Deck 6: Basic Electronics

Question 1

The addition of impurities to silicon to form a semiconductor is called doping.

Answer 1

True

Question 2

Rectifier diodes permit electric current to flow in one direction and block current flow in the opposite direction.

Answer 2

True

Question 3

A technician measures approximately 0.7V across a diode in a 12V electric circuit. This indicates the diode is reverse biased.

Answer 3

False

Question 4

A wiring schematic indicates a diode is connected in parallel with an A/C clutch coil. Such a diode would likely be used as a suppression device.

Question 5

An LED typically requires a series resistor to limit the current flow through the LED.

Question 6

A bipolar transistor is a current-controlled device and a FET is a voltage-controlled device.

Question 7

A MOSFET is a type of bipolar transistor.

Question 8

Electronic components will typically recover from damage caused by improper troubleshooting techniques after disconnecting and reconnecting electric power to the device.

Question 9

Resistors are typically made from what material?

A) Silicon
B) Copper
C) Lead dioxide
D) Carbon

Question 10

Technician A says that a 1k ohm 2-watt resistor and a 1k ohm 1/2 watt resistor both have the same value of resistance. Technician B says that a potentiometer has two electrical terminals. Who is correct?

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

Question 11

Resistors are used for three main purposes in an electrical circuit. Resistors limit the current flow through a circuit, divide voltage, and _____?

A) store energy
B) give off heat
C) permit current to flow in only one direction
D) amplify voltage

Question 12

Technician A says that a zener diode emits visible light. Technician B says that a forward-biased diode describes a diode that is blocking the flow of electric current. Who is correct?

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

Question 13

Transistors are used to amplify low-level signals into higher-level signals and to ____?

A) divide voltage
B) permit current to only flow in one direction
C) control air brakes
D) act as an electronic switch similar to a relay

Question 14

Technician A says that a low-side driver provides a path to ground. Technician B says that a high-side driver provides a positive voltage. Who is correct?

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

Question 15

Which of the following is a true statement?

A) A rheostat is a two-terminal variable resistor.
B) A rheostat is often used to control the amount of current flowing in a circuit.
C) A potentiometer is typically used to divide voltage.
D) All of the above are true statements.

Question 16

A technician is testing a diode using a DMM in the diode test mode. She measures 0.7V when the diode is forward biased and the DMM indicates OL when the diode is reverse biased. What do these test results indicate?

A) The results indicate the diode is defective because of the OL indication when the diode is reverse biased.
B) The results indicate that this is definitely not a zener diode.
C) The results indicate she is not testing the diode correctly.
D) The results indicate the diode is likely functioning correctly.

Question 17

Technician A says that the stripe on a diode indicates the cathode end of the diode. Technician B says that the arrow on the schematic symbol for a diode indicates the direction of conventional current flow to forward-bias the diode. Who is correct?

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

Question 18

A "_____ bond describes the sharing of electrons between atoms.

A) free-electron
B) ionic
C) semi-conductor
D) covalent

Question 19

The terminals of a zener diode include the anode, the cathode, and _____.

A) the gate
B) the base
C) the source
D) that is all. A zener diode would typically only have two terminals.

Question 20

The three terminals of a bipolar transistor are the emitter, the base, and the _______?

A) source
B) gate
C) collector
D) drain