CRAC Class B (2025) — Questions 311–320

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U0722. During a contact, if you want to find out whether your signal is experiencing atmospheric (static) interference, you can use the short phrase:

通联时，如需了解自己的信号是否遭遇了天电干扰，可使用短 句：

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QRN? asks "are you troubled by static (atmospheric interference)?" — natural/interference from lightning and nature (A). QRM? is man-made interference; QRP? asks to reduce power; QRQ? asks to send faster.

U0723. During a contact, if you want to tell the other station that its signal is experiencing atmospheric (static) interference, you can send:

在通联中，如需告诉对方其信号遇到了天电干扰，我们可以 发：

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As a statement, QRN means "you are being troubled by static (atmospheric interference)" (A). QRM would be man-made interference; QRP means "reduce power"; QRQ means "send faster".

U0724. During a CW contact, the other station sometimes sends the symbol "di-dah di-di-dit". It looks like "AS" sent together, and when we copy it we put a bar over the "AS". The meaning of this symbol is:

CW联络时，对方有时会发来符号“滴答滴滴滴”。这像是将 “AS”连发在了一起，而我们抄写时会在“AS”上面加个横 线。该符号的含义是：

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The prosign "AS" (·/— ··· or di-dah di-di-dit) means "wait" / "please stand by" (A). It is a procedural sign, not a word. B ("Asia") is a different word; C and D are invented meanings.

U0725. During a contact, if you receive the short phrase "PSE QSL VIA BURO" sent by the other station, then the "QSL" in it means:

通联时，如收到对方发送的短句“PSE QSL VIA BURO”，则 其中的“QSL”意指：

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"PSE QSL VIA BURO" means "please send me a QSL card through the bureau" — here QSL refers to the QSL card (A), and BURO is the QSL bureau. It is a request for a paper card via the bureau system, not an acknowledgment of the BURO message itself nor a vague confirmation.

U0726. When ending the current contact and bidding each other farewell, amateur radio operators often use the abbreviations:

业余无线电爱好者在结束当前联络并互致再见时经常使用缩 语：

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CU = "see you", CU AGN = "see you again", GB = "goodbye" — all farewell abbreviations (A). B (GM/GA/GE/GN/GX) are time- of-day greetings (good morning/afternoon/evening/night); C (TU/TKS/TNX) are thanks; D is a free-text phrase, not the standard sign-off set.

U0727. When ending a CW session, we often hear the other station send the symbol "di-di-di dah-di-dah". It looks like "SK" sent together, and when we copy it we put a bar over the "SK". The meaning of this symbol is:

在结束CW会话之时，我们时常听到对方发来符号“滴滴滴答滴 答”。这像是将“SK”连发在了一起，而我们抄写时会在 “SK”上面加个横线。该符号的意思是：

Exam tips · 考试提示

The prosign "SK" (···—· / di-di-di dah-di-dah) means "end of contact" / "silent key" — it closes the QSO (A). It is a procedural sign distinct from the farewell abbreviations, not "happy", "thanks", or "see you next time". Q 简语与常用缩语 Q-Codes and Common Abbreviations

U0267. During QRP operation, if the other station reports your signal is weak, you might ask whether you should increase power. You can send:

QRP操作时如果对方反映信号不好，我们可能会追问是否需要 增加功率。此时可发送：

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QRO means "shall I increase power?" / "I am increasing power." Asking whether to raise power uses QRO? (A). QSO = a contact; QRP = reduce power / low-power operation; QRS = send slower. So only A fits "increase power".

U0268. During a contact, if you believe QRP operation is enough to ensure reliable communication, you can negotiate with the other station to lower power. The phrase is:

通联时，如认为QRP操作足以保证可靠联络，则可与对方协商 降低功率。短句为：

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QRP means "shall I reduce power?" / "I am reducing power." Proposing to lower power uses QRP? (A). QRO = increase; QRU = I have nothing for you; QRT = I am closing down. So only A means "reduce power".

U0269. When amateur stations conduct communication research or chase awards at power below 5 W, they often append the operating attribute "QRP" to the call sign, e.g., BI9XYZ/QRP. The Q-code "QRP" means:

业余电台以低于5瓦的功率开展通信研究或追逐奖状时，常在呼 号之后附加操作属性“QRP”。例如：BI9XYZ/QRP。Q简语 “QRP”表示：

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QRP means "I am reducing / have reduced transmitter power" (typically low-power operation, generally ≤5 W). Option A captures the meaning. B over-specifies "to 5 W" (QRP is the state of reduced power, not a fixed number); C (send slower) is QRS; D is a distortion.

U0270. During a contact, if you want the other station to increase its sending speed, you can send:

通联时，如果希望对方加快发报速度，我们可以发送：

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QRQ means "please send faster" (PSE = please). So "PSE QRQ" requests higher speed (A). QRS = send slower; QRT = closing down; QTR = time. Only A means faster.