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CDC 3E052C Volume 3. Electrical Systems > CDC 3E052C Volume 3. Electrical Systems > Flashcards

CDC 3E052C Volume 3. Electrical Systems Flashcards

1
Q
  1. (401) What should you use to move the victim or conductor away from a person connected to a live circuit if the power cannot be turned off?

A. Wet rope.
B. Bare hands.
C. Insulated object.
D. Galvanized conduit.

A

C. Insulated object.

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2
Q
  1. (402) If you cannot control a victim’s bleeding by direct pressure alone, you

A. apply a tourniquet.
B. put cold compresses over the wound.
C. use your belt to support the limb as you pinch the blood vessel.
D. apply pressure to the pressure points on the inside of the upper arm or inside the thigh.

A

D. apply pressure to the pressure points on the inside of the upper arm or inside the thigh.

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3
Q
  1. (402) What is the body’s natural attempt to keep oxygen-rich blood flowing to the most important organs, such as the brain, heart, and lungs?

A. Sweating.
B. Bleeding.
C. Shock.
D. Fever.

A

C. Shock.

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4
Q
  1. (402) What is the proper rate for rescue breathing?

A. One breath every 5 seconds.
B. One breath every 15 seconds.
C. Two breaths every 5 seconds.
D. Two breaths every 15 seconds.

A

A. One breath every 5 seconds.

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5
Q
  1. (403) Everything in the universe is made of what?

A. Matter.
B. Electrons.
C. Compounds.
D. Valence shells.

A

A. Matter.

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6
Q
  1. (403) What are two or more different elements that are chemically joined called?

A. Matter.
B. Proton.
C. Molecule.
D. Compound.

A

D. Compound.

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7
Q
  1. (403) What is the purest part of a substance that can be broken down and retain its properties as that element?

A. Element.
B. Nucleus.
C. Electron.
D. Compound.

A

A. Element.

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8
Q
  1. (403) What is the smallest form of an element?

a. Atom.
b. Proton.
c. Element.
d. Molecule.

A

a. Atom.

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9
Q
  1. (403) What is the outermost shell of an atom called?

a. Ringer shell.
b. Facade shell.
c. Valence shell.
d. Connection shell.

A

c. Valence shell.

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10
Q
  1. (403) How many electrons do conductors have in the valence shell?
    a. Between 1 to 3.
    b. 4.
    c. Between 5 and 8.
    d. 9 or more.
A

a. Between 1 to 3.

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11
Q
  1. (403) In contrast to good conductors, we consider substances that have how many free electrons to be insulators?

a. Between 1 and 3.
b. 4.
c. Between 5 to 8.
d. 9 or more.

A

c. Between 5 to 8.

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12
Q
  1. (403) Semiconductors are not good conductors or insulators and are made of substances that have how many free electrons?

a. Between 1 and 3.
b. 4.
c. Between 5 and 8.
d. 9 or more.

A

b. 4.

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13
Q
  1. (403) What causes heat, chemical change, shock, electrocution, and magnetism to occur?
    a. Electrical pressure.
    b. Increased workload.
    c. Movement of electrons.
    d. Decreased surface area.
A

c. Movement of electrons.

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14
Q
  1. (403) When it comes to resistance in a piece of wire, what does a smaller surface area cause?
    a. Increased power.
    b. Lower resistance.
    c. Decreased power.
    d. Higher resistance.
A

d. Higher resistance.

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15
Q
  1. (403) What type of voltage normally maintains the same magnitude, but may vary?
    a. Alternating current (AC).
    b. Direct current (DC).
    c. Apparent power.
    d. Reactive power.
A

b. Direct current (DC).

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16
Q
  1. (403) What electrical terms does Ohm’s Law describe a relationship of?
    a. Voltage, current, and power.
    b. Resistance, current, and power.
    c. Resistance, voltage, and power.
    d. Voltage, current, and resistance.
A

d. Voltage, current, and resistance.

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17
Q
  1. (403) What is the relationship of current based on Ohm’s Law?

a. Directly proportional to power and directly proportional to voltage.
b. Inversely proportional to power and directly proportional to resistance.
c. Directly proportional to voltage and inversely proportional to resistance.
d. Inversely proportional to voltage and inversely proportional to resistance.

A

c. Directly proportional to voltage and inversely proportional to resistance.

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18
Q
  1. (404) What, besides a battery, can provide a power source for a direct current (DC) circuit?
    a. Rectifier.
    b. Oscillator.
    c. Generator.
    d. Transformer.
A

a. Rectifier.

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19
Q
  1. (404) What device allows you to control a direct current (DC) circuit manually?
    a. Relay.
    b. Switch.
    c. Rectifier.
    d. Transformer.
A

b. Switch.

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20
Q
  1. (404) What is the biggest difference between using a circuit breaker and a fuse?
    a. You won’t need to replace a circuit breaker when it trips.
    b. The fuse is large and only mounts externally to the circuit.
    c. The circuit breaker is smaller and will fit onto a circuit board.
    d. You will need to replace the circuit breaker every time it trips.
A

a. You won’t need to replace a circuit breaker when it trips.

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21
Q
  1. (405) What is the characteristic for total current in a direct current (DC) series circuit?
    a. Equal throughout the circuit.
    b. Lower than the lowest current reading.
    c. Product of the individual current readings.
    d. Sum of all of the individual current readings.
A

a. Equal throughout the circuit.

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22
Q
  1. (405) What is the characteristic of the total resistance in a parallel circuit?
    a. Same throughout the circuit.
    b. Sum of the individual resistors in the circuit.
    c. Less than the resistance of the smallest resistor.
    d. Product of the individual resistors in the circuit.
A

c. Less than the resistance of the smallest resistor.

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23
Q
  1. (405) What type of direct current (DC) circuit has more than one path for current to flow but have at least one resistor that receives the total circuit current passing through it?

a. Series circuit.
b. Simple circuit.
c. Parallel circuit.
d. Series-parallel circuit.

A

d. Series-parallel circuit.

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24
Q
  1. (405) What is the characteristic for total power in a series parallel circuit?
    a. Product of the power at the individual resistors.
    b. Less than the lowest power value at a resistor.
    c. Sum of the power at each individual resistor.
    d. The same throughout the circuit.
A

c. Sum of the power at each individual resistor.

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25
Q
  1. (405) What type of circuit typically has a parallel circuit with one or more legs having series portions?

a. Series circuit.
b. Parallel circuit.
c. Combination circuit.
d. Series parallel circuit.

A

c. Combination circuit.

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26
Q
  1. (406) In an alternating current (AC) circuit, how many electrical degrees does it take to form a complete cycle?

a. 90.
b. 18.
c. 270.
d. 360.

A

d. 360.

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27
Q
  1. (406) What does the vertical line (up and down) on a sine wave graph represents?

a. Magnitude.
b. Direction.
c. Distance.
d. Time.

A

a. Magnitude.

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28
Q
  1. (406) When you hear about the frequency of electricity, what is the timeframe the number of complete cycles that occur in?

a. 1 second.
b. 10 seconds.
c. 30 seconds.
d. 1 minute.

A

a. 1 second.

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29
Q
  1. (406) How many peaks does each cycle have in an alternating current (AC) voltage signal?

a. 1.
b. 2.
c. 3.
d. 4.

A

b. 2.

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30
Q
  1. (406) What do we refer to the percentage of peak voltage it took to produce the same amount of work as a direct current (DC) circuit as?

a. Effective value.
b. Standard value.
c. Average value.
d. Peak value.

A

a. Effective value.

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31
Q
  1. (407) Since the resistance acts a little different in an alternating current (AC) circuit, what do we refer to the resistance in an AC circuit as, which is represented by the X?

a. Reactance.
b. Inductance.
c. Opposition.
d. Capacitance.

A

a. Reactance.

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32
Q
  1. (407) What is an example of a use for a variable resistor?
    a. Winding for an electrical motor.
    b. Rectifier for a battery charger.
    c. Dimmer switch for a light.
    d. Coil for a power supply.
A

c. Dimmer switch for a light.

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33
Q
  1. (407) What is the effect if an inductor uses an iron core compared to one that has an air core?
    a. Less inductance.
    b. More inductance.
    c. Less capacitance.
    d. More capacitance.
A

b. More inductance

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34
Q
  1. (407) What are transformers made up of?

a. Two plates and dielectric.
b. One coil of wire and a core.
c. Two or more coils of wire and a core.
d. A piece of P-type and a piece of N-type material.

A

c. Two or more coils of wire and a core.

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35
Q
  1. (407) If the secondary coil of a transformer has less coil turns, what does the transformer do to meet circuit needs?

a. Steps the voltage level up.
b. Steps the voltage level down.
c. Maintains the voltage level the same.
d. Isolates the circuit from other components.

A

b. Steps the voltage level down.

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36
Q
  1. (407) What type of transformer only uses a secondary coil?
    a. Potential transformer.
    b. Isolation transformer.
    c. Current transformers.
    d. Power transformer.
A

c. Current transformers.

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37
Q
  1. (407) Since most of the capacitors you will see have a rating much lower than one farad, what do we refer to these as, represented by μf?

a. Microfarad.
b. Megafarad.
c. Minifarad.
d. Milifarad.

A

a. Microfarad.

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38
Q
  1. (407) What do we call the power created by inductance or capacitance?
    a. Apparent power.
    b. Reactive power.
    c. Evident power.
    d. True power.
A

b. Reactive power.

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39
Q
  1. (407) What do we call the power you think you are providing from your power source if you look at your voltage and current?

a. Apparent power.
b. Reactive power.
c. Evident power.
d. True power.

A

a. Apparent power.

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40
Q
  1. (407) How many volt amp (VA) is one kilovolt-amps (kVA) equal to?

a. 100 VA.
b. 1,000 VA.
c. 10,000 VA.
d. 100,000 VA.

A

b. 1,000 VA.

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41
Q
  1. (407) What formula do we use to determine the power factor?
    a. Power factor = true power / reactive power
    b. Power factor = true power / apparent power
    c. Power factor = evident power / apparent power
    d. Power factor = reactive power / evident power
A

b. Power factor = true power / apparent power

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42
Q
  1. (408) What occurs when we add impurities to the crystalline structure?

a. Doping.
b. Stuffing.
c. Infusing.
d. Dressing.

A

a. Doping.

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43
Q
  1. (409) What characteristic does the construction make the diode have?

a. Low resistance in one direction and a high resistance in the other.
b. Low resistance in both directions.
c. High resistance in both directions.
d. No resistance in both directions.

A

a. Low resistance in one direction and a high resistance in the other.

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44
Q
  1. (409) How much resistance does a diode offer to the current flow when the power source connects in the forward bias direction?

a. None.
b. Low.
c. Moderate.
d. High.

A

b. Low.

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45
Q
  1. (409) What is the bias of a diode when we connect the positive terminal of the battery to the N- type material and the negative terminal of the battery to the P-type material?

a. Forward.
b. Cathode.
c. Reverse.
d. Anode.

A

c. Reverse.

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46
Q
  1. (409) What happen when the majority carriers move outward allowing the barrier voltage to increase?

a. Decrease in the depletion region.
b. Increase in the depletion region.
c. Decrease in the forbidden band.
d. Increase in the forbidden band.

A

b. Increase in the depletion region.

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47
Q
  1. (409) What do we call the transformer on a full wave rectifier that has three terminals instead of two?

a. Tri-leg.
b. Center tap.
c. Multi output.
d. Middle wired.

A

b. Center tap.

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48
Q
  1. (409) What is a distinguishing feature of a bridge rectifier?

a. 1 diode.
b. 2 diodes.
c. 4 diodes.
d. 6 doides.

A

c. 4 diodes.

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49
Q
  1. (409) What is a distinguishing feature of a three-phase bridge rectifier?

a. 1 diode.
b. 2 diodes.
c. 4 diodes.
d. 6 diodes.

A

d. 6 diodes.

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50
Q
  1. (410) Since a static charge can be a hazard, when is it more severe?
    a. Arid, hot weather.
    b. Dry, cold weather.
    c. Wet, cool weather.
    d. Humid, warm weather.
A

b. Dry, cold weather.

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51
Q
  1. (410) At what voltage can static charges ignite gasoline fumes?

a. 1,500 volts.
b. 3,000 volts.
c. 5,000 volts.
d. 10,000 volts.

A

a. 1,500 volts.

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52
Q
  1. (410) What size ground must equipment in hazardous areas have for static charges?
    a. 16 American wire gauge (AWG).
    b. 10 AWG.
    c. 1/0 AWG.
    d. 2/0 AWG.
A

c. 1/0 AWG.

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53
Q
  1. (411) What consist of buried wires joined together to form a network of squares?
    a. Ground rods.
    b. Ground plates.
    c. Grid electrodes.
    d. Aluminum water pipe.
A

c. Grid electrodes.

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54
Q
  1. (411) Before making a connection to a ground, what should you check for?
    a. Tightness of the connector.
    b. Presence of electric current.
    c. Depth the ground rods is driven.
    d. Type of material the soil is made of.
A

b. Presence of electric current.

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55
Q
  1. (412) What type of system does current Air Force directives pertaining to grounding systems specify 10,000 ohms maximum for?

a. Static grounds.
b. Weapon system grounds.
c. Navigational system grounds.
d. Communications system grounds.

A

a. Static grounds.

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56
Q
  1. (412) What type of grounding pertains to the interconnecting and connection to earth of all noncurrent-carrying metal parts of an electrical wiring system?

a. Static.
b. Equipment.
c. Fuel systems.
d. Communication.

A

b. Equipment.

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57
Q
  1. (412) The resistance of most electrical system grounds below 600 VAC should be
    a. 10 ohms or less.
    b. 25 ohms or less.
    c. 125 ohms or less.
    d. 500 ohms or less.
A

b. 25 ohms or less.

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58
Q
  1. (413) When grounding petroleum, oil, and lubricant (POL) tanks, use at least two grounding rods for tanks with a circumference of 200 feet or less. At what distance of the tank circumference would you add another ground rod?

a. 25 feet.
b. 50 feet.
c. 100 feet.
d. 250 feet.

A

c. 100 feet.

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59
Q
  1. (414) How often do liquid-fuel maintenance personnel inspect ground cables in tank car and tank truck unloading areas, fill stands, fuel-dispensing areas, piers, and wharves?

a. Daily.
b. Weekly.
c. Monthly.
d. Annually.

A

c. Monthly.

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60
Q
  1. (415) What can you use to measure both ground resistance and ground circuit continuity, but it’s practical only for measuring static grounds with an ohms value above several thousand ohms?

a. Ammeter.
b. Megohmmeter.
c. Earth resistance tester.
d. Multimeter’s ohmmeter.

A

d. Multimeter’s ohmmeter.

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61
Q
  1. (415) Which test instrument do we use for testing a ground?
    a. Ammeter.
    b. Multimeter.
    c. Megohmmeter.
    d. Earth resistance tester.
A

d. Earth resistance tester.

62
Q
  1. (415) What method do we usually use when we need the resistance of single driven grounds?
    a. Auxiliary ground.
    b. Direct reference.
    c. Fall of potential.
    d. Straight line.
A

b. Direct reference.

63
Q
  1. (416) The specific gravity of battery electrolyte changes
    a. .004 for every 10 degrees in temperature change.
    b. .008 for every 25 degrees in temperature change.
    c. .027 for every 5 degrees in temperature change.
    d. .125 for every 2 degrees in temperature change.
A

a. .004 for every 10 degrees in temperature change.

64
Q
  1. (416) Visually check the electrolyte level in each cell of a battery. If the level is low, fill the cell to the proper level using

a. tap water.
b. sulfuric acid.
c. distilled water.
d. potassium acid.

A

c. distilled water.

65
Q
  1. (417) Where does a magnet have the greatest amount of magnetism?
    a. In the center.
    b. At the north pole.
    c. At the south pole.
    d. At each end of the magnet.
A

d. At each end of the magnet.

66
Q
  1. (417) What type of magnet does an alloy of aluminum, nickel, and cobalt make up?

a. Temporary.
b. Permanent.
c. Residual.
d. Electric.

A

b. Permanent.

67
Q
  1. (417) At what point in the generation of alternating current (AC) does the greatest number of magnetic lines of force cut the conductor causing the voltage to peak?

a. 45 degrees.
b. 90 degrees.
c. 180 degrees.
d. 270 degrees.

A

b. 90 degrees.

68
Q
  1. (418) What component has stationary field windings that provide the magnetic field to produce electricity?

a. Exciter.
b. Interpoles.
c. Alternator.
d. Field windings.

A

a. Exciter.

69
Q
  1. (418) What alternator component offers a slight magnetic force that aligns the main magnetic field so it remains most effective?

a. Rotor.
b. Interpoles.
c. Voltage regulator.
d. Damping windings.

A

b. Interpoles.

70
Q
  1. (418) What alternator component helps the generator maintain a stable voltage under varying load conditions?

a. Rotor.
b. Interpoles.
c. Voltage regulator.
d. Damping windings.

A

d. Damping windings.

71
Q
  1. (418) What type of voltage regulator uses a soft iron core at the exciter to create the initial voltage in the alternator?

a. Permanente magnetic.
b. Residual magnetic.
c. Manual flashing.
d. Self-exciting.

A

d. Self-exciting.

72
Q
  1. (419) What do most exciters use that retain residual magnetism?
    a. Galvanized cores.
    b. Soft iron cores.
    c. Mica cores.
    d. Air cores.
A

b. Soft iron cores.

73
Q
  1. (419) What does a voltage regulator sense if it increases the current to the exciter field windings causing the magnetic field to get stronger?

a. An increase in frequency.
b. A drop in voltage level.
c. An increase in load.
d. A drop in current.

A

b. A drop in voltage level.

74
Q
  1. (420) What type of alternator consists of a rotating magnetic field and a single set of stator coils?

a. Wye.
b. Delta.
c. Three phase.
d. Single phase.

A

d. Single phase.

75
Q
  1. (420) Which alternator configuration has three legs that all connect in the middle?
    a. Wye.
    b. Beta.
    c. Delta.
    d. Gamma.
A

a. Wye.

76
Q
  1. (420) How do we refer to the measurement of voltage between a phase and a neutral?

a. Line voltage.
b. Phase voltage.
c. Output voltage.
d. Winding voltage.

A

b. Phase voltage.

77
Q
  1. (420) What alternator configuration has no neutral that is common to all three phases?
    a. Wye.
    b. Beta.
    c. Delta.
    d. Gamma.
A

c. Delta.

78
Q
  1. (420) What type of alternator will you find connected to equipment of the industrial nature?
    a. Wye.
    b. Beta.
    c. Delta.
    d. Gamma.
A

c. Delta.

79
Q
  1. (421) What does it indicate if a diode has a high-resistance in one direction and a low-resistance in the other direction?

a. Open diode.
b. Good diode.
c. Shorted diode.
d. Reversed diode.

A

b. Good diode.

80
Q
  1. (421) What does it indicate if a diode has a low reading in both directions?

a. Open diode.
b. Good diode.
c. Shorted diode.
d. Reversed diode.

A

c. Shorted diode.

81
Q
  1. (421) What does it indicate if a diode has an infinity reading in both directions?

a. Open diode.
b. Good diode.
c. Shorted diode.
d. Reversed diode.

A

a. Open diode.

82
Q
  1. (421) What instrument is used to check the insulation resistance of an alternator?
    a. Multimeter.
    b. Megohmmeter.
    c. Clamp-on ammeter.
    d. Earth resistance tester.
A

b. Megohmmeter.

83
Q
  1. (421) What do most manufacturers recommend as the preferred method to dry wet alternator windings?

a. Air dry.
b. Space heaters.
c. Operate the alternator at low load.
d. Circulating low direct current (DC) voltage from an external source.

A

b. Space heaters.

84
Q
  1. (422) What are two classification of solder we use?

a. Metallic and non-metallic.
b. Pliable and non-pliable.
c. Rigid and flexible.
d. Hard and soft.

A

d. Hard and soft.

85
Q
  1. (422) What is the key to reliable soldering?

a. Clarity.
b. Low heat.
c. High heat.
d. Cleanliness.

A

d. Cleanliness.

86
Q
  1. (422) After cleaning and dressing the soldering tip, heat it and tin it with what?
    a. Flux.
    b. Solder.
    c. Leather.
    d. Steel wool.
A

b. Solder.

87
Q
  1. (423) What component is used with a voltmeter for a three-phase alternator to save money?
    a. Multi-tap transformers.
    b. Multiple pointers.
    c. Cheaper meters.
    d. Selector switch.
A

d. Selector switch.

88
Q
  1. (423) What type of transformer is used for an alternating current (AC) ammeter to step down the amount of current from the alternator in a ratio of 80 to 1?

a. Isolation transformer.
b. Current transformers.
c. Potential transformer.
d. Center tap transformer.

A

b. Current transformers.

89
Q
  1. (423) What meter indicates the true power load in an alternating current (AC) circuit?
    a. Ammeter.
    b. Voltmeter.
    c. Wattmeter.
    d. Power factor meter.
A

c. Wattmeter.

90
Q
  1. (423) What meter shows the percentage of the generator’s apparent power used as true power by the resistive load?

a. Ammeters.
b. Voltmeters.
c. Wattmeters.
d. Power factor meter.

A

d. Power factor meter.

91
Q
  1. (423) What will a capacitive load cause?

a. Current and voltage in phase.
b. Current to lead voltage.
c. Current to lag voltage.
d. Will have no effect.

A

b. Current to lead voltage.

92
Q
  1. (424) What should you inspect the vibration dampeners sometime used to mount a voltage regulator for?

a. Cracking and deterioration.
b. Security and discoloration.
c. Lubrication and dry rot.
d. Staining and wear.

A

a. Cracking and deterioration.

93
Q
  1. (424) If we are soldering the diode’s wiring, what must you use so the heat doesn’t damage the diode?

a. Heat sink.
b. Cold solder.
c. Cooling fan.
d. Low temperature.

A

a. Heat sink.

94
Q
  1. (424) What component typically secures the knob on a control panel?

a. Glue.
b. Setscrew.
c. Lock washer.
d. Securing clip.

A

b. Setscrew.

95
Q
  1. (425) What is a relay’s only moving part?

a. Coil.
b. Plunger.
c. Contacts.
d. Armature.

A

d. Armature.

96
Q
  1. (425) What type of relay is completely self-contained and has no moving parts?

a. Capacitive.
b. Solid state.
c. Inductive.
d. Isolation.

A

b. Solid state.

97
Q
  1. (426) What does the closing assembly of a circuit breaker usually consist of?
    a. Arc chutes and a tripping coil.
    b. Advancing motor and distribution points.
    c. Closing coil or motor and a control switch.
    d. Closing transformer and adjustable resistors.
A

c. Closing coil or motor and a control switch.

98
Q
  1. (426) What is a relay equipped with to align the coil and contact pins to the base?
    a. Keyway.
    b. Template.
    c. Pin diagram.
    d. Larger coil pins.
A

a. Keyway.

99
Q
  1. (406) What do we refer to the percentage of peak voltage it took to produce the same amount of work as a direct current (DC) circuit as?

a. Standard value.
b. Average value.
c. Peak value.
d. Effective value.

A

d. Effective value.

100
Q
  1. (403) What is the smallest form of an element?

a. Molecule.
b. Element.
c. Atom.
d. Proton.

A

c. Atom.

101
Q
  1. (415) What can you use to measure both ground resistance and ground circuit continuity, but it’s practical only for measuring static grounds with an ohms value above several thousand ohms?

a. Megohmmeter.
b. Ammeter.
c. Earth resistance tester.
d. Multimeter’s ohmmeter.

A

d. Multimeter’s ohmmeter.

102
Q
  1. (403) In contrast to good conductors, we consider substance that have how many free electrons to be insulators?

a. 4
b. Between 1 and 3.
c. Between 5 to 8.
d. 9 or more.

A

c. Between 5 to 8.

103
Q
  1. (405) What is the characteristic for total power in a series parallel circuit?
    a. Product of the power at the individual resistors.
    b. Less than the lowest power value at a resistor.
    c. The same throughout the circuit.
    d. Sum of the power at each individual resistor.
A

d. Sum of the power at each individual resistor.

104
Q
  1. (421) What does it indicate if a diode has an infinity reading in both directions?
    a. Shorted diode.
    b. Open diode.
    c. Good diode.
    d. Reverse diode.
A

b. Open diode.

105
Q
  1. (417) At what point in the generation of alternating current (AC) does the greatest number of magnetic lines of force cut the conductor causing the voltage to peak?

a. 270 degrees.
b. 90 degrees.
c. 180 degrees.
d. 45 degrees.

A

b. 90 degrees.

106
Q
  1. (407) What type of transformer only uses a secondary coil?
    a. Current transformers.
    b. Power transformer.
    c. Potential transformer.
    d. Isolation transformer.
A

a. Current transformers.

107
Q
  1. (420) What type of alternator consists of a rotating magnetic field and a single set of stator coils?
    a. Three phase.
    b. Wye.
    c. Single phase.
    d. Delta.
A

c. Single phase.

108
Q
  1. (405) What is the characteristic of the total resistance in a parallel circuit?
    a. Same throughout the circuit.
    b. Less than the resistance of the smallest resistor.
    c. Product of the individual resistors in the circuit.
    d. Sum of the individual resistors in the circuit.
A

b. Less than the resistance of the smallest resistor.

109
Q
  1. (421) What does it indicate if a diode has a low reading in both directions?
    a. Good diode.
    b. Shorted diode.
    c. Reversed diode.
    d. Open diode.
A

b. Shorted diode.

110
Q
  1. (402) What is the proper rate for rescue breathing?
    a. Two breaths every 5 seconds.
    b. One breath every 15 seconds.
    c. One breath every 5 seconds.
    d. Two breaths every 15 seconds.
A

c. One breath every 5 seconds.

111
Q
  1. (409) What is a distinguishing feature of a three-phase bridge rectifier?
    a. 6 diodes.
    b. 1 diode.
    c. 4 diodes.
    d. 2 diodes.
A

a. 6 diodes.

112
Q
  1. (401) What is the minimum amount of current that can kill you?
    a. One tenth of an amp (0.1 A or 100 mA).
    b. One amp (1 A or 100 mA).
    c. One hundredth of an amp (0.01 A or 10 mA).
    d. One thousandths of an amp (0.001 A or 1 mA).
A

a. One tenth of an amp (0.1 A or 100 mA).

113
Q
  1. (417) What type of magnet does an alloy of aluminum, nickel, and cobalt make up?
    a. Residual.
    b. Electric.
    c. Permanent.
    d. Temporary.
A

c. Permanent.

114
Q
  1. (423) What type of transformer is used for an alternating current (AC) ammeter to step down the amount of current from the alternator in a ratio of 80 to 1?

a. Isolation transformer.
b. Potential transformer.
c. Center tap transformer.
d. Current transformers.

A

d. Current transformers.

115
Q
  1. (421) What does it indicate if a diode has a high-resistance in one direction and a low-resistance in the other direction?

a. Open diode.
b. Shorted diode.
c. Good diode.
d. Reversed diode.

A

c. Good diode.

116
Q
  1. (409) What characteristic does the construction make the diode have?
    a. Low resistance in both directions.
    b. No resistance in both directions.
    c. Low resistance in one direction and a high resistance in the other.
    d. High resistance in both directions.
A

c. Low resistance in one direction and a high resistance in the other.

117
Q
  1. (414) How often do liquid-fuel maintenance personnel inspect ground cables in tank car and tank truck unloading areas, fill stands, fuel-dispensing areas, piers, and wharves?

a. Daily.
b. Annually.
c. Monthly.
d. Weekly.

A

c. Monthly.

118
Q
  1. (406) When you hear about the frequency of electricity, what is the timeframe the number of complete cycles that occur in?

a. 10 seconds.
b. 30 seconds.
c. 1 second.
d. 1 minute.

A

c. 1 second.

119
Q
  1. (415) What method do we usually use when we need the resistance of single driven grounds?
    a. Direct reference.
    b. Fall of potential.
    c. Auxiliary ground.
    d. Straight line.
A

a. Direct reference.

120
Q
  1. (409) What is the bias of a diode when we connect the positive terminal of the battery to the N- type material and the negative terminal of the battery to the P-type material?

a. Reverse.
b. Cathode.
c. Anode.
d. Forward.

A

a. Reverse.

121
Q
  1. (422) What are two classification of solder we use?

a. Metallic and non-metallic.
b. Hard and soft.
c. Rigid and flexible.
d. Pliable and non-pliable.

A

b. Hard and soft.

122
Q
  1. (425) What type of relay is completely self-contained and has no moving parts?
    a. Isolation.
    b. Capacitive.
    c. Solid state.
    d. Inductive.
A

c. Solid state.

123
Q
  1. (418) What alternator component offers a slight magnetic force that aligns the main magnetic field so it remains most effective?

a. Damping windings.
b. Voltage regulator.
c. Rotor.
d. Interpoles.

A

d. Interpoles.

124
Q
  1. (409) What happens when the majority carriers move outward allowing the barrier voltage to increase?

a. Decrease in the forbidden band.
b. Decrease in the depletion region.
c. Increase in the forbidden band.
d. Increase in the depletion region.

A

d. Increase in the depletion region.

125
Q
  1. (403) When it comes to resistance in a piece of wire, what does a smaller surface area cause?
    a. Decreased power.
    b. Lower resistance.
    c. Increased power.
    d. Higher resistance.
A

d. Higher resistance.

126
Q
  1. (407) If the secondary coil of a transformer has more coil turns, what does the transformer do to meet circuit needs?

a. Isolates the circuit from other components.
b. Maintains the voltage level the same.
c. Steps the voltage level up.
d. Steps the voltage level down.

A

c. Steps the voltage level up.

127
Q
  1. (403) What is the outermost shell of an atom called?

a. Façade shell.
b. Valence shell.
c. Connection shell.
d. Ringer shell.

A

b. Valence shell.

128
Q
  1. (405) What type of circuit typically has a parallel circuit with one or more legs having series portions?

a. Parallel circuit.
b. Combination circuit.
c. Series circuit.
d. Series parallel circuit.

A

b. Combination circuit.

129
Q
  1. (420) What alternator configuration has no neutral that is common to all three phases?
    a. Delta.
    b. Gamma.
    c. Wye.
    d. Beta.
A

a. Delta.

130
Q
  1. (424) What component typically secures the knob on a control panel?
    a. Setscrew.
    b. Lock washer.
    c. Securing clip.
    d. Glue.
A

a. Setscrew.

131
Q
  1. (403) What causes heat, chemical change, shock, electrocution, and magnetism to occur?
    a. Movement of electrons.
    b. Decreased surface area.
    c. Increased workload.
    d. Electrical pressure.
A

a. Movement of electrons.

132
Q
  1. (403) What type of voltage normally maintains the same magnitude, but may vary?
    a. Apparent power.
    b. Alternating current (AC).
    c. Direct current (DC).
    d. Reactive power.
A

c. Direct current (DC).

133
Q
  1. (412) What type of grounding pertains to the interconnecting and connection to earth of all noncurrent-carrying metal parts of an electrical wiring system?

a. Equipment.
b. Communication.
c. Static.
d. Fuel system.

A

a. Equipment.

134
Q
  1. (406) What does the vertical line (up and down) on a sine wave graph represent?
    a. Magnitude.
    b. Distance.
    c. Direction.
    d. Time.
A

a. Magnitude.

135
Q
  1. (416) The specific gravity of battery electrolyte changes?
    a. .008 for every 25 degrees in temperature change.
    b. .004 for every 10 degrees in temperature change.
    c. .125 for every 2 degrees in temperature change.
    d. .027 for every 5 degrees in temperature change.
A

b. .004 for every 10 degrees in temperature change.

136
Q
  1. (407) What do we call the power you think you are providing from your power source if you look at your voltage and current?

a. Reactive power.
b. Apparent power.
c. True power.
d. Evident power.

A

b. Apparent power.

137
Q
  1. (424) If we are soldering the diode’s wiring, what must you use so the heat doesn’t damage the diode?

a. Cold solder.
b. Cooling fan.
c. Low temperature.
d. Heat sink.

A

d. Heat sink.

138
Q
  1. (420) What type of alternator will you find connected to equipment of the industrial nature?
    a. Beta.
    b. Gamma.
    c. Wye.
    d. Delta.
A

d. Delta.

139
Q
  1. (421) What instrument is used to check the insulation resistance of an alternator?
    a. Earth resistance tester.
    b. Megohmmeter.
    c. Multimeter.
    d. Clamp-on ammeter.
A

b. Megohmmeter.

140
Q
  1. (406) How many peaks does each cycle have in an alternating current (AC) voltage signal?
    a. 2.
    b. 3.
    c. 1.
    d. 4.
A

a. 2.

141
Q
  1. (404) What device allows you to control a direct current (DC) circuit manually?
    a. Switch.
    b. Rectifier.
    c. Relay.
    d. Transformer.
A

a. Switch.

142
Q
  1. (401) What should you use to move the victim or conductor away from a person connected to a live circuit if the power cannot be turned off?

a. Insulated object.
b. Wet rope.
c. Galvanized conductor.
d. Bare hands.

A

a. Insulated object.

143
Q
  1. (423) What will a capacitive load cause?

a. Current and voltage in phase.
b. Current to lag voltage.
c. Will have no effect.
d. Current to lead voltage.

A

d. Current to lead voltage.

144
Q
  1. (403) What is the relationship of current based on Ohm’s Law?

a. Directly proportional to voltage and inversely proportional to resistance.
b. Inversely proportional to voltage and inversely proportional to resistance.
c. Inversely proportional to power and directly proportional to resistance.
d. Directly proportional to power and directly proportional to voltage.

A

a. Directly proportional to voltage and inversely proportional to resistance.

145
Q
  1. (407) What is an example of a use for a variable resistor?
    a. Rectifier for a battery charger.
    b. Dimmer switch for a light.
    c. Winding for an electrical motor.
    d. Coil for a power supply.
A

b. Dimmer switch for a light.

146
Q
  1. (415) Which test instrument do we use for testing a ground?
    a. Megohmmeter.
    b. Ammeter.
    c. Earth resistance tester.
    d. Multimeter.
A

c. Earth resistance tester.

147
Q
  1. (405) What type of direct current (DC) circuit has more than one path for current to flow but have at least one resistor that receives the total circuit current passing through it?

a. Series circuit.
b. Parallel circuit.
c. Simple circuit.
d. Series-parallel circuit.

A

d. Series-parallel circuit.

148
Q
  1. (403) How many electrons do conductors have in the valence shell?
    a. 4.
    b. Between 5 and 8.
    c. Between 1 to 3.
    d. 9 or more.
A

c. Between 1 to 3.

149
Q
  1. (420) Which alternator configuration has three legs that all connect in the middle?

a. Gamma.
b. Wye.
c. Delta.
d. Beta.

A

b. Wye.

150
Q
  1. (401) What is the minimum amount of current that can kill you?

A. One thousandths of an amp (0.001 A or 1 mA).
B. One hundredth of an amp (0.01 A or 10 mA).
C. One tenth of an amp (0.1 A or 100 mA).
D. One amp (1 A or 1000 mA).

A

C. One tenth of an amp (0.1 A or 100 mA).

CDC 3E052C Volume 3. Electrical Systems (1 decks)

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