Lưu ý: Đây là đáp án cho mini-quiz 5 câu/bài tích hợp trong hệ thống điện tử. Đáp án được đánh số theo thứ tự các options (A=1, B=2, C=3, D=4).
Chương 1 — Nền Tảng Ngôn Ngữ
B1Từ và Câu Đơn GiảnChương 1 A2
Mini-Quiz (5 câu)
Q1Which word is a technical noun?B frequency
Q2What does "abbreviation" mean?B a shortened form
Q3Which is the plural of "frequency"?C frequencies
Q4In "The signal is strong", "strong" is a(n):C adjective
Q5The suffix "-tion" typically forms:C nouns
B2Cấu Trúc Chủ NgữChương 1 A2
Mini-Quiz (5 câu)
Q1Which is the correct noun phrase?B strong signal
Q2In "the communication officer", the head noun is:C officer
Q3Which uses a gerund as subject?B Reading improves skills
Q4"It is important to maintain radio discipline." "It" is:B dummy subject
Q5Which is a correct compound noun?C radio equipment
B3Cấu Trúc Vị NgữChương 1 B1
Mini-Quiz (5 câu)
Q1Which sentence uses passive voice correctly?B The signal is sent
Q2In "The system operates on VHF", "on VHF" is:C adverbial
Q3Which is the present perfect tense?C He has sent
Q4"The equipment must be calibrated" expresses:B obligation
Q5Which verb is typically intransitive?C operate (alone)
B4Thông Tin NềnChương 1 B1
Mini-Quiz (5 câu)
Q1Which sentence provides background context?B VHF has been used since the 1960s
Q2"Developed in the 1940s, radar became essential…" is:B participial phrase
Q3Which expresses historical background?C Originally, the system used AM signals
Q4"The radio, which was invented in 1895, …" — the clause is:B non-defining relative
Q5Which tense for background information?B past simple / present perfect
B5Mệnh Đề và Câu PhứcChương 1 B1
Mini-Quiz (5 câu)
Q1Which is a defining relative clause?B The officer who is on duty monitors ch.16
Q2"Although the signal is weak, communication is maintained." This is:C concession
Q3Which is a Type 1 conditional?B If the battery dies, the radio stops
Q4"The system, which costs $5000, is reliable." The relative clause is:B non-defining
Q5Which conjunction expresses condition?C if
Chương 2 — Thông Tin Liên Lạc Kỹ Thuật
1Hệ Thống Thông Tin Liên LạcChương 2 B1
Q1What does "duplex" mean?B two-way simultaneous
Q2Which is NOT a type of communication system?C hydraulic pipe
Q3"Bandwidth" refers to:B the range of frequencies available
Q4Modulation is:B adding information to a carrier wave
Q5VHF marine radio frequency band:B 30–300 MHz
2Mạng Điện ThoạiChương 2 B1
Q1PSTN stands for:B Public Switched Telephone Network
Q2The "local loop" is:B connection between exchange and customer premises
Q3VoIP stands for:A Voice over Internet Protocol
Q4What does SS7 do?B Controls signaling between telephone exchanges
Q5Which codec for voice in digital telephony?B G.711
3Mạng Dữ Liệu và Máy TínhChương 2 B1
Q1Network type covering a single building:C LAN
Q2A router operates at which OSI layer?C Layer 3
Q3What does a "gateway" do?C connects networks using different protocols
Q4Topology connecting all nodes to a central device:D star
Q5"Latency" means:B delay in data transmission
4Các Hệ Thống Truyền DẫnChương 2 B1+
Q1SDH stands for:A Synchronous Digital Hierarchy
Q2Submarine cables amplification technology:B Erbium-Doped Fibre Amplifiers (EDFA)
Q3PDH (Plesiochronous Digital Hierarchy) is:B an older multiplexing standard
Q4Starlink provides internet via:B LEO satellite constellation at ~550 km
Q5OTN stands for:A Optical Transport Network
5Thông Tin QuangChương 2 B1+
Q1Light travels through optical fibre by:C total internal reflection
Q2DWDM allows:B multiple wavelengths on one fibre simultaneously
Q3Dispersion in optical fibre is:B spreading of light pulses over distance
Q4EDFA stands for:A Erbium-Doped Fibre Amplifier
Q5Core of standard single-mode fibre:B silica glass
6Thông Tin Vệ TinhChương 2 B2
Q1GEO satellites orbit at approximately:C 36,000 km
Q2Signal delay in GEO communications:B the great orbital distance (~240 ms)
Q3VSAT stands for:A Very Small Aperture Terminal
Q4Compared to GEO, LEO satellites have:B lower latency
Q5Military satellite anti-jamming:B spread spectrum techniques
7Hệ Thống Vô TuyếnChương 2 B2
Q1"Handover" means:B transferring a call between base stations
Q24G LTE access technology:C OFDMA
Q3GSM stands for:B Global System for Mobile communications
Q4VHF frequency range:B 30–300 MHz
Q5MIMO technology uses:B multiple antennas to improve capacity
8Thông Tin Không DâyChương 2 B2
Q1Wi-Fi typically operates on:B 2.4 GHz and/or 5 GHz
Q2Bluetooth avoids interference using:B frequency hopping spread spectrum
Q3A "piconet" is:B a Bluetooth network of up to 8 devices
Q4ZigBee is designed for:B low-power IoT sensors and automation
Q5The ISM band is:B Industrial, Scientific and Medical — unlicensed
9Vô Tuyến Cấu Hình Mềm (SDR)Chương 2 B2
Q1SDR stands for:B Software-Defined Radio
Q2In SDR, radio functions implemented in:C software
Q3Key advantage of SDR:B reconfigurable for multiple standards via software
Q4GNU Radio is:B open-source software for SDR development
Q5SDR in cognitive radio:B sense and adapt to available spectrum dynamically
10Tác Chiến Điện TửChương 2 B2
Q1Primary goal of electronic jamming:B disrupt enemy communications and radar
Q2SIGINT stands for:B Signals Intelligence
Q3ECM includes:B signal jamming and deception
Q4EMCON means:B Emission Control — limiting own radio emissions
Q5"Frequency hopping" defeats jamming by:B rapidly changing frequencies to avoid fixed jamming
11SMCP — Dấu Hiệu Tin TứcChương 2 B1
Q1SMCP stands for:A Standard Marine Communication Phrases
Q2Message marker for a question:C QUESTION
Q3"MAYDAY" is used for:C life-threatening distress
Q4"WARNING" marker indicates:B danger to a vessel or person
Q5In SMCP, messages should be:C short, clear and standardised
12SMCP — Tình Huống Khẩn CấpChương 2 B1
Q1Correct distress call sequence begins:C MAYDAY MAYDAY MAYDAY
Q2PAN-PAN is used for:C urgent situation not immediately life-threatening
Q3SECURITÉ announces:B navigational or meteorological hazard
Q4VHF channel for distress calls:D Channel 16
Q5After MAYDAY, next information:A vessel name, position, nature of distress, persons on board
13SMCP — Cụm Từ Theo Ngữ CảnhChương 2 B1
Q1Phrase to request port entry:B Request permission to enter port
Q2"I am not under command" means:B the vessel cannot manoeuvre
Q3To report own position in SMCP:A "My position is…"
Q4"Stand by on channel 16" means:B maintain watch on channel 16
Q5Correct SMCP instruction:B "Stop your engines"
14CUES Unit 1 — Thủ Tục An ToànChương 2 B2
Q1CUES stands for:A Code for Unplanned Encounters at Sea
Q2Primary purpose of CUES:B reduce risk of incidents during unplanned naval encounters
Q3In CUES, WPNS refers to:B weapons status declaration code
Q4COLREGS are:B International Regulations for Preventing Collisions at Sea
Q5CUES "breakdown signal" indicates:B vessel has a problem affecting its ability to manoeuvre
15CUES Unit 2 — Tín Hiệu Chiến ThuậtChương 2 B2
Q1In NATO phonetic, "A" is:A ALFA
Q2A "governing group" in CUES:A modifies the meaning of subsequent signals
Q3"CORPEN" in CUES orders:B a course change to a specified heading
Q4Submarine pyrotechnic signals:B communicate position/status when surfacing is not possible
Q5Single-letter emergency signals from:B International Code of Signals (ICS)
16Máy Vô Tuyến VHF IC-M402Chương 2 B1
Q1IC-M402 frequency band:C VHF 156–174 MHz
Q2Channel 16 on marine VHF is:B the international calling and distress channel
Q3MMSI stands for:B Maritime Mobile Service Identity
Q4DSC allows:B automated digital distress alerts with position data
Q5"Squelch" on a VHF radio:B suppresses background noise when no signal is present
17Từ Vựng Máy Vô TuyếnChương 2 B1
Q1"Transceiver" means:C a device that both transmits and receives
Q2"Simplex" communication means:B one direction at a time
Q3A "dual watch" function:A monitors two channels simultaneously
Q4IPX7 waterproofing means:B submersible to 1 metre for 30 minutes
Q5IC-M402 feature to locate vessel in distress:A MMSI combined with DSC
Chương 3 — Thông Tin Hải Quân Chuyên Ngành
S1Giao Tiếp Trên Buồng LáiChương 3 B2
Q1"Hard a-starboard" is:B a helm order to turn right (port rudder)
Q2Engine order meaning "go backwards slowly":C SLOW ASTERN
Q3"Heave to" means:B stop the vessel by balancing forces
Q4Bridge MAYDAY call essential information:B name, position, nature of distress, persons on board
Q5"Stand by for manoeuvre" means:B prepare for an upcoming manoeuvre
S2Tình Huống Thực Hành Hàng HảiChương 3 B2
Q1VTS stands for:A Vessel Traffic Service
Q2When vessel is aground, distress signal:A MAYDAY
Q3A pilot is:B a maritime navigator who guides vessels into port
Q4"Berthing" means:B securing a vessel at a dock or wharf
Q5Port entry requests made on:C the port's designated working channel
N1Tổ Chức Hải Quân Việt NamChương 3 B2
Q1Vietnamese Navy is part of:B Vietnam People's Army
Q2A naval "squadron" is:B a group of ships operating together
Q3"Fleet" refers to:B a collection of naval vessels under one command
Q4A "patrol vessel" is used for:B monitoring and protecting maritime territory
Q5SONAR is used for:B detecting objects underwater using sound waves
N2Nhiệm Vụ Sĩ Quan Thông TinChương 3 B2
Q1Communications officer's PRIMARY duty:B maintaining and operating all communication systems on board
Q2"Radio watch" means:B continuous monitoring of assigned radio frequencies
Q3"GUARD" in ACP 125 means:B monitor a frequency without transmitting on it
Q4An "alarm signal" in naval comms:B attracts attention to an urgent incoming message
Q5Naval communications officers are trained in:B ACP/SMCP/CUES and military radio protocol
A1Quy Trình VTĐ & COMSECChương 3 B2
Q1COMSEC stands for:A Communications Security
Q2TRANSEC protects against:B enemy detecting, intercepting or disrupting transmissions
Q3SIGINT is:B intelligence gathered from intercepting signals
Q4EMCON is used to:B reduce or stop radio emissions to avoid detection
Q5A military callsign is:B a code identifier used instead of vessel/unit name
A2Chính Xác & Kỷ Luật MạngChương 3 B2
Q1NATO phonetic word for "M":A MIKE
Q2"ROGER" means:B I have received your last transmission
Q3"WILCO" means:B I understand your message and will comply
Q4"FIGURES" is spoken before:B numerals to distinguish them from words
Q5"OVER" at end of transmission means:B I have finished transmitting — your turn to respond
E2Tác Chiến Điện Tử (Elec U2)Chương 3 B2
Q1An "array" antenna:B uses multiple elements to increase gain and directivity
Q2"Relay" in communications means:B receiving and retransmitting a signal to extend range
Q3"Digital" signals are:B signals represented as discrete binary values (0/1)
Q4RADAR stands for:A Radio Detection and Ranging
Q5Electromagnetic waves in vacuum travel at:C the speed of light (~3×10⁸ m/s)
CS1An Ninh Mạng Hải QuânChương 3 B2
Q1OPSEC stands for:A Operational Security
Q2Cyber attack using deceptive emails:C Phishing
Q3GPS spoofing differs from GPS jamming because:B provides a false position the receiver accepts as genuine
Q4NCMS stands for:B Naval Communications Security Material System
Q5In Conditional Type 3, if-clause uses:C past perfect