MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which electronics material opposes the movement of free electrons? |
| A. | Conductor |
| B. | Insulator |
| C. | Semiconductor |
| D. | Element |
| Answer» C. Semiconductor | |
| 2. |
The digits in a measured number that are known to be correct are called |
| A. | accuracy digits |
| B. | significant digits |
| C. | error digits |
| D. | precision digits |
| Answer» C. error digits | |
| 3. |
The unit for frequency is the |
| A. | hertz |
| B. | ampere |
| C. | watt |
| D. | second |
| Answer» B. ampere | |
| 4. |
Add 21 mA and 8000 A and express the result in milliamperes. |
| A. | 21.8 mA |
| B. | 218 mA |
| C. | 29 mA |
| D. | 290 mA |
| Answer» D. 290 mA | |
| 5. |
A measure of the repeatability of a measurement of some quantity is |
| A. | error |
| B. | precision |
| C. | accuracy |
| D. | significant |
| Answer» C. accuracy | |
| 6. |
What is a characteristic of a secondary cell? |
| A. | rechargeability |
| B. | not rechargeable |
| C. | a dry cell |
| D. | non-liquid |
| Answer» B. not rechargeable | |
| 7. |
What are the basic building blocks that all matter is composed of? |
| A. | electrons, neutrons, and protons |
| B. | two protons for each neutron |
| C. | two protons for each electron |
| D. | electrons, neutrons, and charged ions |
| Answer» B. two protons for each neutron | |
| 8. |
If a fluid system is compared to an electrical system, the fluid pump will correspond to a: |
| A. | conductor |
| B. | lamp |
| C. | battery |
| D. | insulator |
| Answer» D. insulator | |
| 9. |
An element is a substance that is: |
| A. | varied throughout the entire piece |
| B. | used only in electronics |
| C. | electrically charged |
| D. | found only in its pure form |
| Answer» E. | |
| 10. |
Current is: |
| A. | the presence of a positive charge |
| B. | the abundance of electrons |
| C. | the movement of electrons |
| D. | the repulsion of electrons |
| Answer» D. the repulsion of electrons | |
| 11. |
Another name for "fundamental units" is |
| A. | base units |
| B. | atoms |
| C. | the metric system |
| D. | letter symbols |
| Answer» B. atoms | |
| 12. |
When using the terms "accuracy" and "precision" for measurements |
| A. | "precision" implies less measurement error than "accuracy" |
| B. | "accuracy" implies less measurement error than "precision" |
| C. | "precision" measures the repeatability of a measurement |
| D. | both terms mean the same thing |
| Answer» D. both terms mean the same thing | |
| 13. |
The difference between scientific and engineering notation is |
| A. | powers of ten representation |
| B. | single vs. multiple digits before decimal point |
| C. | groupings of multiples of three digits |
| D. | All of the above |
| Answer» E. | |
| 14. |
The gate-source junction of a JFET must be ________ for proper linear operation. |
| A. | forward-biased |
| B. | reverse-biased |
| C. | either forward-biased or reverse-biased |
| D. | neutral |
| Answer» C. either forward-biased or reverse-biased | |
| 15. |
Since microprocessor CPUs do not understand mnemonics as they are, they have to be converted into __________. |
| A. | hexadecimal machine code |
| B. | high-level language |
| C. | assembly language |
| D. | hexadecimal machine code and assembly language |
| Answer» B. high-level language | |
| 16. |
A program that contains nothing but strings of zeros and ones is called a(n) ________. |
| A. | machine language program |
| B. | assembly language program |
| C. | interpreted program |
| D. | binary language program |
| Answer» B. assembly language program | |
| 17. |
The register in the 8085 microprocessor that is used to keep track of the memory address of the next opcode to be run in the program is the ________. |
| A. | stack pointer |
| B. | program counter |
| C. | instruction pointer |
| D. | accumulator |
| Answer» C. instruction pointer | |
| 18. |
The first part of a machine language instruction that specifies the operation to be performed is called a(n) __________. |
| A. | mnemonic |
| B. | opcode |
| C. | interrupt |
| D. | instruction cycle |
| Answer» C. interrupt | |
| 19. |
Bleeder current is the total current left after the total divider current is subtracted from the total current into the circuit. |
| A. | True |
| B. | False |
| Answer» C. | |
| 20. |
An address bus is also called a unidirectional bus. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 21. |
To keep the number of IC pins to a minimum, the 8085 uses a multiplexed bus. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 22. |
When analyzing series parallel circuit currents, you should start with the current in the branch farthest from the source. |
| A. | True |
| B. | False |
| Answer» C. | |
| 23. |
The power dissipated by R4 is 211 mW. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 24. |
The total resistance in the circuit is 1.6 k. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 25. |
The current through R1 is 17 mA. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 26. |
Derived units are obtained from various combinations of |
| A. | electrical quantities |
| B. | fundamental units |
| C. | metric prefixes |
| D. | international standards |
| Answer» C. metric prefixes | |
| 27. |
Which of the following metric prefixes could replace 10 9? |
| A. | Nano |
| B. | Mega |
| C. | Kilo |
| D. | Micro |
| Answer» B. Mega | |
| 28. |
Scientific notation is a method |
| A. | of expressing a very large number |
| B. | of expressing a very small number |
| C. | used to make calculations with large and small numbers |
| D. | All of the above |
| Answer» E. | |
| 29. |
If you drop a 5 when rounding a number, you are using the |
| A. | round-to-even rule |
| B. | significant digit rule |
| C. | round-off rule |
| D. | retained digit rule |
| Answer» B. significant digit rule | |
| 30. |
What is the bandwidth of the circuit? |
| A. | 31.8 Hz |
| B. | 32.3 Hz |
| C. | 142 Hz |
| D. | 7.2 kHz |
| Answer» B. 32.3 Hz | |
| 31. |
In a parallel RLC circuit, which value may always be used as a vector reference? |
| A. | current |
| B. | reactance |
| C. | resistance |
| D. | voltage |
| Answer» E. | |
| 32. |
A register in the microprocessor that keeps track of the answer or results of any arithmetic or logic operation is the _________. |
| A. | stack pointer |
| B. | program counter |
| C. | instruction pointer |
| D. | accumulator |
| Answer» E. | |
| 33. |
The __________ program is used to convert mnemonic code to machine code. |
| A. | debug |
| B. | C++ |
| C. | fortran |
| D. | assembler |
| Answer» E. | |
| 34. |
A(n) ________________ is the time it takes a microprocessor to fetch and execute a complete instruction. |
| A. | instruction cycle |
| B. | machine cycle |
| C. | timing cycle |
| D. | write cycle |
| Answer» B. machine cycle | |
| 35. |
The ________ is the "brains" of every microcomputer. |
| A. | ROM |
| B. | ALU |
| C. | CPU |
| D. | MPU |
| Answer» D. MPU | |
| 36. |
The circuits in the 8085 that provide the arithmetic and logic functions are called the __________. |
| A. | CPU |
| B. | ALU |
| C. | I/O |
| D. | bus decoder |
| Answer» C. I/O | |
| 37. |
It takes two memory locations (16 bits each) to store an address in the 8085 system. |
| A. | True |
| B. | False |
| Answer» C. | |
| 38. |
A compiler is a translation program that converts high-level instructions into a set of binary instructions (machine code) for execution. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 39. |
The language understood by the microprocessor is called assembly language. |
| A. | True |
| B. | False |
| Answer» C. | |
| 40. |
A machine cycle is the time it takes a microprocessor to fetch and execute a complete instruction. |
| A. | True |
| B. | False |
| Answer» C. | |
| 41. |
In the given circuit, the Thevenin voltage equals 6 V. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 42. |
The voltage across R3 is 20 volts. |
| A. | True |
| B. | False |
| Answer» C. | |
| 43. |
The voltage across R1 is 175 volts. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 44. |
In the given circuit, the Thevenin resistance equals 800 . |
| A. | True |
| B. | False |
| Answer» C. | |
| 45. |
The voltmeter will read 18 volts. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 46. |
If you increase the rotational speed of the conductor in a basic generator, the frequency of the resulting sine wave voltage will increase. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 47. |
The magnitude of an alternation that varies from zero is called its _______. |
| A. | altitude |
| B. | polarity |
| C. | attitude |
| D. | amplitude |
| Answer» E. | |
| 48. |
What is the bandwidth in the given circuit. If the winding resistance of the coil is 12 ? |
| A. | 6.4 kHz |
| B. | 47.2 kHz |
| C. | 53.7 kHz |
| D. | 60.2 kHz |
| Answer» B. 47.2 kHz | |
| 49. |
If the bandwidth of a filter increases: |
| A. | Q decreases |
| B. | the roll-off rate increases |
| C. | the half-power frequency decreases |
| D. | the center frequency decreases |
| Answer» B. the roll-off rate increases | |
| 50. |
Series RLC impedance or voltage totals must always be calculated by |
| A. | adding values vectorially |
| B. | graphing the angles |
| C. | multiplying the values |
| D. | subtracting the values |
| Answer» B. graphing the angles | |