CRAC Class A (2025) — Questions 81–90
U0080. Which of the following statements about the call-sign suffix (the fourth part) is correct? (Choose all that apply.)
关于呼号后缀（呼号第四部分），下列说法正确的是：
Exam tips · 考试提示
The suffix is 1–4 letters or letter/digit mixes (A); 1-digit, 4-digit, and digit-bearing suffixes are reserved (B); and distress-confusable groups (QOA–QUZ, SOS, XXX, TTT) are excluded (C). The suffix is not purely numeric (D wrong).
U0081. When provincial radio management authorities issue general amateur radio station call signs, which of the following is correct? (Choose all that apply.)
各省、自治区、直辖市无线电管理机构核发一般业余无线电台 呼号时，下列说法正确的是：
Exam tips · 考试提示
Provinces assign the type letter in the fixed G/H/I/D/A/B/C/E/F/K/L sequence (A), build suffixes from two-letter then three-letter combos (B), and all use the same national prefix B (C). The district number differs by province (D wrong) — that's how you tell the region.
U0082. If an amateur radio operator is dissatisfied with the call sign already issued to them, may they apply for a different amateur radio station call sign to be issued?
业余无线电爱好者对已核发给自己的电台呼号不满意，是否可 以申请另行核发业余无线电台呼号？
Exam tips · 考试提示
You cannot get a replacement call sign just because you dislike the one assigned — once issued, no other call sign is given (A). Upgrading class, paying a fee, or renewing do not entitle you to a new call sign (B, C, D wrong).
U0083. The method for determining the available ranges of call-sign prefix letters and suffix characters in each locality is:
各地业余无线电台呼号前缀字母和后缀字符的可用范围的确定 方法是：
Exam tips · 考试提示
The available prefix-letter and suffix-character ranges are compiled and allocated centrally by the national radio management authority (A). Local authorities or amateur organizations do not decide these on their own (B, C, D wrong).
U0084. Which of the following statements about using an amateur radio station call sign is correct? (Choose all that apply.)
关于使用业余无线电台呼号正确的是：
Exam tips · 考试提示
You must identify at the start (A) and end (B) of each contact, and at least every 10 minutes during it (C). Sending a made-up call sign as a supplement (D) is prohibited — only the real assigned call sign may be used.
U0085. An amateur radio station call sign consists of which of the following parts? (Choose all that apply.)
业余无线电台呼号由下列哪些部分组成：
Exam tips · 考试提示
A Chinese call sign is composed of four parts: prefix (A), station type (B), district number (C), and suffix (D). All four are required components.
U0086. The Measures for the Administration of Amateur Radio Stations (《业余无线电台管理办法》) require an amateur station to actively transmit its own call sign when establishing and ending a contact. The situations that permit using part of the call sign (such as the suffix) in place of the full call sign include:
《业余无线电台管理办法》要求业余电台在建立和结束通信时 主动发送本台呼号。允许使用呼号的一部分（比如后缀）替代 完整呼号的情况包括：
Exam tips · 考试提示
No partial call sign (suffix only) may substitute for the full call sign — the Measures require the complete call sign at start and end of every contact (A). Options B/C/D suggesting suffix-only ID in some cases are all incorrect.
U0087. In an amateur radio contact, may the district code plus suffix taken from your own or the other station's call sign be regarded as the "station call sign" in the Measures for the Administration of Amateur Radio Stations (《业余无线电台管理办法》)?
在业余无线电通联中，是否可将本台或对方电台呼号之中的地 区码加后缀视作《业余无线电台管理办法》中的“电台呼 号”？
Exam tips · 考试提示
A district-code-plus-suffix fragment is an incomplete call sign with no identifying validity and cannot be treated as the station call sign (A). Familiarity, band, or domestic-vs-DX context do not make a partial ID acceptable (B, C, D wrong).
U0088. Regarding China's amateur radio station district numbers, the province (autonomous region / municipality directly under the central government) with district number 1 is:
关于我国业余无线电台分区号，业余分区号为1的省（自治区、 直辖市）为：
Exam tips · 考试提示
District number 1 is Beijing (北京). Heilongjiang is 2, Hebei is 3, and Shanghai is 4 — so only A is correct.
U0089. Regarding China's amateur radio station district numbers, the provinces with district number 2 are: (Choose all that apply.)
关于我国业余无线电台分区号，业余分区号为2的省（自治区、 直辖市）为：
Exam tips · 考试提示
District 2 covers the three Northeast provinces: Heilongjiang (A), Jilin (B), and Liaoning (C). Guangdong is district 7, so D is wrong.