Welcome to ECE Board Exam Practice Quiz for Industrial Electronics. This set of practice quiz 1 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.
A UJT is sometimes called a _______ diode.
a switching diode
The p-type emitter of a UJT is _______ doped.
In therapeutic radiology and in nuclear medicine, the energies of interest range from about
10 to 100 KeV
100 to 10000 KeV
10000 to 10000 KeV
1 to 10 KeV
The x-ray region of the electromagnetic spectrum has a corresponding range of wavelengths from
0.1 to 0.0001 nm
0.1 to 0.0001 pm
0.1 to 0.0001 μm
0.1 to 0.0001 mm
What are the regions corresponding to open-circuit condition for the controlled rectifier which block the flow of charge from anode to cathode?
Forward blocking regions
Reverse blocking regions
Both Forward blocking regions and Reverse blocking regions
What is a three terminal device used to control large current to a load?
PUT stands for
Programmable Unijunction Transistor
Programmable Universal Transistor
Pulse Unijunction Transistor
Pulse Universal Transistor
The UJT may be used as
a sawtooth generator
An SCR combines the feature of
a rectifier and resistance
a rectifier and capacitor
a rectifier and transistor
a rectifier and inductor
When UJTs is turned on, the resistance between emitter terminal and lower base terminal
A triac is a _______ switch.
What is a nucleonic sensing method employing usually one or more radioisotope sources and radiation detectors?
Sonic level sensing
Conductivity level sensing
Dielectric variation sensing
When the temperature increases, the inter-base resistance of a UJT
To turn on the UJT, the forward bias on emitter diode should be _______ the peak point voltage.
What is basically a two-terminal parallel-inverse combination of semiconductor layers that permits triggering in either direction?
A triac is equivalent to two SCRs
If a body is considered as a conducting sphere of 0.5m radius its capacitance to infinity is
An SCR is made of silicon and not germanium because silicon.
has low leakage current
is mechanically strong
An effect that reduces the possibility of accidental triggering of the SCS.
Which device does not have a gate terminal?
AC power in a load can be controlled by connecting
two SCRs in series
two SCRs in parallel
two SCRs in parallel opposition
two SCRs in series opposition
Power electronics deals with the control of ac power at what frequencies essentially?
Frequencies less than 10 Hz
60 Hz frequency
A triac can pass a portion of ______ half cycle through the load
both positive and negative
neither positive nor negative
How many semiconductor layers does a triac have?
To turn off the SCR, which of the following is done?