CRAC Class C (2025) — Questions 301–310
U0297. During a contact, if you want to know the other station's location, you may use the phrase:
通联时，如需了解对方电台的位置，可使用短句：
Exam tips · 考试提示
QTH? means "What is your location? / Where are you?" Asking for the other station's position is exactly QTH?. QRA asks for the station's name/call sign, QSP asks about relaying, and QSA asks about signal strength — none asks location.
U0298. When ending the current contact and exchanging good wishes, amateur radio operators often use the abbreviation:
业余无线电爱好者在结束当前联络并互致美好祝愿时经常使用 缩语：
Exam tips · 考试提示
73 is the universally used closing meaning "best regards," sent at the end of a contact with good wishes. 59 / 599 are RST signal-report numbers (strength 9, tone 9), not closings, and 99 is not a standard ham abbreviation in this context.
U0299. If, during a CW or other text-mode contact, you must ask the other party for the mailing address for their QSL card, you may send:
如在CW或其他方式的文字通联中须询问对方的QSL卡片邮寄地 址，我们可以发送：
Exam tips · 考试提示
"UR ADR?" / "UR ADDR?" means "your address?" — the correct way to request the other station's QSL mailing address. B ("MY ADDR?") asks for your own address back, C is a muddled instruction, and D asks them to send a QSL to your address — none correctly requests their address.
U0300. If you need the other party to repeat the previous operation, such as re-sending the call sign or the signal report, you may use the abbreviation:
如需对方重复上次的操作，比如重报呼号或信号报告，我们可 使用缩语：
Exam tips · 考试提示
AGN is the abbreviation for "again" — used to ask for a repeat (of the call sign, signal report, etc.). AGC is the electronics term "automatic gain control," ABT means "about," and ABV means "above" — none means repeat.
U0301. The meaning of the amateur-radio abbreviation "AHR" is:
业余无线电通信缩语"AHR"的意思是：
Exam tips · 考试提示
AHR is the CW abbreviation meaning "another" (or "other"). Antenna is abbreviated ANT, "here" is HR, and address is ADR/ADDR — so only A is correct.
U0302. The abbreviation for "amateur radio direction finding" is:
"业余无线电测向"的缩语是：
Exam tips · 考试提示
"业余无线电测向" (amateur radio direction finding) is abbreviated ARDF (per the glossary: 无线电测向运动 = radio direction-finding sport / ARDF). ATU is an antenna tuning unit, ADDR is address, and ANT is antenna — none is direction finding.
U0303. When exchanging QSL information during a CW contact, we may use the term "post office box." Its abbreviation is:
在CW联络中交换QSL信息时，我们可能用到"邮政信箱"这个术 语。其缩语是：
Exam tips · 考试提示
A post office box is abbreviated "BOX" or "P O BOX" in CW traffic. "BOX OF MAIL" is not a standard abbreviation, BURO means QSL card bureau (manager), and QTH means location — none is the post-office-box term.
U0304. The abbreviation for "QSL card bureau (manager)" is:
"QSL卡片管理局"的缩语是：
Exam tips · 考试提示
"QSL卡片管理局" (QSL card bureau / manager) is abbreviated BURO. BOX is a post office box, while ROUTER and SWITCH are networking terms unrelated to QSL handling.
U0305. In a CW contact, we sometimes copy the abbreviation "CK", which means:
在CW通联中，我们有时会抄到缩语"CK"，意思是：
Exam tips · 考试提示
CK is the CW abbreviation for "check" (as in "PSE CK" = please check). Clock is abbreviated CLK, and congratulations is usually CONGRAT or GLD/GB — so A is correct.
U0306. The abbreviation an amateur station uses when making a general call is:
业余电台发起呼叫时会使用缩语：
Exam tips · 考试提示
CQ is the universal general call meaning "calling any station." CU AGN means "see you again," TU means "thank you," and the English sentence is not a standard abbreviation — so A is correct.