CRAC Class C (2025) — Questions 311–320

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U0307. When describing a signal coming from a distant place, amateurs often use the abbreviation:

形容某个信号来自远地时，爱好者们经常使用缩语：

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DX is the abbreviation for a distant station or long-distance contact. DE means "from" (used before your call sign), DR is "dear," and DSW is not a standard ham abbreviation — so A is correct.

U0308. In a CW contact, we sometimes copy the abbreviation "ES", which means:

在CW通联中，我们有时会抄到缩语"ES"，意思是：

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ES is the CW abbreviation for "and." "From" is DE, "is/are" is often omitted or written as "IS," and "please wait" is WAIT or PSE WAIT — so A is correct.

U0309. In a CW contact, we sometimes copy the abbreviation "FB", which means:

在CW通联中，我们有时会抄到缩语"FB"，意思是：

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FB stands for "Fine Business," meaning excellent or first-rate (often used for a strong signal or good operator). The other options are not the meaning of FB.

U0310. In a CW contact, we sometimes copy the abbreviation "FER", which means:

在CW通联中，我们有时会抄到缩语"FER"，意思是：

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FER is the CW abbreviation for "for." February is FEB, and foxhunt is associated with ARDF rather than FER — so A is correct.

U0311. The abbreviation for the term "frequency" is:

术语"频率"的缩语是：

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"频率" (frequency) is abbreviated FREQ. FER means "for," TUNE is the act of tuning, and FIND is "find" — so A is correct.

U0312. After establishing a CW contact, we often greet the other party while exchanging signal reports. The abbreviation for "good afternoon" is:

建立CW联络后，我们经常值交换信号报告之机向对方表示问 候。"下午好"的缩语是：

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GA is the abbreviation for "Good Afternoon" (also used as "Go Ahead" in some contexts, but as a greeting it is good afternoon). GE = good evening, GN = good night, GM = good morning — so A is correct for 下午好.

U0313. After establishing a CW contact, we often greet the other party while exchanging signal reports. The abbreviation for "good evening" is:

建立CW联络后，我们经常值交换信号报告之机向对方表示问 候。"晚上好"的缩语是：

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GE is the abbreviation for "Good Evening." GM = good morning, GN = good night, GA = good afternoon — so A is correct for 晚上好.

U0314. When ending the current contact and wishing the other party good luck and good results, amateur radio operators often use the abbreviation:

业余无线电爱好者在结束当前联络并祝愿对方好运好成绩时经 常使用缩语：

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GL stands for "Good Luck," used when wishing the other operator luck and success. GB is "Good Bye," TU is "thank you," and 73 is "best regards" — so A is correct for the good-luck wish.

U0315. The meaning of the amateur-radio abbreviation "GLD" is:

业余无线电通信缩语"GLD"的意思是：

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GLD is the abbreviation for "glad." Good luck is GL, goodbye is GB, and ground/grounding is GND — so A is correct.

U0316. After establishing a CW contact, we often greet the other party while exchanging signal reports. The abbreviation for "good morning" is:

建立CW联络后，我们经常值交换信号报告之机向对方表示问 候。"早晨好"的缩语是：

Exam tips · 考试提示

GM is the abbreviation for "Good Morning." GA = good afternoon, GL = good luck, GB = good bye — so A is correct for 早晨好.