 # Electronics Engineering Mastery Test 6: ECE Pre-Board

(Last Updated On: September 25, 2018) This is 100 items Practice Examinations set 6 in Electronics Engineering composed of previous Board Exams Questions. Read each questions and choices carefully! Choose the best answer. In the actual board, you have to answer 100 items in Electronics Engineering within 5 hours. You have to get at least 70% to pass the subject. Electronics Engineering is 30% of the total 100% Board Rating along with Mathematics (20%), General Engineering and Applied Sciences (20%) and Electronics Systems and Technology (30%).

### Start the Test Yourself Exam 6

Choose the letter of the best answer in each questions.

1. What is anything that has weight had occupied space which may be a solid, liquid or gas?

• A. Alloy
• B. Matter
• C. Amalgam
• D. Compound
View Answer:

Answer: Option B

Solution:

2. What is the capacitive reactance of a 33 microfarad capacitor at 6500 Hz?

• A. 0.74 ohms
• B. 7.4 ohms
• C. 96 ohms
• D. 1122 ohms
View Answer:

Answer: Option A

Solution:

3. Which of the following materials refers to as a recipient of impurity element?

• A. Phosphorous
• B. Antimony
• C. Arsenic
• D. Gallium
View Answer:

Answer: Option D

Solution:

4. In the operation of dry cells, we normally refer to the supply of current to load resistance where its current neutralizes the separated charges at the electrodes.

• A. Aligning the cells
• B. Charging the cells
• C. Discharging the cells
• D. Polarizing the cells
View Answer:

Answer: Option C

Solution:

5. They are special class C amplifiers that are biased at 3 to 10 times the normal cutoff and used to generate frequency that is a harmonic of a lower frequency.

• A. Frequency generators
• B. Frequency stabilizers
• C. Frequency multipliers
• D. Frequency amplifiers
View Answer:

Answer: Option C

Solution:

6. In voltmeter, the purpose of series resistor is to _________.

• A. increase speed of meter movement
• B. decrease the current range
• C. decrease the voltage range
• D. increase the voltage range
View Answer:

Answer: Option D

Solution:

7. ICs that are combinations of monolithic and film of discrete components or any combinations thereof to allow flexibility in circuits.

• A. Hybrid IC
• B. Micro IC
• C. Mixed IC
• D. Combined IC
View Answer:

Answer: Option A

Solution:

8. An instrument used to record the electric potentials associated with the electrical currents that traverse the heart.

• A. Electrograph
• B. Electrolysis
• C. Electroencephalograph
• D. Electrocardiograph
View Answer:

Answer: Option D

Solution:

9. SUBRACT: 11001(subscript 2) – 1001(subscript 2).

• A. 10001
• B. 10100
• C. 10010
• D. 10000
View Answer:

Answer: Option D

Solution:

10. What is the name of an electrode found in a pentode but not in a tetrode?

• A. Control grid
• B. Screen grid
• C. Signal grid
• D. Suppressor grid
View Answer:

Answer: Option D

Solution:

11. What is the magnetic equivalent to electrical voltage?

• A. Flux
• B. Reluctance
• C. Magnetomotive force
• D. Magnetic field
View Answer:

Answer: Option C

Solution:

12. The effect of 60 Hz AC 40-100 mA or DC 160-300 mA on the human body.

• A. Mascular failure
• B. Refex action
• C. Surprise
• D. Respiratory failure
View Answer:

Answer: Option D

Solution:

13. How many junctions are there in a semiconductor diode?

• A. Two
• B. One
• C. None
• D. Four
View Answer:

Answer: Option B

Solution:

14. A transformer composed of two or more coils which are wound around a non metallic core.

• A. Metallic core transformer
• B. Free core transformer
• C. Iron core transformer
• D. Air core transformer
View Answer:

Answer: Option D

Solution:

15. How many half wave rectifiers will make up a half wave voltage doubler?

• A. 6
• B. 2
• C. 8
• D. 4
View Answer:

Answer: Option B

Solution:

16. What materials are meter pointers normally made?

• A. Copper
• B. Iron
• C. Zinc
• D. Aluminum
View Answer:

Answer: Option D

Solution:

17. In NPN transistor, when emitter junction is forward biased and collector junction is reversed biased, the transistor will operate in

• A. cut off region
• B. saturation region
• C. active region
• D. inverted region
View Answer:

Answer: Option C

Solution:

18. An instrument used to detect presence, sign and in some configurations the magnitude of an electric charge by the mutual attraction or repulsion of metal foils or pith balls.

• A. Electroscope
• B. Electrometer
• C. Electron microscope
• D. Electrograph
View Answer:

Answer: Option A

Solution:

19. What is the term we use to refer to the instructions we give a computer to perform?

• A. Processor
• B. Program
• C. Hardware
• D. Software
View Answer:

Answer: Option B

Solution:

20. The total number of magnetic lines force leaving or entering the pole of a magnet.

• A. Potential field
• B. Magnetic field
• C. Magnetic space
• D. Magnetic flux
View Answer:

Answer: Option D

Solution:

21. How do you call an eight element vacuum tube?

• A. Pentode
• B. Hexode
• C. Octode
• D. Septode
View Answer:

Answer: Option C

Solution:

22. What is the lightest kind of atom or element?

• A. Oxygen
• B. Hydrogen
• C. Titanium
• D. Helium
View Answer:

Answer: Option B

Solution:

23. Materials that can be easily magnetized in both direction

• A. High hysteresis magnetic materials
• B. Low hysteresis magnetic materials
• C. Hard magnetic materials
• D. Soft magnetic materials
View Answer:

Answer: Option D

Solution:

24. Which of the following statement is true in semiconductor application?

• A. An ohmmeter test across a diode shows high resistance in both polarity of test
• B. An ohmmeter test across the base-collector of a transistor should show high resistance in the opposite polarity
• C. An ohmmeter test across the base- collector of a transistor should show low resistance for both polarity
• D. Triac is one direction semiconductor
View Answer:

Answer: Option B

Solution:

25. A motor- generator unit in which is built to convert low voltage direct current to high voltage direct current, both use the same field windings and share armature.

• A. Vibrator
• B. Dynamotor
• C. Gen- set
• D. Electric generator
View Answer:

Answer: Option B

Solution:

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