1級電気通信工事施工管理技士学科過去問題/令和7年1次検定～

Past Exam Questions for the 1st Class Telecommunications Construction Management Engineer Examination (2025/2024/2023/2022/2021/2020/2019) / Reiwa 7 to Reiwa 1 This app is for those aiming to pass the exam through self-study and repeated review of past questions, including studying during commutes. There are no in-app purchases or advertisements. You can repeatedly study on your mobile phone or tablet as preparation for the Reiwa 8 exam. For each question, you can quickly check the answer by clicking [Question ⇒ Answer]. The question text is also included on the answer page, making it easy to review. The "Learning Confirmation Test (R7-R1)" presents 10 questions randomly, allowing you to check your self-understanding. Let's study little by little on your mobile phone or tablet during your commute or breaks on the train or bus. *This includes past exam questions from 2024, 2023, 2022, 2021, 2020, and 2019. One of the most important things for obtaining a qualification is repeatedly reviewing past exam questions. By repeatedly reviewing past questions, you can understand the structure of the questions, the types of questions that appear, and your strengths and weaknesses. This allows you to create an exam preparation plan, including which areas to focus on and where to earn points. Find your own learning method and proceed with your studies systematically. [Example Problems] [Problem] R06-A-1 When a voltage V is applied to a parallel-plate air capacitor with an electrode distance d[m] as shown in Figure 1, a charge Q₀[C] is stored. If, as shown in Figure 2, the area of ​​the electrode plates remains unchanged, the distance between the electrodes is halved, and a dielectric material with relative permittivity εr=2 is inserted without gaps between the electrodes, and a voltage V is applied, which of the following is the appropriate magnitude of the charge Q[C] stored? However, the edge effects of the capacitor are not considered. [Problem] R06-A-2 Which combination of words is appropriate to fill in (A) and (B) in the following description of an annular iron core coil? "When the current flowing through a coil changes, the coil's [(A)] also changes, generating an induced electromotive force in the coil itself. In the annular core coil with a primary and secondary coil wound around it, as shown in the figure below, when there is no magnetic flux leakage, the change in the secondary coil's [(A)] is proportional to the change in the primary coil's current. Therefore, the induced electromotive force generated in the secondary coil is proportional to the change in the primary coil's current, and the proportionality constant at this time is called [(B)]." [Problem] R06-A-3 A voltmeter with a maximum scale of 50[V] shown in the figure below was connected to a 400[kΩ] series resistor, and a voltage of 40[V] was measured. The voltmeter showed a value of 8[V]. Which of the following combinations of the internal resistance rv[kΩ] of this voltmeter and the value of the series resistor Rm[kΩ] to be connected so that this voltmeter can measure a maximum voltage of 300[V] is appropriate? [Problem] R06-A-4 In the RLC series circuit shown in the figure below, given the AC power supply voltage E=100[V], resistance R=10[Ω], inductive reactance XL=12√3[Ω], and capacitive reactance Xc=2√3[Ω], which of the following is an appropriate value for the magnitude of the current I[A] flowing through the circuit? [Problem] R06-A-5 For four possible events P(i) (i=1 to 4) that can occur from a certain information source, given that the probability of occurrence for each event is P(1)=1/2, P(2)=1/4, P(3)=1/8, and P(4)=1/8, which of the following is an appropriate value for the average information (entropy) H[bit] of this information source? [Problem] R06-A-6 When transmitting an audio signal with a maximum frequency of 8 [kHz] encoded in 8 [bit] binary using pulse code modulation (PCM) in real time, which of the following is the appropriate value for the minimum required transmission speed S [kbps]? [Problem] R06-A-7 As shown in the figure below, System 1 with availability A₁=0.90 and System 2 with availability A₂=0.90 are connected in parallel, and System 3 with availability A₃=0.80 is connected in series. What is the appropriate value for the overall availability At of the computer system? [Problem] R06-A-8 When performing decimal subtraction (141)₁₀-(65)₁₀ using binary complement representation, which of the following combinations of words is appropriate for (A) and (B) in the following calculation process? [Problem] R06-A-9 In the logic circuit shown in the figure below, which of the following is the correct logical expression for output F? Note that for logical variables A and B, A+B represents the logical OR, A･B represents the logical AND, and Ā represents the negation of A. [Problem] R06-A-10 In the static characteristics of the transistor (common emitter) shown in the figure below, which of the following is the correct value for the DC current amplification factor hFE when VCE=5[V] and IB=10[μA]? Note that IB represents the base current, Ic represents the collector current, VBE represents the base voltage, and VCE represents the collector voltage. [Problem] R06-A-11 Which of the following statements regarding the Phase Shift Keying (PSK) method of digital modulation is incorrect? 8PSK is more resistant to phase changes due to noise during transmission and has superior error characteristics compared to QPSK. [Question] R06-A-12 In OFDM, guard bands are provided between subcarriers to prevent interference between adjacent channels. [Question] R06-A-13 Which of the following is an appropriate description of the protocol hierarchy of the OSI reference model? The OSI reference model is a model that classifies and organizes the functions necessary for communication into seven layers, and is a guideline for understanding the design and functions of protocols in computer networks. [Question] R06-A-14 Which of the following is an appropriate description of the functions of a database management system (DBMS)? Database operation functions refer to functions that perform data updates and data retrieval based on user queries. [Question] R06-A-15 Which of the following is an incorrect description of the functions of a computer's operating system (OS)? User management is a function that manages the allocation of main memory for multiple programs running within the computer. [Question] R06-A-16 Which of the following is an incorrect description of the representation method of character data (character code)? ASCⅡ is a character code established by the American National Standards Institute (ANSI), and is assigned to the alphabet, numbers, symbols, half-width katakana, and control symbols. [Question] R06-A-17 Which of the following is the correct amplitude characteristic of the output signal Vout when the input signal Vin is applied to the filter circuit shown in the figure below? [Question] R06-A-18 Which of the following statements about semiconductors is incorrect? In an n-type semiconductor, which is an intrinsic silicon semiconductor mixed with a donor such as arsenic, the number of free electrons is less than the number of holes. [Question] R06-A-19 In the Hartley oscillator circuit shown in the figure below, when the inductances of the two coils are L₁[H] and L₂[H] respectively, the mutual inductance between the two coils is M[H], and the capacitance of the capacitor is C[F], which of the following is the correct formula for calculating the oscillation frequency ƒ[Hz] of this circuit? [Question] R06-A-20 Which of the following descriptions regarding optical modulation methods is incorrect? Direct modulation, when modulated at high speed, causes chromatic dispersion, a phenomenon of wavelength fluctuation during modulation, which limits the transmission distance. [Question] R06-A-21 Which of the following descriptions regarding optical fiber repeaters is incorrect? A 3R regenerative repeater converts the optical signal into an electrical signal using a photodetector, performs equalization amplification, timing extraction, and multiplexing, and then converts it back into an optical signal for transmission. [Question] R06-A-22 Which of the following descriptions regarding SIP used in IP phones, etc., is incorrect? The SIP message body is used to notify the media and port number used after session establishment, and is written using RTP (Realtime Transport Protocol). [Question] R06-A-23 Which of the following descriptions regarding coaxial cables is incorrect? Compared to waveguides, it has less loss, and this value decreases as the frequency increases. [Question] R06-A-24 Which of the following statements regarding Rayleigh scattering loss, a factor in optical loss in optical fibers, is correct? It is a loss caused by light scattering due to fluctuations in refractive index, which occur because the refractive index differs slightly depending on the location due to changes in the density of the glass in the optical fiber. [Question] R06-A-25 Which of the following statements regarding wireless LAN standards is incorrect? IEEE802.11a uses radio waves in the 2.4GHz band and employs a direct spread spectrum method. [Question] R06-A-26 Which of the following statements regarding antennas used in wireless communication is incorrect? An offset parabolic antenna improves sidelobe characteristics by placing the primary radiator in front of the parabolic reflector that serves as the transmission path. *While every effort has been made to ensure the accuracy of points and other information within the app, we cannot guarantee its accuracy. Please note that we assume no responsibility for any inconvenience or disadvantage caused by the use of this app. *The content within the app may be added, updated, changed, or modified without prior notice.