q
  1. (Refer to Figure 17.) Which of the components is a potentiometer?
    A— 5.
    B— 3.
    C— 11.
A

B— 3.

78
Q
  1. (Refer to Figure 17.) The electrical symbol represented at number 5 is a variable
    A— inductor.
    B— resistor.
    C— capacitor..
A

C— capacitor.

79
Q
  1. (Refer to Figure 18.) When the landing gear is up and the throttles are retarded, the warning horn will not sound if an open occurs in wire
    A— 4.
    B— 2.
    C— 9.
A

A— 4.

80
Q
  1. (Refer to Figure 18.) The control valve switch must be placed in the neutral position when the landing gear is down to
    A— permit the test circuit to operate.
    B— prevent the warning horn from sounding when the throttles are closed.
    C— remove the ground from the green light.
A

B— prevent the warning horn from sounding when the throttles are closed.

81
Q
  1. (Refer to Figure 19.) Under which condition will a ground be provided for the warning horn through both gear switches when the throttles are closed?
    A— Right gear up and left gear down.
    B— Both gears up and the control valve out of neutral.
    C— Left gear up and right gear down.
A

C— Left gear up and right gear down.

82
Q
  1. (Refer to Figure 19.) When the throttles are retarded with only the right gear down, the warning horn will not sound if an open occurs in wire
    A— 5.
    B一 13.
    C— 6.
A

A— 5.

83
Q
  1. (Refer to Figure 19.) When the landing gears are up and the throttles are retarded, the warning horn will not sound if an open occurs in wire
    A— 5.
    B—7.
    C— 6.
A

C— 6.

84
Q
  1. When referring to an electrical circuit diagram, what point is considered to be at zero voltage?
    A— The circuit breaker.
    B— The switch.
    C— The ground reference.
A

C— The ground reference.

85
Q

8072-1. What is the purpose of the ground symbol used in electrical circuit diagrams?
A— To show that there is common bus for connection of the source of electrical energy to the load.
B— To show the source of electrical energy for the load.
C— To show that there is a return path for the current between the source of electrical energy and the load.

A

C—To show that there is a return path for the current between the source of electrical energy and the load.

86
Q
  1. (Refer to Figure 20.) Troubleshooting an open circuit with a voltmeter as shown in this circuit will
    A— permit current to flow and illuminate the lamp.
    B— create a low resistance path and the current flow
    will be greater than normal.
    C— permit the battery voltage to appear on the voltmeter.
A

C— permit the battery voltage to appear on the voltmeter.

87
Q
  1. (Refer to Figure 21.) Which symbol represents a variable resistor?
    A— 2.
    В— 1.
    C— 3.
A

A— 2.

88
Q
  1. In a P-N-P transistor application, the solid-state device is turned on when the
    A— base is negative with respect to the emitter.
    B— base is positive with respect to the emitter.
    C— emitter is negative with respect to the base.
A

A— base is negative with respect to the emitter.

89
Q
  1. In an N-P-N transistor application, the solid-state device is turned on when the
    A— emitter is positive with respect to the base.
    B— base is negative with respect to the emitter.
    C— base is positive with respect to the emitter.
A

C— base is positive with respect to the emitter.

90
Q
  1. Typical application for zener diodes is as
    A— full-wave rectifiers.
    B— half-wave rectifiers.
    C— voltage regulators.
A

C— voltage regulators.

91
Q
  1. (Refer to Figure 22.) Which illustration is correct concerning bias application and current (positive charge) flow?
    A— 1.
    B— 2.
    C— 3.
A

A— 1.

92
Q
  1. Forward biasing of a solid-state device will cause the device to
    A— conduct via zener breakdown.
    B— conduct.
    C— turn off.
A

B— conduct.

93
Q
  1. (Refer to Figure 23.) If an open occurs at R1, the light
    A— cannot be turned on.
    B— will not be affected.
    C— cannot be turned off.
A

C— cannot be turned off.

94
Q
  1. (Refer to Figure 23.) If R2 sticks in the up position, the light will
    A— be on full bright.
    B— be very dim.
    C— not illuminate.
A

A— be on full bright.

95
Q
  1. (Refer to Figure 24.) Which statement concerning the depicted logic gate is true?
    A— Any input being 1 will produce a 0 output.
    B— Any input being 1 will produce a 1 output.
    C— All inputs must be 1 to produce a 1 output.
A

B— Any input being 1 will produce a 1 output.

96
Q
  1. (Refer to Figure 25.) In a functional and operating circuit, the depicted logic gate’s output will be 0
    A— only when all inputs are 0.
    B— when all inputs are 1.
    C— when one or more inputs are 0.
A

C— when one or more inputs are 0.

97
Q
  1. (Refer to Figure 26.) Which of the logic gate output conditions is correct with respect to the given inputs?
    A— 1.
    B— 2
    C— 3.
A

B— 2.

98
Q

8084-1. Which of the following logic gates will provide an active high out only when all inputs are different?
A— XNOR.
B— NAND.
C— XOR.

A

C— XOR.

99
Q
  1. A lead-acid battery with 12 cells connected in
    series (no-load voltage = 2.1 volts per cell) furnishes 10
    amperes to a load of 2-ohms resistance. The internal resistance of the battery in this instance is
    A— 0.52 ohm.
    B— 2.52 ohms.
    C— 5.0 ohms.
A

A— 0.52 ohm.

100
Q
  1. If electrolyte from a lead-acid battery is spilled in the battery compartment, which procedure should be followed?
    A— Apply boric acid solution to the affected area
    followed by a water rinse.
    B— Rinse the affected area thoroughly with clean
    water.
    C— Apply sodium bicarbonate solution to the affected
    area followed by a water rinse.
A

C— Apply sodium bicarbonate solution to the affected
area followed by a water rinse.

101
Q
  1. Which statement regarding the hydrometer reading of a lead-acid storage battery electrolyte is true?
    A— The hydrometer reading does not require a temperature correction if the electrolyte temperature is 80°F.
    B— A specific gravity correction should be added to the hydrometer reading if the electrolyte temperature is below 59°F.
    C— The hydrometer reading will give a true indication of the capacity of the battery regardless of the electrolyte temperature.
A

A— The hydrometer reading does not require a temperature correction if the electrolyte temperature is 80°F.

102
Q
  1. A fully charged lead-acid battery will not freeze until extremely low temperatures are reached because
    A— the acid is in the plates, thereby increasing the
    specific gravity of the solution.
    B— most of the acid is in the solution.
    C— increased internal resistance generates sufficient
    heat to prevent freezing.
A

B— most of the acid is in the solution.

103
Q
  1. What determines the amount of current which will flow through a battery while it is being charged by a constant voltage source?
    A— The total plate area of the battery.
    B— The state-of-charge of the battery.
    C— The ampere-hour capacity of the battery.
A

B— The state-of-charge of the battery.

104
Q
  1. Which of the following statements is/are generally true regarding the charging of several aircraft batteries together?
  2. Batteries of different voltages (but similar capacities)* can be connected in series with each other across the charger, and charged using the constant current method.
  3. Batteries of different ampere-hour capacity and same voltage can be connected in parallel with each other across the charger, and charged using the constant voltage method.
  4. Batteries of the same voltage and same ampere-hour capacity must be connected in series with each other across the charger, and charged using the constant current method.
    А— 3.
    B— 2 and 3.
    C— 1 and 2.
A

C— 1 and 2.

105
Q
  1. The method used to rapidly charge a nickel-cadmium battery utilizes
    A— constant current and constant voltage.
    B— constant current and varying voltage.
    C— constant voltage and varying current.
A

C— constant voltage and varying current.

106
Q
  1. Which condition is an indication of improperly torqued cell link connections of a nickel-cadmium battery?
    A— Light spewing at the cell caps.
    B— Toxic and corrosive deposits of potassium
    carbonate crystals.
    C— Heat or burn marks on the hardware.
A

C— Heat or burn marks on the hardware.

107
Q
  1. The presence of any small amount of potassium carbonate deposits on the top of nickel-cadmium battery cells in service is an indication of
    A— normal operation.
    B— excessive gassing.
    C— plate sulfation.
A

A— normal operation.

108
Q
  1. What is the likely result, if any, of servicing and charging nickel-cadmium and lead-acid batteries together in the same service area?
    A— The electrolytes in each battery are the same, so
    there are no significant differences.
    B— The nickel-cadmium would not be affected, but the lead-acid battery could become contaminated.
    C— Contamination of both types of batteries would occur.
A

C— Contamination of both types of batteries would occur.

109
Q

8095-1. Which of the following best describes the operating principal in a nickel-cadmium battery installed in an aircraft?
A— At full charge, the electrolyte will be at its lowest
level and should be filled.
B— To completely charge a nickel-cadmium battery, some gassing must take place; thus, some water will be used.
C— When positive plates slowly give up oxygen, which is regained by the negative plates, the battery is charging.

A

B— To completely charge a nickel-cadmium battery, some gassing must take place; thus, some water will be used.

110
Q
  1. The electrolyte of a nickel-cadmium battery is the lowest when the battery is
    A— being charged.
    B— in a discharged condition.
    C— under a heavy load condition.
A

B— in a discharged condition.

111
Q

8096-1. The electrolyte of a nickel cadmium battery is highest when the battery is
A— in a fully charged condition.
B— in a discharged condition.
C— under a no-load condition.

A
112
Q
  1. The end-of-charge voltage of a 19-cell nickel-cad-mium battery, measured while still on charge,
    A— must be 1.2 to 1.3 volts per cell.
    B— must be 1.4 volts per cell.
    C— depends upon its temperature and the method
    used for charging.
A

C— depends upon its temperature and the method.

113
Q
  1. During discharge, nickel-cadmium batteries will show a lower liquid level than when at full charge because
    A— a chemical action causes the electrolyte to
    evaporate through the vents.
    B— current leakage from individual cells causes a rise
    in temperature.
    C— the electrolyte becomes absorbed into the plates.
A

C— the electrolyte becomes absorbed into the plates.

114
Q
  1. How can the state-of-charge of a nickel-cadmium battery be determined?
    A— By measuring the specific gravity of the electrolyte.
    B— By a measured discharge.
    C— By the level of the electrolyte.
A

B— By a measured discharge.

115
Q
  1. What may result if water is added to a nickel-cad-mium battery when it is not fully charged?
    A— Excessive electrolyte dilution.
    B— Excessive spewing is likely to occur during the charging cycle.
    C— No adverse effects since water may be added
    anytime.
A

B— Excessive spewing is likely to occur during the charging cycle.

116
Q
  1. The purpose of providing a space underneath the plates in a lead acid batter’s cell container is to
    A— prevent sediment buildup from contacting the plates
    and causing a short circuit.
    B— allow for convection of the electrolyte in order to
    provide for cooling of the plates.
    C— ensure that the electrolyte quantity ratio to the number of plates and plate area is adequate.
A

A— prevent sediment buildup from contacting the plates
and causing a short circuit.

117
Q

8004-1. What factors strengthen a coil inductor?
A— Limiting and separating the coils.
B— Adding and separating the coils.
C— Adding coils close together.

A

C— Adding coils close together.

Electricity (3 decks)

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