CRAC Class B (2025) — Questions 231–240

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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.

U0676. Amateur radio operators sometimes use well-known alternative phonetic alphabets to spell out call signs, names, and words during contacts; these are common in DX contacts. "Japan America Two Italy Germany Yokohama" is:

业余无线电爱好者有时会在通联中使用广为流传的另类字母解 释法来拼读呼号、名字和文字。这些常见于DX通联。Japan America Two Italy Germany Yokohama为：

Exam tips · 考试提示

This is a playful "alternative" phonetic alphabet where each word stands for a letter or digit: Japan=J, America=A, Two=2, Italy=I, Germany=G, Yokohama=Y, giving JA2IGY (A). The other options encode different word strings.

U0677. Amateur radio operators sometimes use well-known alternative phonetic alphabets to spell out call signs, names, and words during contacts; these are common in DX contacts. "Florida Five England Queen United" is:

业余无线电爱好者有时会在通联中使用广为流传的另类字母解 释法来拼读呼号、名字和文字。这些常见于DX通联。Florida Five England Queen United为：

Exam tips · 考试提示

Using the same novelty phonetic alphabet: Florida=F, Five=5, England=E, Queen=Q, United=U, giving F5EQU (A). The other strings come from different word sets.

U0678. Amateur radio operators sometimes use well-known alternative phonetic alphabets to spell out call signs, names, and words during contacts; these are common in DX contacts. "Washington Honolulu Eight Zanzibar Denmark Portugal" is:

业余无线电爱好者有时会在通联中使用广为流传的另类字母解 释法来拼读呼号、名字和文字。这些常见于DX通联。 Washington Honolulu Eight Zanzibar Denmark Portugal为：

Exam tips · 考试提示

Washington=W, Honolulu=H, Eight=8, Zanzibar=Z, Denmark=D, Portugal=P, giving WH8ZDP (A). The other options encode different word sets.

U0679. Amateur radio operators sometimes use well-known alternative phonetic alphabets to spell out call signs, names, and words during contacts; these are common in DX contacts. "Sugar Five Three Mexico Norway Ontario" is:

业余无线电爱好者有时会在通联中使用广为流传的另类字母解 释法来拼读呼号、名字和文字。这些常见于DX通联。Sugar Five Three Mexico Norway Ontario为：

Exam tips · 考试提示

Sugar=S, Five=5, Three=3, Mexico=M, Norway=N, Ontario=O, giving S53MNO (A). The other options encode different word sets. 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").