General Awareness: Technology And You Set 2
Questions and Answers
- 1.
What frequency range is the High Frequency band?
- A.
100 kHz
- B.
1 GHz
- C.
30 to 300 MHz
- D.
3 to 30 MHz
Correct Answer
D. 3 to 30 MHzExplanation
The High Frequency band is typically defined as the range of frequencies between 3 to 30 MHz. This range is commonly used for various applications such as shortwave broadcasting, amateur radio, and aviation communications. Frequencies within this range are able to travel long distances by reflecting off the ionosphere, making it suitable for long-range communication.Rate this question:
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- 2.
The first step to getting output from a laser is to excite an active medium. What is this process called?
- A.
Pumping
- B.
Exciting
- C.
Priming
- D.
Raising
Correct Answer
A. PumpingExplanation
The process of exciting an active medium to generate output from a laser is called pumping. This involves supplying energy to the active medium, such as through electrical current or light, to raise the atoms or molecules to a higher energy state. This excitation creates a population inversion, where more particles are in the higher energy state than the lower energy state. When these excited particles return to their lower energy state, they release photons, resulting in laser emission.Rate this question:
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- 3.
What is the relationship between resistivity r and conductivity s?
- A.
R = s2
- B.
R = s
- C.
R > s
- D.
R = 1/s
Correct Answer
D. R = 1/sExplanation
The relationship between resistivity (R) and conductivity (s) is that they are reciprocals of each other. This means that if the resistivity is R, then the conductivity is 1/R, or vice versa. Therefore, the correct answer is R = 1/s.Rate this question:
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- 4.
Which motor is NOT suitable for use as a DC machine?
- A.
Permanent magnet motor
- B.
Series motor
- C.
Squirrel cage motor
- D.
Synchronous motor
Correct Answer
C. Squirrel cage motorExplanation
A squirrel cage motor is not suitable for use as a DC machine because it is an asynchronous motor that operates on AC power. It does not have the necessary components, such as commutators and brushes, to convert AC power to DC power. Permanent magnet motor, series motor, and synchronous motor are all suitable for use as DC machines as they can convert AC power to DC power effectively.Rate this question:
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- 5.
A given signal's second harmonic is twice the given signal's __________ frequency...?
- A.
Fourier
- B.
Foundation
- C.
Fundamental
- D.
Field
Correct Answer
C. FundamentalExplanation
The second harmonic of a signal is the frequency that is twice the frequency of the given signal. In other words, it is the frequency component that occurs at double the frequency of the original signal. Therefore, the correct answer is "Fundamental" because the second harmonic is twice the frequency of the fundamental frequency of the given signal.Rate this question:
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- 6.
In which year was MIDI(dress) introduced?
- A.
1987
- B.
1983
- C.
1973
- D.
1977
Correct Answer
B. 1983Explanation
MIDI (Musical Instrument Digital Interface) was introduced in 1983. This technology revolutionized the music industry by allowing electronic musical instruments, computers, and other devices to communicate and synchronize with each other. It standardized the way musical information was transmitted, enabling musicians to control and synchronize multiple instruments and devices easily. MIDI has become a fundamental part of music production and performance, and its introduction in 1983 marked a significant milestone in the evolution of electronic music.Rate this question:
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- 7.
What does the term PLC stand for?
- A.
Programmable Lift Computer
- B.
Program List Control
- C.
Programmable Logic Controller
- D.
Piezo Lamp Connector
Correct Answer
C. Programmable Logic ControllerExplanation
PLC stands for Programmable Logic Controller. A Programmable Logic Controller is a digital computer used for automation of electromechanical processes. It is designed to control machinery and perform specific tasks based on the input received. PLCs are widely used in industries to monitor and control various processes, such as manufacturing, assembly lines, and power plants. They are programmable and can be easily reconfigured or modified to suit different requirements, making them highly versatile and efficient in industrial automation.Rate this question:
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- 8.
When measuring the characteristics of a small-signal amplifier, say for a radio receiver, one might be concerned with its "Noise..."?
- A.
Fundamental
- B.
Fall
- C.
Force
- D.
Figure
Correct Answer
D. FigureExplanation
When measuring the characteristics of a small-signal amplifier, one might be concerned with its "Noise Figure." The noise figure is a measure of how much additional noise the amplifier adds to the signal. A lower noise figure indicates that the amplifier is better at preserving the original signal and minimizing the addition of noise. Therefore, when evaluating the performance of a small-signal amplifier for a radio receiver, the figure of noise is an important parameter to consider.Rate this question:
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- 9.
'DB' computer abbreviation usually means ?
- A.
Database
- B.
Double Byte
- C.
Data Block
- D.
Driver Boot
Correct Answer
A. DatabaseExplanation
The computer abbreviation 'DB' usually stands for Database. A database is a structured collection of data that is stored and organized in a way that allows for efficient retrieval, management, and manipulation of the data. Databases are commonly used in various applications and systems to store and manage large amounts of structured data.Rate this question:
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- 10.
'.INI' extension refers usually to what kind of file?
- A.
Image file
- B.
System file
- C.
Hypertext related file
- D.
Image Color Matching Profile file
Correct Answer
B. System fileExplanation
The '.INI' extension typically refers to a system file. INI files are commonly used in Windows operating systems to store configuration settings for various applications and system components. These files contain plain text information that can be easily read and modified by users or applications. System files are essential for the proper functioning of the operating system and its associated software.Rate this question:
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- 11.
The sampling rate, (how many samples per second are stored) for a CD is...?
- A.
48.4 kHz
- B.
22,050 Hz
- C.
44.1 kHz
- D.
48 kHz
Correct Answer
C. 44.1 kHzExplanation
The correct answer is 44.1 kHz. This is the standard sampling rate for audio CDs. It means that 44,100 samples are taken per second to capture the audio signal. This sampling rate is chosen because it is capable of reproducing the full range of human hearing, which is typically up to 20 kHz.Rate this question:
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- 12.
Who created Pretty Good Privacy (PGP)?
- A.
Paul Zimmerman
- B.
Tim Berners-Lee
- C.
Marc Andreessen
- D.
Ken Thompson
Correct Answer
A. Paul ZimmermanExplanation
Paul Zimmerman is the correct answer because he is the creator of Pretty Good Privacy (PGP). PGP is a data encryption and decryption computer program that provides cryptographic privacy and authentication for data communication. It was developed in 1991 by Zimmerman and is widely used for secure communication and data protection.Rate this question:
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- 13.
What do we call a network whose elements may be separated by some distance? It usually involves two or more small networks and dedicated high-speed telephone lines.
- A.
URL (Universal Resource Locator)
- B.
LAN (Local Area Network)
- C.
WAN (Wide Area Network)
- D.
World Wide Web
Correct Answer
C. WAN (Wide Area Network)Explanation
A network whose elements may be separated by some distance and usually involves two or more small networks and dedicated high-speed telephone lines is called a WAN (Wide Area Network).Rate this question:
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- 14.
After the first photons of light are produced, which process is responsible for amplification of the light?
- A.
Blackbody radiation
- B.
Stimulated emission
- C.
Planck’s radiation
- D.
Einstein oscillation
Correct Answer
B. Stimulated emissionExplanation
Stimulated emission is the process responsible for amplification of light after the first photons are produced. In this process, an incoming photon stimulates an excited atom or molecule to emit another photon that is in phase and has the same energy and direction as the incoming photon. This leads to the amplification of the light signal, as more and more photons are produced through stimulated emission.Rate this question:
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- 15.
Which is NOT an acceptable method of distributing small power outlets throughout an open plan office area?
- A.
Power Poles
- B.
Power Skirting
- C.
Flush Floor Ducting
- D.
Extension Cords
Correct Answer
D. Extension CordsExplanation
Extension cords are not an acceptable method of distributing small power outlets throughout an open plan office area. Extension cords are temporary solutions and can pose safety hazards such as tripping hazards and overloading electrical circuits. They are not designed for permanent use and should not be used as a long-term solution for distributing power in an office area. It is recommended to use more permanent and safer methods such as power poles, power skirting, or flush floor ducting for this purpose.Rate this question:
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