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2024 (Reiwa 6) 1st to 2010 (Heisei 210) 1st class electrical work construction management engineer department past questions
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[Example problem]
R5 (primary)-4
Which of the following is an inappropriate statement regarding the operating principle of an indicating electric meter?
Inductive instruments are instruments that operate by the action of electrostatic force between a fixed electrode and a movable electrode.
R5 (primary)-6
Which of the following is the most inappropriate description regarding generators?
Induction generators generally have complicated structures and are expensive.
R5 (1st order)-8
Which of the following is the most inappropriate statement regarding high-voltage phase advance capacitors?
Foil electrode (NH) capacitors have a self-healing function.
R5 (primary)-9
Which of the following is correct regarding the flow rate [m3/s] required to generate a maximum output of 147 MW at a hydroelectric power plant? However, the effective head is assumed to be 250 m, and the total efficiency of the turbine efficiency and generator efficiency is assumed to be 80%.
R5 (primary)-10
Which of the following is the most inappropriate description regarding the components of a substation?
Zinc oxide type arresters require a series gap.
R5(1st)-11
Which of the following is the most inappropriate statement regarding electromagnetic induced voltage on communication lines that are close to overhead power transmission lines?
The size will increase if an overhead ground wire with high conductivity is installed.
R5 (primary)-12
Which of the following is the most inappropriate description regarding a power source connected to the power system?
Wind power generation is used as peak supply power because its output can be easily adjusted to meet demand.
R5(1st)-13
Which of the following statements regarding indoor lighting is inappropriate?
The light color of a light source with a correlated color temperature of less than 5300K is classified as cool.
R5 (primary)-14
Which term is most appropriate for the following sentence regarding electrolytic deposition of metals? ``If a metal plate containing impurities is used as an anode and electrolysis is performed in a solution containing metal ions, pure metal will be deposited on the cathode, yielding highly pure metal.''
electrolytic refining
R5 (primary)-15
Which of the following is the most inappropriate statement regarding a three-phase induction motor?
Slip is the synchronous speed divided 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 steam power generation using a steam turbine?
However, the power generation equipment will have the same capacity.
Changes in atmospheric temperature have little effect on output.
R5(1st)-17
Which statement regarding polymer electrolyte fuel cells is inappropriate?
Carbon monoxide can be used as fuel.
R5(1st)-18
Which of the following is the most inappropriate description regarding oil-immersed transformers installed in substations?
Increasing the magnetic flux density of the iron core is effective as a noise countermeasure.
R5(1st)-19
Which of the following is the most inappropriate for the purpose of installing a protection relay system to prevent the spread of accidents to prevent the effects of local power system failures from spreading to the entire system?
Busbar protection
R5 (primary)-20
Which of the following is the most inappropriate statement regarding measures to improve power system supply reliability?
Periodic inspections of equipment should be scheduled to be averaged throughout the year, regardless of the light or heavy load.
R5(1st)-21
Which of the following is the most inappropriate description regarding galloping on overhead power transmission lines?
This is a phenomenon where ice and snow adhering to electric wires fall off and the electric wires jump up due to the reaction.
R5(1st)-23
Which of the following is an inappropriate description regarding the skin effect of power transmission lines?
The larger the skin effect, the larger the current density at the center of the wire.
R5 (primary)-24
Which of the following is inappropriate as a measure to suppress corona discharge on overhead power transmission lines?
In the case of multiple conductors, reduce the number of elementary conductors.
R5 (primary)-25
Which of the following is the most inappropriate statement regarding the protection of power distribution systems?
Overcurrent relays are installed in substations to protect high-voltage distribution lines from ground faults.
R5 (primary)-26
Regarding the definition of terms related to grid-connected equipment for distributed power sources, which of the following is incorrect in "Technical Standards for Electrical Equipment and Their Interpretation"?
A transfer circuit breaker is a device that transmits a circuit breaker circuit breaker's circuit breaker signal over a communication line to operate another circuit breaker installed in the same premises.
R5(1st)-27
Which of the following is the most inappropriate statement regarding measures to suppress voltage flicker occurring in power distribution systems?
Install a step automatic voltage regulator (SVR) on the power side of the source.
R5(1st)-28
Which of the following is an inappropriate statement regarding illuminance calculation using the luminous flux method for general indoor lighting?
The larger the room index, the lower the illuminance.
R5(1st)-29
Regarding floor heating installed indoors, which of the following is inappropriate in terms of "technical standards for electrical equipment and their interpretation"?
The temperature of the heating wire was set so as not to exceed 120℃.
R5 (primary)-30
Regarding the performance, etc. of overcurrent circuit breakers installed in low-voltage power lines, which of the following is inappropriate in terms of "technical standards for electrical equipment and their interpretation"?
However, the low-voltage line shall be a low-voltage branch circuit leading only to the motor.
A circuit breaker for short-circuit protection shall not operate within 0.2 seconds at a current 1.2 times the setting current.
R5 (primary)-31
Based on the "Technical Standards for Electrical Equipment and Their Interpretation," which of the following is appropriate as the minimum allowable current [A] required for the low-voltage indoor trunk line that connects the following loads A and A?
A. Total rated current of the motor: 80A
A Total peak rated current: 60A
148A
R5 (primary)-32
Which of the following statements regarding equipment used in high-voltage power receiving and substation equipment is inappropriate?
The terminal voltage of a phase advance capacitor is lower than the circuit voltage when a series reactor is used.
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 a switchgear on the primary side of the transformer.
R5 (primary)-34
Which of the following is an inappropriate statement regarding a low-voltage spot network system that receives electricity through three lines?
The protector fuse is installed on the primary side of the network transformer.
R5 (primary)-35
Which of the following is the most inappropriate statement regarding the cooling system for diesel engines used in private power generation equipment?
Direct-coupled radiator cooling systems cannot be operated if makeup water is cut off due to an earthquake, etc.
R5 (primary)-36
Which of the following statements regarding stationary lead-acid batteries is inappropriate according to the Japanese Industrial Standards (JIS)?
Valve-controlled lead-acid batteries are storage batteries that release gas under normal conditions, but become 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 in terms of "technical standards for electrical equipment and their interpretation"?
When installing an earth leakage breaker that shuts off the circuit in one second when a ground fault occurs in a low-voltage line, the grounding resistance value of class C grounding work can be set to 500Ω.
R5(1st)-38
Which of the following is the most inappropriate description regarding the functions of a central supervisory control unit?
Trend display displays equipment system diagrams and floor plans on a display device, and displays equipment status and alarms by changing the color or blinking symbols.
R5(1st)-39
According to the Fire Service Act, which of the following statements regarding automatic fire alarm equipment is inappropriate?
The 3rd and 4th floors of the office building each had a floor area of 500 m2, so they were combined into one warning area.
R5 (primary)-40
Regarding emergency lighting equipment (lighting equipment), which of the following is incorrect according to the Building Standards Act?
Horizontal illuminance of 5㏓ or more must be ensured on the floor of the underground passage where each structure of the underground shopping mall touches.
R5(1st)-41
Which of the following is the most inappropriate statement regarding microphone selection?
A bidirectional microphone was selected to collect sounds from all directions around the room.
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