CRAC Class C (2025) — Questions 251–260

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U0708. In CW contests or DX contacts, we thank the other party for the contact. We can send:

在CW竞赛或DX通联中，我们会感谢对方积极参与了联络。我 们可以发：

Exam tips · 考试提示

In fast contest/DX CW the brief thanks is "TU" (= thank you) (A). "FB" = fine business (good), "NICE"/"FINE" are not the standard acknowledgment token in this high-speed context.

U0709. During a CW contact, Xiaoming wants to introduce his name. He can send:

CW通联时，小明拟介绍自己的名字。他可以发：

Exam tips · 考试提示

NAME is the CW abbreviation for "name", so "NAME XIAOMING" gives your name (A). MODE = mode, RIG = equipment, ANT = antenna — none introduces a person's name.

U0710. In CW contacts, the abbreviation "OP" means the operator's name. When Xiaoming introduces his name to the other station he can send:

在CW通联中，缩语"OP"表示操作员的名字。小明向对方介绍 自己的名字时可以发：

Exam tips · 考试提示

"OP" = operator, so "OP XIAOMING" gives the operator's name (A). "B4" = before, "NICE" = nice, "DR" = dear (used before a name as a title) — none simply states your own name as OP does.

U0711. In a CW contact, if you know the other operator's name (or they have introduced themselves), you may prefix it with "dear/esteemed" when addressing them. Suppose the other station is operated by Zork; you can send:

在CW通联中，如果已知对方操作员的名字，或是对方已做自我 介绍，则我们在称呼其名时可以冠以"尊敬的"。假设对方电台 由Zork操作，我们可以发：

Exam tips · 考试提示

"DR" = dear (a courteous title), so "DR ZORK" addresses the operator respectfully (A). HR = here, NR = number, UR = your — none serves as the "dear" title.

U0712. In contacts, amateurs often use words like "receiver", "transmitter", "transceiver", and "equipment" to describe their station's gear. The abbreviations for these can be:

在通联中，业余无线电爱好者经常使用诸如"接收机"、"发射 机"、"收发信机"和"设备"等词汇来描述己方电台的装置情况。 这些词汇的缩语可以是：

Exam tips · 考试提示

Receiver = RCVR/RX, transmitter = XMTR/TX, transceiver = XCVR/TXRX, and "RIG" = the station/equipment (A). B (RPT=repeater, SASE, RPRT=report, WKD=worked), C and D (RST=report, SIGS=signals) are unrelated abbreviations.

U0713. In a CW contact, Xiaoming wants to tell the other station his equipment is an X6200. He can send:

在CW通联中，小明拟向对方介绍说自己的设备是X6200。他 可以发：

Exam tips · 考试提示

"RIG" means the station/equipment, so "RIG X6200" states the transceiver model (A). REG WID = "regards with"; EQP OF is not standard; OP = operator (a person), not a device.

U0714. In amateur radio abbreviations, "PWR" means "power". To ask the other station how much transmit power they are running, you can send:

业余无线电通信缩语"PWR"表示"功率"。询问对方电台的发射 功率有多大可以发送：

Exam tips · 考试提示

The concise way to ask another station's power is "PWR?" (A). B is wordy and non-idiomatic, C is a non-sequitur ("accept my power"), D asks whether power is off — not the question.

U0715. The amateur-radio abbreviation "ABT" means "about" or "approximately". If, during a contact, you want to tell the other station "my transmitter's output power is about 10 W", you would send:

业余无线电通信缩语“ABT”具有“关于、大约”之意。如在 通联中需要向对方介绍“我台的发射功率约为10瓦”，我们可 以发：

Exam tips · 考试提示

Power is reported with the abbreviation PWR (for power), so "PWR ABT 10 W" correctly states "power about 10 W" (A). RIG means the rig/station equipment, not its power; ANT means antenna; and "I AM ABT 10 WATTS" is wordy free text, not the concise standard abbreviation form. Learning the standard Q- abbreviations (abbreviation) keeps on-air exchanges short.

U0716. The amateur-radio abbreviation "ANT" means "antenna". If you want to tell the other station that you are using a vertical grounded antenna erected at a height of 50 metres, you would send:

业余无线电通信缩语“ANT”表示“天线”。如需向对方介绍 自己使用了垂直接地天线，架高50米，我们可以发送：

Exam tips · 考试提示

A vertical grounded antenna is abbreviated GP (ground plane / vertical), and MH means metres high, so "ANT GP 50 MH" correctly conveys "antenna: vertical grounded, 50 m high" (A). The other options bury the key words in long free-text sentences with redundant or interrogative forms, not the concise standard phrasing.

U0717. When operating in CW or other text modes, we sometimes use the abbreviation "WX" to exchange weather information. If you want to share that it is sunny with a temperature of about 25 degrees Celsius, you would send:

进行CW或其他文字方式的通联时，我们有时会使用缩语 “WX”来交换天气信息。如需分享晴天，大约25摄氏度的气 温，我们可以发：

Exam tips · 考试提示

The standard structure is WX (weather) + condition + ES (and) + TEMP (temperature) + ABT 25 C, i.e. "WX FINE ES TEMP ABT 25 C" (A). ES is the abbreviation for "and". The other options scramble the word order or attach ABT to the wrong element, producing non-standard phrasing.