What is the abbreviation for kilohertz?
The correct answer is D: kHz. The abbreviation for kilohertz is kHz (lowercase k, lowercase h, capital Z). This follows standard SI (International System of Units) conventions for unit abbreviations.
Unit abbreviations follow specific rules: the first letter is capitalized if the unit is named after a person (like Hertz, named after Heinrich Hertz), prefixes use standard capitalization (k for kilo is lowercase, M for mega is capital), and the 'z' in hertz is lowercase. kHz is the correct, standardized abbreviation. Common mistakes include 'KHZ' (all caps), 'khz' (all lowercase), or 'khZ' (wrong capitalization).
Exam Tip
Kilohertz abbreviation = kHz. Remember: The correct abbreviation is kHz (lowercase k, capital H, lowercase z). Hertz is named after a person, so H is capitalized.
Memory Aid
"**k**Hz = **k**ilo **H**ertz (think 'kHz = kH' = kilo Hertz, lowercase k, capital H, lowercase z)"
Real-World Application
When you see '146.52 MHz' or '28.400 kHz' in frequency specifications, the 'kHz' is the abbreviation for kilohertz. This is the standardized, correct abbreviation. Using the wrong abbreviation (like 'KHZ' or 'khz') might cause confusion or be incorrect in technical documentation.
FCC Part 97.3Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. 'KHZ' has all capital letters. The 'k' for kilo should be lowercase, and 'z' should be lowercase. Only 'H' should be capital (Hertz is named after a person).
Option B: Incorrect. 'khz' has all lowercase letters. The 'H' should be capital because Hertz is named after a person.
Option C: Incorrect. 'khZ' has lowercase 'k' and 'h', but capital 'Z'. The 'z' should be lowercase, and 'H' should be capital.
题目解析
The correct answer is D: kHz. The abbreviation for kilohertz is kHz (lowercase k, lowercase h, capital Z). This follows standard SI (International System of Units) conventions for unit abbreviations. Unit abbreviations follow specific rules: the first letter is capitalized if the unit is named after a person (like Hertz, named after Heinrich Hertz), prefixes use standard capitalization (k for kilo is lowercase, M for mega is capital), and the 'z' in hertz is lowercase. kHz is the correct, standardized abbreviation. Common mistakes include 'KHZ' (all caps), 'khz' (all lowercase), or 'khZ' (wrong capitalization).
考试技巧
Kilohertz abbreviation = kHz. Remember: The correct abbreviation is kHz (lowercase k, capital H, lowercase z). Hertz is named after a person, so H is capitalized.
记忆口诀
**k**Hz = **k**ilo **H**ertz (think 'kHz = kH' = kilo Hertz, lowercase k, capital H, lowercase z)
实际应用示例
When you see '146.52 MHz' or '28.400 kHz' in frequency specifications, the 'kHz' is the abbreviation for kilohertz. This is the standardized, correct abbreviation. Using the wrong abbreviation (like 'KHZ' or 'khz') might cause confusion or be incorrect in technical documentation.
错误选项分析
Option A: Incorrect. 'KHZ' has all capital letters. The 'k' for kilo should be lowercase, and 'z' should be lowercase. Only 'H' should be capital (Hertz is named after a person). Option B: Incorrect. 'khz' has all lowercase letters. The 'H' should be capital because Hertz is named after a person. Option C: Incorrect. 'khZ' has lowercase 'k' and 'h', but capital 'Z'. The 'z' should be lowercase, and 'H' should be capital.
知识点
Kilohertz, kHz, Unit abbreviations, SI units
Verified Content
Question from official FCC Technician Class question pool. Explanation reviewed by licensed amateur radio operators.