CRAC Class C (2025) — Questions 31–40
U1147. Which of the following amateur radio stations are licensed by the national radio management authority? (Choose all that apply.)
下列哪些业余无线电台由国家无线电管理机构许可：
Exam tips · 考试提示
Per the Measures for the Administration of Amateur Radio Stations (《业余无线电台管理办法》), the national radio management authority (国家无线电管理机构) licenses short-wave/HF stations above 15 W and other important stations involving national sovereignty and security (A, B). The 15 W+ threshold applies specifically to HF (short wave), not MF or LF, so C and D are excluded.
U1148. Which of the following applications to establish and operate an amateur radio station should be submitted to the national radio management authority? (Choose all that apply.)
下列哪些申请设置、使用业余无线电台应向国家无线电管理机 构提交：
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Applications that go to the national radio management authority (国家无线电管理机构) are short-wave (HF) stations above 15 W and other important stations involving national sovereignty and security (A, B). Repeaters (业余中继台) and beacons (业余信标台) are handled at the provincial/municipal level, so C and D are incorrect.
U0044. Which of the following statements about amateur repeaters is INCORRECT? (Choose all that apply.)
关于业余中继台的说法下列错误的是：
Exam tips · 考试提示
The question asks for INCORRECT statements about repeaters. A is the correct definition of a 业余中继台 (receive, amplify, retransmit to extend range); therefore the incorrect ones are B (beacon description), C (attenuate/shrink range), and D (receive beacon) — marked correct as the "wrong" statements to select.
U0045. Which of the following statements about amateur beacon stations is INCORRECT? (Choose all that apply.)
关于业余信标台的说法下列错误的是：
Exam tips · 考试提示
The question asks for INCORRECT statements about beacon stations. A is the correct definition of a 业余信标台 (transmit-only beacon to verify propagation); the incorrect ones are B (receive beacon), C (repeater function), and D (attenuate/shrink) — marked as the "wrong" statements to select.
U0046. Which of the following statements about amateur repeaters are correct? (Choose all that apply.)
关于业余中继台哪下列哪些选项正确：
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Correct repeater principles: equal service to all in coverage (A) and resource-sharing/intensive site layout (B). C (priority for applicant's team) and D (mandatory payment) violate the equal-service principle.
U0047. Which of the following statements about establishing an amateur repeater is correct? (Choose all that apply.)
关于设置业余中继台下列说法正确的是：
Exam tips · 考试提示
Establishing a repeater requires: resource-sharing site layout (A), equal service (B), published location/frequency/parameters (C), and coordination if coverage crosses administrative regions (D). All four are correct.
U0048. The establishment and technical parameters of an amateur repeater should satisfy the following key conditions:
业余中继台的设置和技术参数等应满足下列关键条件：
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Repeater establishment and parameters must comply with state and local radio-management provisions (A). B (club plan), C (local only), and D (applicant's needs) are insufficient or wrong. 操作技术能力验证 Operator-Capability Verification
U0053. The national radio management authority and its entrusted organizations may organize and implement the following classes of amateur radio operator-capability verification: (Choose all that apply.)
国家无线电管理机构及其委托的机构可以组织实施如下类别的 业余无线电台操作技术能力验证：
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The national authority and its entrusted bodies may organize Class A, B, and C verification (A, B, C). D (Grade-1 personal certificate) is an obsolete old-system category, not part of the current three-class system.
U0054. Into which classes is amateur radio operator-capability divided?
业余无线电台操作技术能力分为哪几类：
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Operator capability is divided into three classes: A类, B类, C类 (A, B, C). There is no D类 in the current system (D is a distractor).
U0055. The main difference between amateur radio stations of different classes lies in: (Choose all that apply.)
不同类别业余无线电台的主要区别在于：
Exam tips · 考试提示
Different operator-certificate classes (Class A / B / C) differ in the permitted operating frequency range and the maximum transmit power (A, B). Equipment function or antenna height/length are not the defining distinction between classes — a station's class governs where and how strongly you may operate, not what gear or antenna you own.