ECE REVIEWER FREE – ELECTRONICS ENGINEERING

Preparing for the Electronics Engineer Licensure Examination (ECE) can be a daunting task, but with the right tools, it becomes more manageable and even enjoyable. One such tool is the LOOKSFAM Board Exam Tool, designed to optimize your study process and help you succeed.

Electronics Engineering

It refers to any of the over 100 different substances which have never been separated into simpler substances by chemical means and which alone or in combination constitute all matter.
electrons
element
atom
holes
Show Solution
Question:
It refers to any of the over 100 different substances which have never been separated into simpler substances by chemical means and which alone or in combination constitute all matter.
Answer:

element

Another name for Esaki diode
diac
hot-carrier diode
tunnel diode
shockley diode
Show Solution
Question:
Another name for Esaki diode
Answer:

tunnel diode

In the Cylindrical coordinate system, φ ranges from _____________.
0 to less than 4π
0 to less than π
0 to less than 3π
0 to less than 2π
Show Solution
Question:
In the Cylindrical coordinate system, φ ranges from _____________.
Answer:

0 to less than 2π

When both the emitter and collector junctions are reversed biased, the transistor is said to be at _____ region.
active
amplifying
cut-off
saturation
Show Solution
Question:
When both the emitter and collector junctions are reversed biased, the transistor is said to be at _____ region.
Answer:

cut-off

Magnetic fields of the earth as a huge magnet with north and south poles.
diamagnetic
ferromagnetic
terrestrial magnetism
terrestrial ferromagnetism
Show Solution
Question:
Magnetic fields of the earth as a huge magnet with north and south poles.
Answer:

terrestrial magnetism

What is the unit of electric current?
Watt
Ohm
Ampere
Volt
Show Solution
Question:
What is the unit of electric current?
Answer:

Ampere

Explanation:

The unit of electric current is the Ampere.

What is the largest region of a bipolar transistor?
P-region
emitter
base
collector
Show Solution
Question:
What is the largest region of a bipolar transistor?
Answer:

collector

Magnetic susceptibility is _________.
none of these
dimensionless
unitless
both (a) and (b)
Show Solution
Question:
Magnetic susceptibility is _________.
Answer:

dimensionless

_____ is a rotating vector whose projection can represent either current of voltage in an ac circuit.
velocity
polar diagram
phasor
scalar quantity
Show Solution
Question:
_____ is a rotating vector whose projection can represent either current of voltage in an ac circuit.
Answer:

phasor

What digits are used in the binary number system?
true and false
0 and 1
high and low
all of the choices
Show Solution
Question:
What digits are used in the binary number system?
Answer:

0 and 1

In resonance circuits, the inductive reactance of the circuit decreases as the frequency
is kept constant
Increases
is equal to zero
Decreases
Show Solution
Question:
In resonance circuits, the inductive reactance of the circuit decreases as the frequency
Answer:

Decreases

Explanation:

In resonance, at the resonant frequency, the inductive reactance becomes equal to capacitive reactance, causing a net reactance of zero.

When resistances are connected in parallel, the total resistance is
greater than the smallest resistance in the connection
between the smallest and greatest resistance in the connection
less than the smallest resistance in the connection
increasing or decreasing depending upon the supply voltage
Show Solution
Question:
When resistances are connected in parallel, the total resistance is
Answer:

less than the smallest resistance in the connection

A coil of inductance L has an inductive reactance of Xl in an ac circuit in which the effective current is I. The coil is made from a superconducting material. The rate at which the power is dissipated in the coil is
0
I * Xl^2
I^2 * Xl
I * Xl
Show Solution
Question:
A coil of inductance L has an inductive reactance of Xl in an ac circuit in which the effective current is I. The coil is made from a superconducting material. The rate at which the power is dissipated in the coil is
Answer:

0

An equivalent boolean equation for an exclusive NOR is
xy + xy'
x'y +xy'
xy + x'y'
xy' + x'y'
Show Solution
Question:
An equivalent boolean equation for an exclusive NOR is
Answer:

xy + x'y'

The grid to plate capacitance is least in ______ valve
pentode
tetrode
triode
diode
Show Solution
Question:
The grid to plate capacitance is least in ______ valve
Answer:

pentode

A situation in a system where it can never leave or progress to another state.
no change in state
hang-up state
rest
toggle
Show Solution
Question:
A situation in a system where it can never leave or progress to another state.
Answer:

hang-up state

A field line and equipotential surface are
None of the above
Always parallel
Inclined at any angle
Always at 90 angle
Show Solution
Question:
A field line and equipotential surface are
Answer:

Always parallel

The force which sets up or tends to set up magnetic flux in a magnetic circuit
dynamic force
magnetomotive force
potential difference
electromotive force
Show Solution
Question:
The force which sets up or tends to set up magnetic flux in a magnetic circuit
Answer:

magnetomotive force

Which of the following constants is needed to calculate the wavelength of and electron when is treated as a wave?
Boltzmann's constant
acceleration due to gravity
Faraday's constant
Planck's constant
Show Solution
Question:
Which of the following constants is needed to calculate the wavelength of and electron when is treated as a wave?
Answer:

Planck's constant

Explanation:

acceleration due to gravity"

The brush voltage drop in a dc machine is about
0.1 V
20 V
10 V
2 V
Show Solution
Question:
The brush voltage drop in a dc machine is about
Answer:

2 V

When both deflecting and controlling torque act, the pointer of an indicating instrument comes to
maximum position
3/4 position
rest
mid-position
Show Solution
Question:
When both deflecting and controlling torque act, the pointer of an indicating instrument comes to
Answer:

rest

If an emf in circuit A produces a current in circuit B, then the same emf in circuit B produces the same current in circuit A. This theorem is known as
Maximum power transfer theorem
Norton's theorem
Reciprocity theorem
Millman's theorem
Show Solution
Question:
If an emf in circuit A produces a current in circuit B, then the same emf in circuit B produces the same current in circuit A. This theorem is known as
Answer:

Reciprocity theorem

In an oscilloscope, _____ adjusts the brightness of the spot by changing the current on the control grid.
intensity control
position control
focus control
astigmatism control
Show Solution
Question:
In an oscilloscope, _____ adjusts the brightness of the spot by changing the current on the control grid.
Answer:

intensity control

The magnetic flux of 2000 lines is how many in maxwells?
8000
1000
2000
4000
Show Solution
Question:
The magnetic flux of 2000 lines is how many in maxwells?
Answer:

2000

A device that contains its own transistors, resistors, and diodes.
all of the choices
logic gates
IC
CMOS
Show Solution
Question:
A device that contains its own transistors, resistors, and diodes.
Answer:

IC

A logic gate which gives a high state output only when all its input are on a low state.
AND gate
OR gate
NOR gate
NAND gate
Show Solution
Question:
A logic gate which gives a high state output only when all its input are on a low state.
Answer:

NAND gate

Explanation:

A NAND gate produces a high output only when all its inputs are low; otherwise, it provides a low output.

What is the main disadvantage of the two-hole directional coupler?
Narrow bandwidth
All of the above
Poor directivity
High standing wave ratio
Show Solution
Question:
What is the main disadvantage of the two-hole directional coupler?
Answer:

Narrow bandwidth

A trimmer is a variable capacitor in which capacitance is varied by changing the
dielectric
plate area
distance between the plates
number of plates
Show Solution
Question:
A trimmer is a variable capacitor in which capacitance is varied by changing the
Answer:

distance between the plates

The equation that defines the ac plate resistance of a vacuum tube?
deltaEb/deltaIb
deltaEc/deltaIb
deltaIb/deltaEc
deltaEb/deltaEc
Show Solution
Question:
The equation that defines the ac plate resistance of a vacuum tube?
Answer:

deltaEb/deltaIb

How much voltage would you measure across the base-emitter junction of a silicon transistor at class A?
0 V
3.6 V
0.3 V
0.7 V
Show Solution
Question:
How much voltage would you measure across the base-emitter junction of a silicon transistor at class A?
Answer:

0.7 V

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Using LOOKSFAM for ECE Review

The LOOKSFAM Board Exam Tool is particularly beneficial for ECE candidates due to its comprehensive coverage of relevant topics and its interactive features. Here’s how you can utilize LOOKSFAM for your ECE review:

  1. Personalized Question Bank: LOOKSFAM offers a vast array of questions covering all major subjects of the ECE board exam, including:
  2. Adaptive Learning: The tool uses adaptive algorithms to tailor the questions to your learning needs. This means you’ll get more practice on areas where you need improvement, ensuring a more efficient study process.
  3. Performance Analytics: LOOKSFAM provides detailed analytics on your performance, helping you identify your strengths and weaknesses. This allows you to focus your efforts on areas that need the most attention1.
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Conclusion

The ECE board exam is a significant milestone in your engineering career. Utilizing tools like LOOKSFAM can provide a structured, efficient, and enjoyable way to prepare. With its adaptive learning algorithms, detailed analytics, and gamified approach, LOOKSFAM ensures that you’re not just studying hard, but also studying smart.

Good luck to all future electronics engineers! If you have any specific questions or need further assistance, feel free to ask.

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