Deck 3: Electrical and Electronic Components Basic Electrical Troubleshooting and Service

Question 1

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.

Answer 1

A

Question 2

A "blown" fusible link is identified by:

A) A burned-through metal wire in the capsule.
B) A bubbling of the insulator material around the link.
C) All of these choices.
D) None of these choices.

Answer 2

C

Question 3

What usually causes a fuse to "blow"?

A) Too much voltage .
B) Too much amperage .
C) Too little voltage.
D) Too little resistance .

Answer 3

B

Question 4

The light-emitting diode (LED):

A) Emits light when it is reverse biased.
B) Has a variable turn-on voltage.
C) Has a light color that is defined by the materials used to construct the diode.
D) Has a turn-on voltage that is usually less than standard diodes.

Question 5

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 analog ohmmeter .
C) It is not used on modern vehicles .
D) It cannot be tested with a check function on a DMM .

Question 6

Which statement is true concerning circuit protection devices?

A) A fuse automatically resets after the cause of the overload is repaired.
B) Circuit protection devices create an open when an overload occurs.
C) An open circuit can cause a blown fuse.
D) Fuses are rated according to the voltage limits.

Question 7

Which statement is correct concerning diodes?

A) Diodes are aligned to allow current flow in one direction only.
B) Diodes can be used to rectify DC voltages into AC voltages.
C) The stripe is on the anode side of the diode.
D) Normal turn-on voltage of a standard diode is 1.5 volts.

Question 8

A capacitor:

A) Consumes electrical power.
B) Induces voltage.
C) All of these choices.
D) None of these choices.

Question 9

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 10

Which of the following is NOT used to protect a circuit from too much current flow?

A) Fuses .
B) Busbars .
C) Fusible links .
D) Circuit breakers .

Question 11

Which of the following statements is/are correct?

A) A zener diode is an excellent component for regulating voltage.
B) A forward-biased diode lasts longer than a reverse-biased diode.
C) The switches of a transistor last longer than those of a relay.
D) All of these choices.

Question 12

An LED does not light. A voltmeter indicates 0 volts across the LED. All of the following can be the cause EXCEPT:

A) Current-limiting resistor is open.
B) The LED is open.
C) Short to ground between the current-limiting resistor and the LED.
D) Open ground circuit.

Question 13

Which of the following is the correct statement?

A) An open means that there is continuity in the circuit.
B) A short bypasses a portion of the circuit.
C) High amperage draw indicates an open circuit.
D) High resistance in a circuit increases current flow.

Question 14

A voltmeter that is connected across the input and output terminals of an instrument cluster illumination lamp rheostat indicates 12.6 volts with the switch in the maximum brightness position and the engine off. Which of the following statements is true?

A) The voltage available to the lamps will be 12.6 volts .
B) The voltage available to the lamps will be 0.0 volts .
C) The rheostat is operating correctly .
D) More information is required to determine if the lamps will operate correctly .

Question 15

All of the following are true concerning electrical shorts, EXCEPT:

A) A short can add a parallel leg to the circuit, which lowers the entire circuit's resistance.
B)  A short can result in a blown fuse.
C) A short decreases amperage in the circuit.
D) A short bypasses the circuit's intended path.

Question 16

How are fuses rated?

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

Question 17

Transistors:

A) Can be used to control the switching on/off of a circuit.
B) Can be used to amplify voltage.
C) Control high current with low current.
D) All of these choices.

Question 18

The horn of a vehicle equipped with a horn relay sounds weak and distorted. Which one of the following is the least likely cause of the problem?

A) High resistance in the relay load circuit .
B) High resistance in the horn ground circuit .
C) Excessive voltage drop between the relay load contact and the horn .
D) Excessive voltage drop across the relay coil winding .

Question 19

All of the statements concerning circuit components are true, EXCEPT:

A) A switch can control the on/off operation of a circuit.
B) A switch can direct the flow of current through various circuits.
C) A relay can be an SPDT-type switch.
D) A potentiometer changes voltage drop due to the function of temperature.