Welcome to ECE Board Exam Practice Quiz for Industrial Electronics. This set of practice quiz 5 will test your competence on the theories, concepts and problem solving involving Industrial Electronics. The objectives and goals of this quiz is to help engineering students familiarize concepts and theories as well as develop problem solving skills when answering questions related to the Industrial Electronics.
Industrial Electronics Test Bank
In this section are compiled practice quiz for Industrial Electronics that could be able to enhance your knowledge and skills in your preparation for the ECE Board Exam. The goal is to add thousands of questions for you to be familiarized and hopefully help you to be prepared. I am looking forward that this practice quiz will give you an additional confidence in taking your upcoming Engineering Board Exam.
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Choose the letter of the best answer in each questions.
PREVIOUS: Industrial Electronics Practice Quiz 04
A thyristor can be turned off
By reducing the anode current below the holding current value
By reversing the anode voltage
Either By reducing the anode current below the holding current value or By reversing the anode voltage
Both By reducing the anode current below the holding current value and By reversing the anode voltage
Correct!
Wrong!
The ratio of the emitter to base1 resistance to the interbase resistance of a UJT is called ________.
Aspect ratio
Current gain
Voltage gain
Intrinsic standoff ratio
Correct!
Wrong!
Referred to a bidirectional trigger diode.
Triac
UJT
BJT
Diac
Correct!
Wrong!
The total internal series resistance of the UJT.
Bulk’s resistance
Total resistance
Interbase resistance
RIS
Correct!
Wrong!
What device can be modeled by a diode and two resistors?
BJT
DIAC
SCR
UJT
Correct!
Wrong!
A device that cannot be triggered by voltage of either polarity is ________.
Diac
Triac
SCS
All of these
Correct!
Wrong!
Which device incorporates a terminal for synchronizing purposes?
Diac
Triac
SUS
SCR
Correct!
Wrong!
The term used to describe the process whereby two transistors with positive feedback are used to simulate the action of the thyristor.
Arcing
Latching
Damping
Switching
Correct!
Wrong!
What is the breakover voltage of a PUT if it is connected to a 15 V supply across the gate terminal?
10.7 V
23.7 V
15.7 V
5.3 V
Correct!
Wrong!
The term used to describe the process whereby two transistors with positive feedback are used to simulate the action of the thyristor.
Arcing
Latching
Damping
Switching
Correct!
Wrong!
The terminals of a UJT are
Gate, Anode, Cathode
Anode, Cathode
Emitter, Base
Emitter, Base1, Base2
Correct!
Wrong!
The cathode of the PUT is the counterpart of which terminal in UJT?
Anode
Base 2
Emitter
Base 1
Correct!
Wrong!
The angle of an AC supply voltage during which an SCR is “off”.
Conduction angle
Firing delay angle
Right angle
Off angle
Correct!
Wrong!
The SCS has how many gate terminals?
0
1
2
3
Correct!
Wrong!
Also known as a four-layer diode.
Diac
Shockley diode
Zener diode
FET
Correct!
Wrong!
The three terminal semiconductor device that acts in either direction.
Triac
SCR
Diac
SCS
Correct!
Wrong!
Minimum current required to keep a thyristor “on”.
Holding current
Trigger current
Supply current
Collector current
Correct!
Wrong!
Electron tube containing mercury functioning as a rectifier.
Thyratron
Ignitron
Thyrector
SCR
Correct!
Wrong!
The peak voltage of a PUT is
VD + VBB
VG + VBB
VD + VG
VBB
Correct!
Wrong!
Which of the following describes a triac?
Conducts when not triggered
Conducts when not triggered in both directions
Conducts when triggered in one direction
Conducts when triggered in both direction
Correct!
Wrong!
General term for semiconductor devices primarily used as switches.
Shockley
Thyratron
Thyristor
Relay
Correct!
Wrong!
A triac is a ________.
2 terminal switch
2 terminal bilateral switch
3 terminal unilateral switch
3 terminal bidirectional switch
Correct!
Wrong!
A thyristor is basically __________.
PNPN device
A combination of diac and triac
A set of SCRs
A set of SCR, diac and triac
Correct!
Wrong!
A series RC connected in parallel with an SCR to eliminate false triggering is the _______.
Crowbar
Snubber
Varistor
Eliminator
Correct!
Wrong!
Group of devices with 4 or more semiconductor layers.
Transistors
Diodes
Thyristors
Op-Amps
Correct!
Wrong!
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Industrial Electronics – Quiz 05
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