CRAC Class B (2025) — Questions 291–300
U0702. Before initiating a call, an amateur station should listen for a while, then use a brief query to confirm the frequency is clear. When using CW or other text modes, the suitable short phrase for this situation is:
业余电台在发起呼叫前应先守听一段时间，然后再通过简短询 问来确定当前频率是空闲的。使用CW或其他文字方式进行通联 时，适合这一场景的短句是：
Exam tips · 考试提示
QRL? means "Are you busy?" / "Is this frequency in use?" — exactly the query to check whether a frequency is occupied before calling (A). QRT = "stop sending / are you closing down"; QRU = "have you anything for me?"; QRV = "are you ready?" — none asks about frequency occupancy.
U0703. The way for amateur station BH1ZZZ to send a CQ call in CW or other text mode is:
业余电台BH1ZZZ用CW或其他文字方式发起CQ呼叫的方法 为：
Exam tips · 考试提示
A standard CQ sends "CQ" three times, "DE", your call sign three times, then "PSE K" (A). B uses QRZ? (means "who is calling me?" — not a CQ); C omits the call repetition and uses KN (invitation to a specific station); D's excessive CQ repetition and "GA" are non-standard.
U0704. The way for amateur station BH1ZZZ to call BH8YYY in CW or other text mode is:
业余电台BH1ZZZ使用CW或其他文字方式呼叫BH8YYY的方 法为：
Exam tips · 考试提示
Calling a specific station: repeat the target call sign three times, "DE", your own full call sign three times, then "PSE K" (A). Abbreviating your call to "1ZZZ" (B, C) drops the prefix and is incorrect; sending only "8YYY" (D) omits the district prefix of the target — both are improper.
U0705. After establishing a CW contact, Xiaoming gives the other station an RST report of "579". He can send:
建立CW联络后，小明给对方"579"的信号报告。他可以发：
Exam tips · 考试提示
To send an RST report you say "UR RST 579" or simply "UR 579" (A). B ("thanks for report 579") is a reply to receiving a report, not giving one; C ("remarks is 579") and D ("is 579 ok for you?") are not standard report phrasing.
U0706. In a CW contact, after receiving the other station's signal report, we usually acknowledge receipt and thank them; we can send:
在CW联络中收到对方给出的信号报告后，我们通常会回应收妥 并致谢，可以发送：
Exam tips · 考试提示
"R" = received/acknowledged; "TKS FER RPT/RPRT" = thanks for the report — the standard acknowledgement after getting a report (A). B thanks for "your rig report" (odd), C references "remarks", D is not idiomatic CW.
U0707. In everyday CW contacts, we thank the other party for the nice contact; we can send:
在CW日常通联中，我们会感谢对方积极参与了联络，可以发 送：
Exam tips · 考试提示
"TNX FER NICE QSO ES HPE CU AGN 73 TU" = "thanks for the nice contact, and hope to see you again, 73 (best regards), thanks" — the standard closing for a pleasant QSO (A). B thanks for "nice report", C for "QSL info", D for "weather info" — not the general "nice contact" thanks.
U0708. In CW contests or DX contacts, we thank the other party for the contact. We can send:
在CW竞赛或DX通联中，我们会感谢对方积极参与了联络。我 们可以发：
Exam tips · 考试提示
In fast contest/DX CW the brief thanks is "TU" (= thank you) (A). "FB" = fine business (good), "NICE"/"FINE" are not the standard acknowledgment token in this high-speed context.
U0709. During a CW contact, Xiaoming wants to introduce his name. He can send:
CW通联时，小明拟介绍自己的名字。他可以发：
Exam tips · 考试提示
NAME is the CW abbreviation for "name", so "NAME XIAOMING" gives your name (A). MODE = mode, RIG = equipment, ANT = antenna — none introduces a person's name.
U0710. In CW contacts, the abbreviation "OP" means the operator's name. When Xiaoming introduces his name to the other station he can send:
在CW通联中，缩语"OP"表示操作员的名字。小明向对方介绍 自己的名字时可以发：
Exam tips · 考试提示
"OP" = operator, so "OP XIAOMING" gives the operator's name (A). "B4" = before, "NICE" = nice, "DR" = dear (used before a name as a title) — none simply states your own name as OP does.
U0711. In a CW contact, if you know the other operator's name (or they have introduced themselves), you may prefix it with "dear/esteemed" when addressing them. Suppose the other station is operated by Zork; you can send:
在CW通联中，如果已知对方操作员的名字，或是对方已做自我 介绍，则我们在称呼其名时可以冠以"尊敬的"。假设对方电台 由Zork操作，我们可以发：
Exam tips · 考试提示
"DR" = dear (a courteous title), so "DR ZORK" addresses the operator respectfully (A). HR = here, NR = number, UR = your — none serves as the "dear" title.