CRAC Class C (2025) — Questions 271–280
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：
Exam tips · 考试提示
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：
Exam tips · 考试提示
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：
Exam tips · 考试提示
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：
Exam tips · 考试提示
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.
U0271. During a contact, if the other station asks you to increase sending speed, you can confirm by asking back. You can send:
通联时，如果对方要求加快发报速度，我们可以通过反问来确 认。此时可以发送：
Exam tips · 考试提示
To confirm "shall I send faster?", you echo the question as QRQ? (A). QRS? would ask "shall I send slower?"; QRT? "shall I close down?"; QTR? "what is the time?" — none confirm speeding up.
U0272. During a contact, if you want the other station to reduce its sending speed, you can send:
通联时，如果希望对方放慢发报速度，我们可以发送：
Exam tips · 考试提示
QRS means "please send more slowly". So "PSE QRS" requests slower sending (A). QRQ = faster; QSY = change frequency; QSL = acknowledge/confirm. Only A means slower.
U0273. During a contact, if the other station asks you to reduce sending speed, you can confirm by asking back. You can send:
通联时，如果对方要求放慢发报速度，我们可以通过反问来确 认。此时可以发送：
Exam tips · 考试提示
To confirm "shall I send slower?", echo QRS? (A). QRQ? would ask faster; QSY? asks about changing frequency; QSL? asks for confirmation — none confirm slowing down.
U0274. When ending the day's operating activity, an amateur station often sends the Q-code "QRT". Its meaning is:
结束当天的通联活动时，业余电台常会发送Q简语“QRT”。 其含义为：
Exam tips · 考试提示
QRT means "I am closing down / ceasing operation" — i.e., signing off the station (A). B is QSY (change frequency); C/D are not standard Q-code meanings. Only A is correct.
U0275. Before ending a contact, we may ask the other party whether there is any further message to convey. At this point we may send:
在结束联络之前，我们可以询问对方是否还有消息要传达。此 时可以发送：
Exam tips · 考试提示
QRU? is the Q-code meaning "Have you anything to send me? / I have no messages (nothing to send)." Asking before closing a contact whether the other party still has a message to convey is exactly the use of QRU?. QRL? asks whether the station is busy; QRB? asks about distance; QRQ? asks the other to send faster — none of these fit "do you have more to say."
U0276. When ending a contact, we can tell the other party that there is nothing further here. At this point we may send:
结束联络时，我们可以告诉对方这里已无事。此时可以发送：
Exam tips · 考试提示
QRU (statement form) means "I have no messages / nothing to send," i.e., there is nothing further here. Telling the other station "nothing here" at the close of a contact is the canonical use of QRU. QRL means busy, QRM means interference (to me), and QRN means atmospheric noise — none convey "nothing to send."