CRAC Class A (2025) — Questions 161–170

Obtaining a license by fraud or bribery draws administrative punishment by the radio authority (A), and criminal liability if a crime is constituted (B). C/D are correction-with-fine measures for different, lighter violations.

The Public Security Administration Punishments Law (《中华人民共 和国治安管理处罚法》) provides detention (5–10 days, or 10–15 for serious cases) for deliberate interference that persists after being ordered to stop. B ("no detention") and C ("no punishment") are false; D wrongly limits the duty to other amateur stations only.

The Cybersecurity Law (《中华人民共和国网络安全法》) requires network users to obey laws/public order, not endanger cybersecurity (A), not harm national security/honor/interests (B), not spread false info disrupting order (C), and not infringe others' rights (D). All four are core duties — relevant because digital/amateur- data activities also fall under this law.

The National Security Law (《中华人民共和国国家安全法》) defines the hierarchy: 人民安全为宗旨 (people's security = purpose), 政治安 全为根本 (political security = foundation), 经济安全为基础 (economic security = basis), 军事、文化、社会安全为保障 (military/cultural/social security = guarantee). So the order is 宗 旨、根本、基础、保障 (A).

The National Security Law (《中华人民共和国国家安全法》) obliges citizens/organizations to comply with national-security laws (A), report clues of endangering activities (B), truthfully provide evidence (C), and facilitate national-security work (D). All four are statutory obligations — including for radio amateurs handling sensitive emissions data. 频率划分与发射特性 Frequency Allocation and Emission Characteristics

On frequencies where amateur is a secondary service or shares with primary services, the station must comply with the specific usage provisions set by the radio management authority for that frequency (A). B (first-come-first-served) and D (arbitrary use) are wrong because a secondary service may never cause harmful interference, regardless of who was there first. C is insufficient because the allocation table alone does not cover the operational restrictions imposed on secondary use.

Within the bands that the radio management authority has approved for a station's use, all amateur stations enjoy equal frequency-use rights (A). B is too broad (not "any band"); C wrongly implies class-based priority; D wrongly implies association/club priority. No amateur station outranks another on an amateur frequency.

The fundamental secondary-service obligation is that the amateur station must not cause harmful interference to primary-service stations (A). B is wrong — a secondary service may not claim protection from primary users. C is also wrong here: a secondary service may claim protection from other secondary/same-service stations, so the statement "may not claim protection" is false. D is plainly prohibited — no interference is ever permitted.

This is the other half of the secondary-service rule: a secondary service must not claim protection from harmful interference by primary-service stations (A). B is the negation and is wrong. C is wrong because a secondary service may claim protection from other secondary/same-service stations. D is always prohibited.

The bands China allocates exclusively (专用) to the amateur service are 7 MHz, 14 MHz, 21 MHz, 28 MHz, and 47 GHz (A). 144 MHz and 430 MHz are shared (not exclusive), so B and D are wrong; 3.5 MHz is a shared primary band and 10 GHz is not in this exclusive list, so C is wrong.