1級電気工事施工管理技士学科過去問/令和7年1次～平成22年 vVARY

Past questions for the 1st-class electrical engineering construction management technician course from 2025 (Reiwa 7) 1st to 2010 (Heisei 22)

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*This includes the 1st test of Reiwa 7, 1st test of Reiwa 6, 1st test of Reiwa 5, 1st test of Reiwa 4, 1st test of Reiwa 3, 2020, 201, 2018, 2017, 2016, 2015, 2014, 2013, 2012, 2011, and 2010.
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[Example Question]
R5 (1st)-4
Which of the following is an inappropriate description of the operating principle of an indicating electric meter?
An induction meter is an instrument that operates by the action of electrostatic force generated between a fixed electrode and a movable electrode.
R5 (primary)-6
Which of the following is the least appropriate statement regarding generators?
Induction generators are generally complex in structure and expensive.
R5 (primary)-8
Which of the following is the least appropriate statement regarding high-voltage phase-advance capacitors?
Null electrode (NH) capacitors have a self-healing function.
R5 (primary)-9
Which of the following is the correct flow rate [m3/s] required to generate a maximum output of 147 MW at a hydroelectric power plant? However, the effective head is 250 m, and the combined efficiency of the turbine efficiency and generator efficiency is 80%.
R5 (primary)-10
Which of the following is the least appropriate statement regarding the components of a substation?
A series gap is required for zinc oxide surge arresters.
R5(primary)-11
Which of the following is the least appropriate statement regarding electromagnetic induction voltages on communication lines in close proximity to overhead transmission lines?
The voltage increases when an overhead ground wire with high conductivity is installed.
R5(primary)-12
Which of the following is the least appropriate statement regarding power sources connected to the power grid?
Wind power generation is used as a peak supply because it is easy to adjust the output to match demand.
R5(primary)-13
Which of the following is the least appropriate statement regarding indoor lighting?
Light sources with a correlated color temperature of less than 5300K are classified as cool colors.
R5(primary)-14
Which of the following is the most appropriate term for the following statement regarding electrolytic deposition of metals? "When electrolysis is performed in a solution containing metal ions using a metal plate containing impurities as the anode, pure metal is deposited on the cathode, resulting in a highly pure metal."
Electrolytic refining
R5(primary)-15
Which of the following is the least appropriate statement regarding three-phase induction motors?
Slip is calculated by dividing the synchronous speed by the difference between the synchronous speed and the rotor speed.
R5(primary)-16
Which of the following is an inappropriate statement regarding combined cycle power generation compared to thermal power generation using steam turbines?
However, the power generation equipment is assumed to have the same capacity.
Changes in atmospheric temperature have a small effect on output.
R5(primary)-17
Which of the following is an inappropriate statement regarding polymer electrolyte fuel cells?
Carbon monoxide can be used as fuel.
R5(primary)-18
Which of the following is the least appropriate statement regarding oil-immersed transformers installed in substations?
Increasing the magnetic flux density of the iron core is an effective noise control measure.
R5(primary)-19
Which of the following is the least appropriate purpose for installing a fault propagation prevention relay system to prevent the effects of a localized fault in a power system from spreading to the entire system?
Busbar protection
R5(primary)-20
Which of the following is the least appropriate statement regarding measures to improve the reliability of power system supply?
Regular inspections of equipment should be scheduled to be averaged throughout the year, regardless of the load.
R5(primary)-21
Which of the following is the least appropriate statement regarding galloping of overhead transmission lines?
This is a phenomenon in which ice and snow attached to the wire falls off, causing the wire to bounce up in reaction.
R5(primary)-23
Which of the following is the least appropriate statement regarding the skin effect of transmission lines?
The greater the skin effect, the greater the current density in the center of the wire.
R5(primary)-24
Which of the following is the least appropriate measure to suppress corona discharge in overhead transmission lines?
In the case of multiple conductors, reduce the number of conductors.
R5(primary)-25
Which of the following is the least appropriate statement regarding the protection of power distribution systems?
To protect high-voltage distribution lines from ground faults, an overcurrent relay is installed at the substation.
R5 (primary)-26
Which of the following definitions of terms related to distributed power system interconnection equipment is incorrect according to "Technical Standards for Electrical Equipment and Their Interpretations"?
A transfer circuit breaker is a device that transmits a circuit breaker's interruption signal over a communication line and operates another circuit breaker installed in the same premises.
R5 (primary)-27
Which of the following statements regarding measures to suppress voltage flicker that occurs in a distribution system is the most inappropriate statement.
A step-type automatic voltage regulator (SVR) is installed on the power source side of the source.
R5 (primary)-28
Which of the following statements regarding illuminance calculations for indoor general lighting using the luminous flux method is inappropriate?
The higher the room index, the lower the illuminance.
R5 (primary)-29
Which of the following statements regarding floor heating installed indoors is inappropriate according to "Technical Standards for Electrical Equipment and Their Interpretations"?
The temperature of the heating wire was installed so as not to exceed 120°C.
R5 (primary)-30
Which of the following statements regarding the performance of an overcurrent circuit breaker installed in a low-voltage circuit is inappropriate according to the "Technical Standards for Electrical Equipment and Their Interpretations"?
However, the low-voltage circuit is a low-voltage branch circuit that only leads to an electric motor.
A circuit breaker dedicated to short-circuit protection must not operate within 0.2 seconds at a current 1.2 times the settling current.
R5 (primary)-31
Which of the following statements regarding the minimum allowable current [A] required for the low-voltage indoor trunk line connecting the following loads A and B is appropriate according to the "Technical Standards for Electrical Equipment and Their Interpretations"?
A. Total rated current of the motors: 80A
B. Total peak rated current: 60A
148A
R5 (primary)-32
Which of the following statements regarding equipment used in high-voltage substation facilities is inappropriate?
When a series reactor is used, the terminal voltage of a leading-phase capacitor is lower than the circuit voltage.
R5 (primary)-33
Which of the following statements regarding cubicle-type high-voltage power receiving equipment is inappropriate according to the Japanese Industrial Standards (JIS)?
If the transformer capacity is 500 kV/A, a high-voltage cutout can be used as the switchgear on the primary side of the transformer.
R5 (primary)-34
Which of the following statements regarding the low-voltage spot network system that receives power through three lines is inappropriate?
Protector fuses are installed on the primary side of the network transformer.
R5 (primary)-35
Which of the following statements regarding the cooling method for diesel engines used in private power generation equipment is the most inappropriate?
With the direct radiator cooling system, operation becomes impossible if the make-up water supply is cut off due to an earthquake or other reason.
R5 (primary)-36
Which of the following statements regarding stationary lead-acid batteries is inappropriate according to the Japanese Industrial Standards (JIS)?
A valve-regulated lead-acid battery is a storage battery that releases gas under normal conditions, but becomes sealed when the internal pressure exceeds a specified value.
R5 (primary)-37
Which of the following statements regarding grounding work in steel-framed buildings is inappropriate under the "Technical Standards for Electrical Equipment and Their Interpretations"?
When installing a leakage current breaker that cuts off the power in one second when a ground fault occurs in a low-voltage line, the ground resistance value of Class C grounding work can be set to 500 Ω.
R5 (primary)-38
Which of the following statements regarding the functions of a central monitoring and control device is the most inappropriate?
Trend display displays equipment system diagrams and floor plans on a display device, and indicates equipment status and alarms by changing the color or blinking of symbols.
R5 (primary)-39
Which of the following statements regarding automatic fire alarm systems is inappropriate under the "Fire Service Act"?
The floor area of the third and fourth floors of an office building was 500 m2 each, so they were combined to form one alert area.
R5 (1st)-40
Which of the following statements regarding emergency lighting equipment (lighting facilities) is incorrect under the Building Standards Act?
The floor of the underground passageway where each structure of the underground mall is adjacent must have a horizontal illuminance of 5 ㎓ or more.
R5 (1st)-41
Which of the following statements regarding microphone selection is the most inappropriate?
A bidirectional microphone was selected to collect sound from all surrounding directions.

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