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Questions and Answers
What is selective preamble?
What is selective preamble?
- A method of pre-processing data before transmission
- A process where certain parts of a document are included while others are excluded
- A type of introductory statement that is chosen based on specific criteria (correct)
- A type of lubrication used in mechanical systems
What is lubrication?
What is lubrication?
- A method of cleaning mechanical components using a special solvent
- The process of adding a sticky substance to increase friction between surfaces
- The process of adding a non-sticky substance to reduce friction between moving parts (correct)
- The act of coating a surface with oil or grease to prevent corrosion
How is selective preamble different from lubrication?
How is selective preamble different from lubrication?
- Selective preamble is a type of lubrication used in mechanical systems, while lubrication involves adding a non-sticky substance to reduce friction
- Selective preamble involves choosing an introductory statement based on specific criteria, while lubrication involves reducing friction between moving parts (correct)
- Selective preamble is the act of coating a surface with oil or grease, while lubrication involves choosing an introductory statement based on specific criteria
- Selective preamble is a process of pre-processing data, while lubrication involves cleaning mechanical components
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Study Notes
Lubrication and Selective Preamble
Lubrication
- Lubrication refers to the application of a lubricant to reduce friction between two moving surfaces, thus reducing wear and tear, heat generation, and energy consumption
- Lubricants can be in various forms, such as oils, greases, or waxes
- The primary goal of lubrication is to prevent metal-to-metal contact, which can lead to damage and overheating
Selective Preamble
- Selective preamble is a technique used in communication systems, particularly in wireless networks, to optimize transmission efficiency
- It involves transmitting a short sequence of bits, called a preamble, before the actual data transmission
- The preamble serves as a synchronization signal, allowing the receiver to synchronize with the transmitter and prepare for data reception
- Selective preamble is different from lubrication as it is a communication technique, whereas lubrication is a mechanical concept used to reduce friction and wear
Comparing Selective Preamble and Lubrication
- The main difference between selective preamble and lubrication lies in their application and purpose
- Selective preamble is used in digital communication systems, while lubrication is used in mechanical systems
- While both techniques aim to improve efficiency, selective preamble optimizes data transmission, whereas lubrication reduces friction and wear
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