CRAC Class A (2025) — Questions 231–240

U0230. When a call sign, term, or necessary text must be spelled out, amateur radio operators generally use the spelling method prescribed by the ITU phonetic alphabet. The call sign VR2ZQW is spelled as:

需要拼出呼号、术语和必要的文字时，业余无线电爱好者普遍使用ITU语音字母表中规定的字母拼读法。呼号VR2ZQW可以拼读为：

Exam tips · 考试提示

VR2ZQW maps to: V=Victor, R=Romeo, 2=Two, Z=Zulu, Q=Quebec, W=Whiskey. Option A is correct; VR2 is a Hong Kong prefix. The others are unrelated call signs.

U0231. When a call sign, term, or necessary text must be spelled out, amateur radio operators generally use the spelling method prescribed by the ITU phonetic alphabet. The call sign BS7H is spelled as:

需要拼出呼号、术语和必要的文字时，业余无线电爱好者普遍使用ITU语音字母表中规定的字母拼读法。呼号BS7H可以拼读为：

Exam tips · 考试提示

BS7H maps to: B=Bravo, S=Sierra, 7=Seven, H=Hotel. Option A is correct; BS7 is the scarce Scarborough Reef (Huangyan Island) prefix, a prized DX entity. The other options spell 3DA0FZ/DL5CMP, K3TRX/VE6, and JA2IGY.

U0232. When a call sign, term, or necessary text must be spelled out, amateur radio operators generally use the spelling method prescribed by the ITU phonetic alphabet. The call sign JA2IGY is spelled as:

需要拼出呼号、术语和必要的文字时，业余无线电爱好者普遍使用ITU语音字母表中规定的字母拼读法。呼号JA2IGY可以拼读为：

Exam tips · 考试提示

JA2IGY maps to: J=Juliett, A=Alfa, 2=Two, I=India, G=Golf, Y=Yankee. Option A is correct; JA is the Japan prefix. The others spell different calls.

U0233. When a call sign, term, or necessary text must be spelled out, amateur radio operators generally use the spelling method prescribed by the ITU phonetic alphabet. The call sign K3TRX/VE6 is spelled as:

需要拼出呼号、术语和必要的文字时，业余无线电爱好者普遍使用ITU语音字母表中规定的字母拼读法。呼号K3TRX/VE6可以拼读为：

Exam tips · 考试提示

K3TRX/VE6 maps to: K=Kilo, 3=Three, T=Tango, R=Romeo, X=Xray, "/Portable"=Portable, V=Victor, E=Echo, 6=Six. Option A is correct; the "/VE6" suffix indicates portable operation in Alberta, Canada. The others spell different calls.

U0234. When a call sign, term, or necessary text must be spelled out, amateur radio operators generally use the spelling method prescribed by the ITU phonetic alphabet. The call sign 3DA0FZ/DL5CMP is spelled as:

需要拼出呼号、术语和必要的文字时，业余无线电爱好者普遍使用ITU语音字母表中规定的字母拼读法。呼号 3DA0FZ/DL5CMP可以拼读为：

Exam tips · 考试提示

3DA0FZ/DL5CMP maps to: 3=Three, D=Delta, A=Alfa, 0=Zero, F=Foxtrot, Z=Zulu, "/Portable", D=Delta, L=Lima, 5=Five, C=Charlie, M=Mike, P=Papa. Option A is correct; 3DA is Swaziland (Eswatini). The others spell different calls. CQ 呼叫与发起联络 CQ Calls and Initiating Contacts

U0235. If an amateur station is calling CQ, what does it mean?

如果一部业余电台在呼叫CQ，他的意思是：

Exam tips · 考试提示

A CQ call is a general call (CQ 呼叫) to any station, domestic or foreign, not directed at anyone in particular. Options B/C wrongly restrict it to domestic or overseas only, and D misrepresents DX etiquette — a CQ is open to all.

U0236. How does an amateur station initiate a CQ call?

一部业余电台如何发起CQ呼叫？

Exam tips · 考试提示

A proper CQ begins with "CQ CQ CQ" followed by your own call sign (and phonetics), inviting any station to answer. Option A describes this standard procedure. B confuses a CQ with a "is the frequency in use?" query; C/D add non-standard phrases ("come in"/"standing by") that do not form a correct CQ.

U0237. How do you answer a CQ call?

如何回答一个CQ呼叫？

Exam tips · 考试提示

To answer a CQ you first call the station you are answering (their call sign) and then your own call sign, so the caller knows who is replying. Option A has the correct order (other's call first, then yours). B reverses the order; C wrongly emits a CQ; D leads with a signal report before identifying, which is poor procedure.

U0238. Operator Xiaoqiang wants to call another amateur station and speak with operator Xiaoming. The correct method is:

业余电台操作员小强呼叫另一业余电台并希望与操作员小明通话的方法是：

Exam tips · 考试提示

A directed call to a specific station uses the other station's call first, then your own (A). Once the contact is established you may request to speak with the named operator. B reverses the call order; C/D use a non-standard "CQ Xiaoming" which is not proper procedure (you call a specific station by its call, not "CQ + name").

U0239. After an amateur station establishes communication, the necessary information the two sides should exchange first is:

业余电台建立通信后，双方应首先交换的必要信息是：

Exam tips · 考试提示

Once a contact is established, the first mandatory exchange is the signal report (信号报告, typically RST). Names, QTH, and equipment details may follow, but the signal report comes first as the essential on-air information.