CRAC Class C (2025) — Questions 51–60

Minors may establish stations within their certificate's privileges: a Class A minor may run a VHF station ≤25 W (A), and a Class B minor may likewise run a VHF station ≤25 W (B). HF (below 30 MHz) operation is not granted to minors under these provisions, so C and D are incorrect.

The national radio management authority sets the question bank and standards (A); the authority or its delegate publicly announces sessions in advance (B); passing candidates receive the certificate from the authority (C); and no fee is charged (D). All four statements are correct.

Pre-new-Measures Class B certificate holders are grandfathered: they may operate below 30 MHz at up to 100 W (A) and above 30 MHz at up to 25 W (B). They are NOT required to downgrade to the new Class B limit (C is wrong), and their old certificate remains valid (D is wrong). 业余无线电台呼号 Amateur Station Call Signs

Egypt lies in CQ zone 34. The prefix 5A is Libya, also in CQ zone 34, so it shares Egypt's zone (A). The distractors are in other zones: 5W = Samoa (zone 32), 5T = Mauritania (zone 35), 5X = Uganda (zone 37).

These are standard call-sign prefixes: 3V = Tunisia (突尼斯/Tunis), 4X = Israel, 5A = Libya, 6Y = Jamaica. Option A lists them in the correct order; the others misassign countries.

The NCDXF/IARU (Northern California DX Foundation / International Amateur Radio Union) beacon network includes a Chinese beacon with the call sign VR2B (Hong Kong). BS7H is the Huangyan Island (Scarborough) coral-island activation, B0CRA is a China Radio Association special-event call, and 4U1UN is the UN station in New York — none is the Chinese NCDXF/IARU beacon.

In China's call-sign plan the prefix "BJ" is assigned to space (satellite) amateur stations, so BJ1 is a space-station prefix and is therefore NOT selected. The prefixes BY, BR and BS are used for ordinary ground-based or other amateur stations and do NOT denote space stations, so A, B and C are the correct "does not belong" choices. 业余无线电台的法定设置与使用 Lawful Establishment and Operation of Stations

The lawful path is to apply to the radio management authority under the Measures and obtain a radio station license (A). Joining an association, association approval, or employer/neighborhood approval are not the legal requirement (B, C, D wrong).

By law an amateur radio station is for intercommunication, technical research, and self-training (A) — the ITU definition of the amateur service. Personal, entertainment, or vehicle-safety use (B, C, D) is not its statutory purpose.

Multiple devices at one station count as a single station with one call sign, but every device must be inspected and its parameters recorded in the license (A). Inspecting only one device (B, D) or giving each device its own call sign (C) is wrong.