Auto 60 Mid term update

32. A loose ground connection ________.

Causes less power to be available to the electrical components and Causes reduced current flow

5. A reading of 432 shows on the face of the meter set to the millivolt scale. The reading means ________.

0.432 volt

91. A type of electronic battery tester that does NOT place a load on the battery is called a(n) ________.

Conductance tester

80. Cycles per second are expressed in

Herts

31. Ammeters should be connected ________ with the circuit being tested.

In series

56. The fact that voltage can be created by exerting force on a crystal is used for which type of sensor?

Knock sensor (KS)

60. If resistance is reduced in a series circuit, ________ current will flow.

More

73. The higher the resistance of a load in a series circuit, the ________ the voltage drop across that load.

More

27. Which of these describes electrical power?

Watts

13. According to the text, hybrid vehicle high voltage batteries can have voltages as high as ________.

300V

11. Which terminal of the OBD-II data link connector is the chassis ground for all vehicles?

4

36. Semiconductors have how many electrons in their valence rings?

4

22. If 12 volts are being applied to a resistance of 3 ohms, ________ amperes will flow.

4 amps

83. Which terminal of the OBD-II data link connector is the signal ground for all vehicles?

5

95. A battery measures 12.4 volts after removing the surface charge. This battery is charged at what percent?

75%

89. During the load testing, battery voltage should not drop below ________ volts.

9.6V at 15 seconds

76. Two technicians are discussing the DC coupling setting on a DSO. Technician A says that the position allows both the DC and AC signals of the waveform to be displayed. Technician B says that this setting allows just the DC part of the waveform to be displayed. Which technician is correct?

A only

96. Technician A says that battery load test loads the battery to one-half of its CCA rating. Technician B says that a good battery should be able to maintain higher than 9.6 volts for a 25 second test period. Who is right?

A only

97. Technician A says that distilled or clean drinking water should be added to a battery when the electrolyte level is low. Technician B says that fresh electrolyte (solution of acid and water) should be added. Which technician is correct?

A only

65. The current flowing into each junction of a parallel circuit ________ the current flow at the junction on the opposite end of that branch.

Equals

33. kHz is a unit describing what property?

Frequency

81. Which of these is a computer output?

Fuel injector, Trans shift soleniod, evap emmission control solenoid

64. A digital meter that can show waveforms is a ________.

GMM

55. A high-impedance meter ________.

Has a high internal resistance

57. Parallel circuits ________.

Have more than one path for current flow and Current flow through each branch of the circuit depends on the resistance present in that branch

40. A voltmeter should be connected to the circuit being tested ________.

In parallel

47. If the voltage increases in a circuit, what happens to the current (amperes) if the resistance stays the same?

Increases

25. Which type of DMM can measure current when clamped around a conductor?

Inductive

74. The total circuit resistance of a parallel circuit is always ________ the lowest resistance present in any branch of the circuit.

Less than

51. Corrosion on electrical terminals may cause ________.

Lights to be dimmer than normal

69. More electrical current will flow through the branch of a parallel circuit with the ________ resistance.

Lowest

82. The process of sending multiple signals of information at the same time over a signal wire and then separating the signals at the receiving end is which of these?

Multiplexing

20. Electrical power is calculated by ________.

Multiplying volts by current

61. Two light bulbs are wired in series and one bulb burns out (opens.) Technician A says that the other bulb will work. Technician B says that the current will increase in the circuit because one electrical load (resistance) is no longer operating. Which technician is correct?

Nither

30. In an incomplete circuit ________.

No current will flow no volts

44. An ohmmeter should be connected to the circuit or component being tested ________.

Only when no power is flowing (electrically open circuit) and In parallel

43. When measuring resistance, a reading of OL on the DMM indicates ________.

Open

21. Which term describes electrical current resulting from pressure applied to certain crystals?

Piezoelectricity

3. Which term describes electrical current resulting from pressure applied to certain crystals?

Piezoelectricity

34. Voltage supplied to a potentiometer may be called ________.

Reference voltage

37. Carbon and silicon are examples of ________.

Semiconductors

3. Which circuit is failure is most likely to cause a fuse to blow?

Short to ground

41. If an insulated (power side) wire rubbed through a part of the insulation and the wire conductor touched the steel body of a vehicle, the type of failure would be called a(an) ________.

Short-to-ground

50. If an insulated (power side) wire rubbed through a part of the insulation and the wire conductor touched the steel body of a vehicle, the type of failure would be called a(an) ________.

Short-to-ground

54. If two insulated wires were to melt together where the copper conductors touched each other, the type of failure would be called a(an) ________.

Short-to-voltage

70. The sum of the voltage drops in a series circuit equals the ________.

Source voltage

72. In a series circuit, total circuit resistance is equal to the ________ of the resistance of all loads in the circuit.

Sum

98. In parallel circuits

There is more than one path for current flow, Current flow through each branch of the circuit on the resistance present in the branch

2. Which device produces electrical current resulting from heating of two dissimilar conductors?

Thermocouple

19. A potentiometer usually has how many wires?

Three

66. What is the purpose of a dioed in relay?

To control voltage spikes

71. In a series circuit ________.

Total circuit resistance is equal to the sum of all resistances in the circuit, Current flow is constant at any point in the circuit and total v drop equals source voltage

10. What unit of electricity is used as a signal for a computer?

Volt

23. The ________ is a unit of electrical pressure.

Volt

56. Kirchhoff's law states that the voltage around a closed circuit is equal to the sum of ________ across all the loads.

Voltage drops

6. The internal resistance of any meter is only effective if the meter is set on the ________ scales.

Voltmeter

37. Which of these is also known as electrical potential or pressure?

Volts

39. Which of these describes electrical power?

Watts

68. A semiconductor is a material ________.

With exactly four electrons in the outer orbit of its atoms

57. Technician A says that class A fires consist of burning liquid. Technician B says that water should be used to extinguish class B fires. Which technician is correct

neither

100. A sheet metal screw holding a metal body panel has pierced the insulation of a power wire and is touching the copper strands. This is known as a ________.

short to ground

120. In a series circuit, total circuit resistance is equal to the _______ of the resistance of all loads in the circuit

sum

97. A reading of 432 shows on the face of the DMM set to the milivolt scale. the reading means

.432volts

84. Terminal 16 of the OBD-II data link connector is used for what?

12 volt pos

79. A series circuit has three resistors of 4 oms each. The v drop across each is 4 volts. t volts is ____V total resistance is

12V and 12 ohms

93. When performing a battery load test, how many seconds should the load be applied?

15

46. A rheostat usually has how many wires?

2

77. Calculate the total resistance and current in a 12 volt parallel circuit with three resistors of 4 ohms, 8 ohms, and 16 ohms, using any one of the five methods (calculator suggested). What is the total resistance and current?

2.3 ohms (5.3 amperes)

52. If 200 amperes flow from the positive terminal of a battery and operate the starter motor, how many amperes will flow back to the negative terminal of the battery?

200 amps

35. An electrical circuit uses 12 volts and has a current flow of 2 amps. What is the wattage?

24 watts

63. "Breakdown voltage" is the voltage at which a Zener diode will do which of these?

Allow reverse current to flow

67. A Zener diode is a semiconductor device that ________.

Allows current to flow not only from its anode to its cathode, but also in the reverse direction, when the Zener voltage is reached.

49. Which unit of electricity does the work in the circuit?

Ampere

29. A DMM is set to read ohms. The reading of OL shown means ________.

An open circuit

9. Clamping diodes ________.

Are connected into a circuit with the positive voltage source to the cathode and the negative voltage to the anode, Are called despiking diodes, and Can suppress transient voltages

87. Terminal 16 of the OBD-II data link connector is used for what?

Bat 12V+

29. Technician A says to use lineman's gloves when servicing the high voltage system on hybrid electric vehicles. Technician B says that hybrid vehicles have a plug to disable the high voltage system before service. Which technician is correct?

Both

75. Technician A says that the sum of the voltage drops in a series circuit should equal the source voltage. Technician B says the current (amperes) varies depending on the value of the resistance in a series circuit. Which technician is correct?

Both

86. Technician A says that module communications networks are used to reduce the number of wires in a vehicle. Technician B says that a communications network is used to share data from sensors, which can be used by many different modules. Who is right?

Both

90. What battery rating is tested at 32°F (0°C)?

CA cranking amps

53. When working on a hybrid vehicle, which type of meter is recommended?

CAT III or CAT IV

12. Which battery rating is tested at 0°F (-18°C)?

CCA cold cranking amps

14. When load testing a battery, which battery rating is usually used to determine how much load to apply to the battery

CCA usualy 1/2 CCA

18. Excessive corrosion on an electrical connector ________.

Can cause lights to be dim

59. A diode installed across a coil with the cathode toward the battery positive is called a(n) ________.

Clamping diode

24. Most carbon resistors indicate their electrical resistance by ________.

Color coded markings

48. Conductors that become too hot ________.

Create excessive resistance and Could be the result of a short to ground before the load

99. As additional branches are added to a parallel circuit total circuit resistance

Decreases

71. Which device is used in alternators to change AC to DC?

Diode

26. What term describes the movement of electrons from one atom to another?

Electricity

17. The automotive battery is based on the principle of ________.

Electrochemistry

94. Technician A says that an AGM battery can be charged with any battery charger. Technician B says that an AGM battery requires a charger specially designed for charging AGM batteries. Who is correct?

Technician B only

92. An AGM battery differs from a conventional flooded battery in what way?

The electrolyte is absorbed into glass separator and will not spill

88. When jump starting, ________.

The last connection should be the engine block of dead vehicle

45. As temperature increases, ________.

The resistance of a conductor increases

62. Voltage drop is a better measurement of resistance than testing static resistance because ________.

The resistance specification for the component is not required for diagnosis and Current flow creates heat which adds to circuit resistance

78. The amperage in a series circuit is

The same anywhere in the circuit

1. When jump-starting a vehicle, which of these connections is the last connection to be made?

ground on vehicle being jumped

85. Which computer function is defined as a voltage signal from a sensor or switch?

input

7. The transistor operates like a relay in that ________

its base is like a coil, and its emitter and collector are like a set of contacts