Deck 21: Basic Industrial Electronics

Question 1

A diac does not conduct until a threshold ____ is reached.

A) inductance
B) resistance
C) current
D) voltage

Answer 1

D

Question 2

When DC voltages must have little or no ripple, a filter is used to smooth out the pulse.

Answer 2

True

Question 3

An SCR looks very similar to a diode except that there is an extra ____.

A) terminal
B) junction
C) anode
D) cathode

Answer 3

A

Question 4

It is not unusual for transistor amplifiers to have a gain of ____.

A) 10
B) 50
C) several hundred
D) several thousand

Question 5

A diode is a three-terminal device.

Question 6

An impurity that causes a shortage of electrons is called a(n) ____.

A) doper
B) receiver
C) acceptor
D) contributor

Question 7

A diode will only conduct current when forward biased.

Question 8

A full-wave rectifier has a DC output voltage during one-half of the AC input voltage.

Question 9

The AC component that causes the pulsating voltage is called the ____.

A) vibration
B) oscillator
C) wave
D) ripple

Question 10

Conversion of AC input voltage into a DC output voltage is called ____.

A) rectification
B) rippling
C) impedance
D) amplification

Question 11

An N-type material contains free electrons.

Question 12

The bipolar junction transistor (BJT) is a(n) ____ device.

A) one-phase
B) two-transistor
C) three-terminal
D) four-switch

Question 13

A ____ changes its internal resistance when its surface is struck by light.

A) photoconductive cell
B) light-emitting diode
C) zener diode
D) bipolar junction transistor

Question 14

Adding an impurity such as arsenic or indium causes a semiconductor to take on very different characteristics. This process is called ____.

A) bonding
B) doping
C) refining
D) amalgamating

Question 15

____ diodes are used to provide voltage regulation.

A) Regulating
B) Zener
C) Photo
D) Light-emitting