Deck 3: Electrical and Electronic Componentsbasic Electrical Troubleshooting and Service

Question 1

Switches are the least common means of providing control of electrical current flow to an accessory.

Answer 1

False

Question 2

Voltage drop can exist on the power side as well as the ground side of an electrical circuit.

Answer 2

True

Question 3

In a PNP transistor both the base and the collector must be negative in respect to the emitter for current to flow through the emitter to the collector.

Answer 3

True

Question 4

Direction of current flow through a diode can be identified by a band around the cathode end.

Question 5

Circuit protectors are usually found on the negative side of the circuit.

Question 6

Technician A says an open circuit has no breaks in the path and current will flow. Technician B says in a closed circuit the circuit path is broken. Who is correct?

A) Technician  A only
B) Technician  B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 7

The load current flowing through a transistor passes through the emitter and the base circuit.

Question 8

The trigger selection tells the lab scope when to begine to display a waveform.

Question 9

A voltmeter placed across the terminals of an inoperative electric window motor indicates 12 volts when the window switch is depressed. Technician A says the window ground circuit may be faulty. Technician B says the window power feed circuit may be faulty. Who is correct?

A) Technician  A only
B) Technician  B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 10

A short circuit will result when a current carrying wire is grounded before reaching the load.

Question 11

Technician A says if a fuse blows as soon as it is installed, a short to ground is indicated. Technician B says the component will not turn off if the short to ground is on the ground side of the load component but before a grounding switch. Who is correct?

A) Technician  A only
B) Technician  B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 12

Technician A s ays both an ohmmeter and a self-powered test light may be used to test for continuity. Technician B says both may be used to test fuses. Who is correct?

A) Technician  A only
B) Technician  B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 13

What will a Zener diode do at breakdown voltage?

A) Allow reverse current to flow
B) Stop the flow of reverse current
C) Sustain damage as a result of current overload
D) Stop the flow of either forward or reverse current

Question 14

Technician A says a fuse will automatically reset after the cause of the overload is repaired. Technician B says when an overload occurs, the protection device creates an open. Who is correct?

A) Technician  A only
B) Technician  B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 15

An inoperative horn is being tested. A DVOM placed across the relay load contact terminals indicates battery voltage when the horn button is pushed. A "click" is heard from the relay when the button is pushed. Technician A says the relay is bad. Technician B says the relay coil circuit is bad. Who is correct?

A) Technician  A only
B) Technician  B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 16

Technician A says a Zener diode is an excellent component for regulating voltage. Technician B says when a circuit is opened suddenly to a large load, such as a coil, installing a clamping diode provides a bypass for the electrons. Who is correct?

A) Technician  A only
B) Technician  B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 17

The frame of the vehicle is normally attached to the negative battery post.

Question 18

The leads of a DMM with a diode check function are placed across the terminals of a diode and then reversed. A 0.6 volt reading is obtained in both directions. Technician A says this means the diode is shorted. Technician B says this means the diode is acceptable. Who is correct?

A) Technician  A only
B) Technician  B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 19

Technician A says a stepped resistor should be disconnected from the circuit before testing it with an ohmmeter. Technician B says that a relay may be tested while it is connected to the circuit. Who is correct?

A) Technician  A only
B) Technician  B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 20

Throttle position sensors are variable resistors with two wires attached.

Question 21

The greatest advantage of a digital storage oscilloscope (DSO) is the ____ at which it samples electrical signals.

A) speed
B) range
C) frequency
D) complexity

Question 22

The term ____ means a circle and is the path of electron flow consisting of the voltage source, conductors, load component, and return path to the voltage source.

A) parallel
B) circuit
C) diode
D) series

Question 23

Whenever the brake pedal is pressed the left-rear and right-rear taillights, and the left rear and the right-rear brake light of a vehicle illuminate dimly. Technician A says the brake lights may have a poor ground connection. Technician B says the brake light switch may have excessive resistance. Who is correct?

A) Technician  A only
B) Technician  B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 24

Technician A says to test fuses you could use a voltmeter or a test light. Technician B says a voltmeter and a test light are connected in parallel. Who is correct?

A) Technician  A only
B) Technician  B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 25

A(n) ____ is the most common means of providing control of electrical current flow to an accessory.

A) outlet
B) switch
C) pole
D) throw

Question 26

Technician A s ays a shorted circuit can generate excessive heat. Technician B says a shorted circuit will cause the circuit protection device to open. Who is correct?

A) Technician  A only
B) Technician  B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 27

A diode that allows current flow in both directions is ____.

A) open
B) typical
C) high-impedance
D) shorted

Question 28

A(n) ____ is designed to turn off the system whenever excessive current or an overload occurs.

A) Gauss gauge
B) solenoid
C) protection device
D) oscilloscope

Question 29

The circuit breaker that protects a power window circuit opens whenever the window is lowered. Technician A says the internal resistance of the motor is too high. Technician B says the window regulator may be sticking. Who is correct?

A) Technician  A only
B) Technician  B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 30

____ is the electrical pressure that causes electrons to move provided there is a complete path for them to do so.

A) Current
B) Resistance
C) Circuit
D) Voltage

Question 31

How are fuses rated?

A) By current capacity.
B) By voltage capacity.
C) By resistance capacity.
D) By power capacity.

Question 32

Which of the following is true about a clamping diode?

A) It is used to protect some solid-state circuitry.
B) It cannot be tested with an ohmmeter.
C) It is not used on modern vehicles.
D) It cannot be tested with a self-powered test light.

Question 33

Which of the following is true of the LED?

A) It produces a red, green, or yellow light.
B) It only contains an anode.
C) It requires an external light source.
D) All of these choices.

Question 34

A ____ is a special type of configuration usually consisting of two transistors fabricated on the same chip or mounted in the same package.

A) D'Arsonval
B) Zener diode
C) DERM
D) Darlington pair

Question 35

Technician A says you may replace a fusible link with a larger gauge wire. Technician B says a burned-out fuse indicates a larger-rated fuse should be used. Who is correct?

A) Technician  A only
B) Technician  B only
C) Both Technician A and B
D) Neither Technician A nor B

Question 36

Which of the following is NOT true of forward-bias in a diode?

A) Free electrons in the N-material and holes in the P-material both move toward the junction.
B) N-material electrons move across the junction to fill the holes in the P-material.
C) Negatively charged holes left behind in the N-material attract electrons from the negative voltage source.
D) The free electrons that moved into the P-material continue to move toward the positive voltage source.

Question 37

A(n) ____ resistor has two or more fixed resistor values.

A) dual
B) stepped
C) variable
D) inductive

Question 38

A(n) ____ is a device that uses low current to control a high-current circuit.

A) ohmmeter
B) relay
C) opening switch
D) coil

Question 39

A ____ is a conductor with a special heat-resistant insulation.

A) cartridge
B) blade
C) fusible link
D) ceramic

Question 40

To use a transistor as a simple solid-state relay, what conditions must occur?

A) The emitter-base junction must be reverse biased, and the collector-base junction must be forward biased.
B) The emitter-base junction must be forward biased, and the collector-base junction must be reverse biased.
C) The emitter-base junction and the collector-base junction both must be forward biased.
D) The emitter-base junction and the collector-base junction both must be reverse biased.

Question 41

Describe how to test a capacitor.

Question 42

What solid state electronic device only requires a trigger pulse to its gate to become conductive?

Question 43

Transistors are made by combining P-type and N-type materials in groups of ____.

A) two
B) three
C) four
D) six

Question 44

What size fuse should be installed in an electrical circuit?

Question 45

What does a switch control?

Question 46

What electronic device functions as a one-way check valve that allows current to flow in one direction only?

Question 47

What does excessive current flow in a circuit cause?

Question 48

Name the figure below and describe how it works.

Question 49

A potentiometer is a three-wire ____ that acts as a voltage divider to produce a continuously variable output signal proportional to a mechanical position.

A) load device
B) variable resistor
C) rheostat
D) measuring device

Question 50

Name the figure below and describe how it works.

Question 51

What device or devices use a low current input to control a high current output?

Question 52

Explain an open diode and a shorted diode.

Question 53

Describe how to locate a short to ground that causes the fuse to blow.

Question 54

Some automotive electrical systems use a capacitor or condenser to ____ electrical charges.

A) convert
B) discharge
C) store
D) transfer

Question 55

Because a semiconductor material can operate as both a conductor and an insulator, it is very useful as a ____ device.

A) switching
B) load bearing
C) storage
D) resistive

Question 56

What is a complex circuit of many electrical devices such as transistors, diodes and logic gates called?

Question 57

If a diode is ____, there will be current flow.

A) N-type material
B) reversed-biased
C) forward-biased
D) P-type material

Question 58

What are transistors frequently used as?

Question 59

What is a three-layer semiconductor that is commonly used as a very fast switching device?

Question 60

Identify the three leads that both NPN and PNP have.