CRAC Class C (2025) — Questions 121–130
U0161. In the Law on Public Security Administration Punishments of the People's Republic of China (《中华人民共和国治安管理处罚法》), which of the following statements about radio is correct?
在《中华人民共和国治安管理处罚法》中，无线电有关说法正 确的是：
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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. 频率划分与发射特性 Frequency Allocation and Emission Characteristics
U0165. When an amateur radio station transmits on a frequency where the amateur service or amateur-satellite service is used as a secondary service, or is shared with other primary services, it should observe:
业余无线电台在业余业务、卫星业余业务作为次要业务使用的 频率或者与其他主要业务共同使用的频率上发射操作时，应当 注意：
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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.
U0166. The correct statement about the use of amateur frequencies is:
关于业余频率的使用，正确的叙述是：
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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.
U0167. In the Table of Frequency Allocations, when a band is allocated to the amateur service or amateur-satellite service together with several other services, and the amateur service and amateur- satellite service are secondary services, the rule an amateur radio station must follow is:
在频率划分表中，当一个频段划分给业余业务或卫星业余业务 和多个其他业务，并且业余业务和卫星业余业务作为次要业务 时，业余无线电台应该遵循的规则是：
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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.
U0168. In the Table of Frequency Allocations, when a band is allocated to the amateur service or amateur-satellite service together with several other services, and the amateur service and amateur- satellite service are secondary services, the rule an amateur radio station follows is:
在频率划分表中，当一个频段划分给业余业务或卫星业余业务 和多个其他业务，并且业余业务和卫星业余业务作为次要业务 时，业余无线电台遵循的规则是：
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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.
U0169. The frequency bands allocated by our country exclusively to the amateur service and amateur-satellite service are:
我国分配给业余业务和卫星业余业务专用的频段有：
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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.
U0170. The bands below 30 MHz that our country allocates for shared use between the amateur service (and amateur-satellite service) and other services, with the amateur service as one of the primary services, are:
我国分配给业余业务和卫星业余业务与其他业务共用、并且业 余业务和卫星业余业务作为主要业务之一的30MHz以下频段 有：
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Below 30 MHz, the shared bands where amateur is one of the primary services include 1.8 MHz, 3.5 MHz, 14.25 MHz, 18.068 MHz, and 24.89 MHz (A). B wrongly includes 7 MHz (exclusive) and 21 MHz (exclusive); C/D include 10.1 MHz which is a WARC band allocated as a secondary/shared category, not a shared-primary band in this listing.
U0171. In the VHF and UHF range, our country allocates the amateur service (and amateur-satellite service) for shared use with other services under both primary and secondary categories. Which of the following frequencies are allocated for shared use with other services where the amateur service is a primary service:
我国在VHF和UHF范围内分配给业余业务和卫星业余业务与其 他业务共用并设业务类别为主要业务与次要业务，以下那些频 率分配给业余业务和卫星业余业务与其他业务共用并且业余业 务和卫星业余业务作为主要业务：
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In VHF/UHF, 50 MHz and 144 MHz are allocated to amateur as a primary service sharing with others (A). 430 MHz is a secondary service, so any option containing 430 MHz (B, C, D) is wrong.
U0172. The number of bands our country allocates for shared use with other services where the amateur service is the sole primary service, and such a band below 3 GHz, are respectively:
我国分配给业余业务和卫星业余业务与其他业务共用、并且业 余业务和卫星业余业务作为唯一主要业务的频段的个数以及在 3GHz以下的该类频段分别为：
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There are 3 bands where amateur is the sole primary among shared allocations; below 3 GHz one such band is 144–146 MHz (A). 7.0– 7.2 MHz and 50–54 MHz are exclusively amateur, and 28–29.7 MHz is exclusive, so B/C/D are wrong.
U0173. The bands below 1200 MHz that our country allocates for shared use where the amateur service is a secondary service are:
我国分配给业余业务和卫星业余业务与其他业务共用、并且业 余业务和卫星业余业务作为次要业务的1200MHz以下频段有：
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Below 1200 MHz, the secondary amateur allocations include 135.7 kHz, 5351.5 kHz, 10.1 MHz, and 430 MHz (A). 3.5 MHz and 7 MHz are primary/exclusive, 50 MHz and 144 MHz are primary, and 18.068 MHz / 24.89 MHz are shared-primary WARC bands — so B, C, and D are wrong.