SSW2 Electric and electronic equipment assembly 1
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1. 問題(もんだい): 圧縮成形(あっしゅくせいけい)における成形不良(せいけいふりょう)の現象(げんしょう)と原因(げんいん)に関する記述(きじゅつ)として、誤(あやま)っているものを選(えら)びなさい。
[不良現象(ふりょうげんしょう)] [原因(げんいん)]
Question: Select the incorrect statement regarding the phenomena and causes of molding defects in compression molding.
Options:
Explanation:Surface wrinkles are caused by the mold temperature being too high. If the temperature is too low, flow defects or insufficient filling may occur, but wrinkles are caused by high temperatures. Therefore, D is incorrect.
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2. 問題(もんだい): 次 (つぎ) の包装用語 (ほうそうようご) のうち、日本産業規格 (にほんさんぎょうきかく) (JIS) において、側支柱 (そえちちゅう) 又 (また) は側桟 (そえさん) の補強 (ほきょう) として内側 (うちがわ) に取 (と) り付 (つ) け、上部荷重 (じょうぶかじゅう) を支 (ささ) える部材 (ぶざい) と定 (さだ) められているものを選 (えら) びなさい。
Question: Among the following packaging terms, choose the one defined in the Japanese Industrial Standards (JIS) as a member attached to the inside as a reinforcement for side posts or side rails to support top loads.
Explanation:An auxiliary post (Soebashira) is attached to the inside as reinforcement for side posts or side rails and is a member that supports the top load. A beam (Hari) is a member that supports the ceiling, load-bearing floor material is flooring that receives the load, and a header refers to a member at the end.
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3. 問題(もんだい): やすり仕上げ (しあげ) に関 (かん) する記述 (きじゅつ) として、誤 (あやま) っているものはどれか。
Question: Which of the following statements regarding filing is incorrect?
Explanation:
The incorrect statement is D.
Reason:Files are usually tools used dry, andapplying oil makes it easier for chips to clog the teeth, reducing the cutting performance.Therefore, the statement "apply oil to improve the bite" is incorrect.
About other options:
Therefore, the correct answer is D.
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4. 問題(もんだい): 不飽和(ふわ)ポリエステル樹脂(じゅし)の硬化(こうか)に関する記述(きじゅつ)として、正(ただ)しいものを選(えら)びなさい。
Question: Select the correct statement regarding the curing of unsaturated polyester resin.
Explanation:Curing of unsaturated polyester resin progresses by a polymerization reaction at room temperature by adding a curing agent (usually MEKP, etc.) and an accelerator (cobalt, etc.). Heating may be used to increase the curing speed, but it is not a mandatory condition.
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5. 問題(もんだい):中間 (ちゅうかん) ばめの説明 (せつめい) として、適切 (てきせつ) なものはどれか。
Question: Definition of transition fit.
A transition fit is a fit where the tolerance zones of the hole and the shaft overlap, so that depending on the actual combination of parts, either "clearance" or "interference" can occur.
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6. 問題(もんだい):
下記(かき)のうち、真直(しんちょく)度(ど)を考慮(こうりょ)した穴(あな)の検査(けんさ)に最も(もっとも)適した(てきした)測定(そくてい)器(き)はどれか。
Question: Which measuring instrument is most suitable for inspecting a hole while considering its straightness?
A plug gauge (GO side) is suitable for "virtual condition" inspection, which comprehensively checks whether the mating part will fit, considering not only the minimum diameter of the hole but also its curvature (straightness) and tilt. Cylinder gauges and micrometers measure dimensions at "points" or "lines," making them unsuitable for determining the overall straightness of a hole.
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7. 問題(もんだい): 押出機(おしだしき)のシリンダ内面(ないめん)とスクリュー外面(がいめん)の表面硬度(ひょうめんこうど)に関する記述(きじゅつ)として、正しいものを選(えら)びなさい。
Question: Select the correct statement regarding the surface hardness of the inner surface of the cylinder and the outer surface of the screw in an extruder.
Explanation:In an extruder, the hardness of the inner surface of the cylinder is set higher than the hardness of the outer surface of the screw. This is to minimize wear on the cylinder side and ensure a long service life. This is because screws are relatively easy to replace, while cylinders are difficult to replace.
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8. 問題(もんだい):電気系統(でんきけいとう)の遅(おく)れ力率(りきりつ)を改善(かいぜん)することを目的(もくてき)に用(もち)いられる機器(きき)として、正(ただ)しいものはどれか。
Question: Which of the following devices is correctly used for the purpose of improving the lagging power factor in an electrical system?
To improve a lagging power factor, a "power capacitor" that carries leading current is connected in parallel to the circuit. A shunt reactor is used, conversely, to improve a leading power factor (such as preventing the Ferranti effect).
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9. 問題(もんだい): 変圧器内部異常 (へんあつきないぶいじょう) で発生 (はっせい) するアセチレンガス (ガス) を表 (あらわ) す化学記号 (かがくきごう) を選 (えら) びなさい。
Question: Select the chemical symbol for acetylene gas generated by internal transformer abnormalities.
Choices:
Explanation:Acetylene gas (C₂H₂) is a gas produced when high-energy abnormalities such as arc discharge occur inside a transformer. It is one of the important diagnostic gases in dissolved gas analysis.
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10. 問題(もんだい):自動 (じどう) はんだ付 (づ) け装置 (そうち) (フローソルダリング)の工程順序 (こうていじゅんじょ) として、正 (ただ) しいものはどれか。
Question: Which of the following is the correct process sequence for an automatic soldering machine (flow soldering)?
The correct procedure for flow soldering is:
1. Flux application: Removes oxides from the joints and improves wettability.
2. Preheating: Evaporates the flux solvent and reduces thermal shock.
3. Soldering: Dipping into molten solder.
4. Cooling: Solidifying the solder.
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11. 問題(もんだい):自動現像機(じどうげんぞうき)における作業工程(さぎょうこうてい)として、正しいものを選(えら)びなさい。
Question: Choose the correct work steps for an automatic developing machine.
Explanation:In the development process for photolithography or resists, first, unnecessary parts are dissolved by "developing," then the image is stabilized by "fixing," followed by rinsing away chemicals with "washing," and finally completed by "drying." This sequence is the standard process flow.
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12. 問題(もんだい): スプレー塗装(とそう)において、塗料(とりょう)の粘度(ねんど)が高(たか)すぎることによって発生(はっせい)する塗膜欠陥(とまくけっかん)を選(えら)びなさい。
Question: Select the coating film defect caused by the viscosity of the paint being too high in spray painting.
Explanation:If the paint viscosity is too high, the paint particles will not spread sufficiently when sprayed, resulting in unevenness like an orange peel. It is important to dilute to an appropriate viscosity.
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13. 問題(もんだい):ある軟鋼丸棒(なんこうまるぼう)に、1 000 Nの引張荷重(ひっぱりかじゅう)が作用(さよう)したときに生(しょう)じる応力(おうりょく)を20 N/mm²としたときに、この丸棒(まるぼう)の直径(ちょっけい)として次(つぎ)のうち最も近(ちか)い値(あたい)はどれか。
Question: When the tensile load is 1000 N and the stress is 20 N/mm², what is the value closest to the diameter of the round bar?
Stress is expressed by the following formula:
σ = F / A
Substituting the given values:
20 = 1000 / A
Thus,
A = 1000 / 20 = 50 mm²
The area of a circular cross-section is:
A = π(d/2)² = πd² / 4
Therefore,
50 = πd² / 4 → d² = 200 / π ≈ 63.69
d ≈ √63.69 ≈ 7.98 mm
Since the closest value is 8 mm,the correct answer is B.
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14. 問題(もんだい): 下図(かず)の中(なか)の「25」の寸法表示(すんぴょうひょうじ)に関する記述(きじゅつ)として、正しい(ただしい)ものを選(えら)びなさい。
Question: Choose the correct description regarding the dimension display 「25」 in the figure below.
Explanation:When a dimension value has a frame (rectangular frame) in a drawing, it indicates a "reference dimension." Reference dimensions are provided for information or when the graphic and dimension value are not proportional. The correct answer is D (reference dimension), but option B is designated as the correct answer.
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15. 問題(もんだい):ガラスチョップドストランドマット(EM450)と、ガラスロービングクロス(ERC570)を組み合わせ(くみあわせ)た構成(こうせい)の場合(ばあい)の一般的(いっぱんてき)なガラス含有率(がんゆうりつ)として、最も(もっとも)近い(ちかい)ものはどれか。
Question: What is the closest general glass content for a configuration combining glass chopped strand mat (EM450) and glass roving cloth (ERC570)?
In hand lay-up molding, the glass content (Gc) of chopped strand mat alone is about 30%, and roving cloth alone is about 50%. In a configuration where these are combined alternately, the general design value is around the average of 40% (40±5wt.%).
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16. 問題(もんだい): 日本産業規格 (にほんさんぎょうきかく) (JIS) によれば、次 (つぎ) の包装貨物 (ほうそうかもつ) の荷扱 (にさば) い図記号 (ずきごう) のうち、包装 (ほうそう) の4 (よっ) つの側面 (そくめん) すべてに表示 (ひょうじ) しなくてもよいものを選 (えら) びなさい。
Question: According to the Japanese Industrial Standards (JIS), select the handling symbol for packaged cargo that does not necessarily have to be displayed on all four sides of the package.
Explanation:In the JIS handling symbols, symbols indicating handling precautions such as "Fragile" or "This way up (UP)" are desired to be displayed on all four sides of the package so that workers can see them from any direction.On the other hand, "No forklifts" is a symbol to indicate specific sides or directions where forklift entry is prohibited, and it is sufficient to display it on the necessary sides. Therefore, the one that does not need to be displayed on all four sides is "B. No forklifts."
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17. 問題(もんだい):無電解銅(むでんかいどう)めっき液(えき)の組成(そせい)におけるロッシェル塩(えん)の役割(やくわり)として、正(ただ)しいものを選(えら)びなさい。
Question: Select the correct role of Rochelle salt in the composition of electroless copper plating solutions.
Explanation:Rochelle salt (potassium sodium tartrate) plays a role in chelating copper ions in electroless copper plating solutions. It is used to prevent copper ions from precipitating as hydroxides in alkaline solutions and to allow the plating reaction to proceed stably. Formalin or similar substances are used as reducing agents.
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18. 問題(もんだい):銅(どう)スルーホール基板(きばん)の製造方法(せいぞうほうほう)で、めっきスルーホール形成法(けいせいほう)に当(あ)てはまらないものを選(えら)びなさい。
Question: Select the method that does not belong to the plating through-hole formation methods for manufacturing copper through-hole printed circuit boards.
Explanation:Plating through-hole formation methods include the solder stripping method, tenting method, and hole plugging method. The copper paste printing method is a technique for forming through-holes using conductive paste rather than plating, so it is not classified as a plating through-hole formation method.
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19. 問題(もんだい): 塗装(とそう)仕上(しあげ)検査(けんさ)において、外観(がいけん)検査(けんさ)項目(こうもく)として適切(てきせつ)でないものを選(えら)びなさい。
Question: In the paint finish inspection, select the item that is not appropriate as an appearance inspection item.
Explanation:Appearance inspection is an inspection to check color, gloss, smoothness, dirt, and contamination of foreign objects by visual observation or a gloss meter. Adhesion is a performance test to examine how well the coating film adheres to the substrate and is not included in the appearance inspection items.
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20. 問題(もんだい):ブロー成形用金型(せいけいようかながた)の日常管理(にちじょうかんり)に関する記述(きじゅつ)として、適切(てきせつ)でないものを選(えら)びなさい。
Question: Select the inappropriate statement regarding the daily maintenance of blow molding molds.
Explanation:Even if there are no visible scratches, O-rings and packings used for a long period lose their elasticity and sealing performance due to aging. Therefore, replacement with new parts is the general rule during overhaul inspections. It is inappropriate to reuse them just because no scratches are found.
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21. 問題(もんだい):灯油(とうゆ)ポリタンク等(とう)の大形成形品(おおかたせいけいひん)の生産(せいさん)に、最も適(もっ)しているものを選(えら)びなさい。
Question: Select the most suitable method for producing large molded products such as kerosene plastic tanks.
Explanation:An extrusion blow molding machine with an accumulator is most suitable for producing large molded products like kerosene plastic tanks. Because the accumulator (pressure storage device) can accumulate a large amount of molten resin at once and extrude it in a short time, it can form a uniform parison even for large and thick-walled products.
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22. 問題(もんだい): 塗装作業(とそうさぎょう)で使用(しよう)する養生用品(ようじょうようひん)でないものを選(えら)びなさい。
Problem: Select the item that is NOT a masking supply used in painting work.
Explanation:Joint tape is a material for connecting vinyl sheets and is not a direct masking supply. Masking tape, vinyl sheets, and anti-scattering nets are all used directly for painting protection (masking).
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23. 問題(もんだい):
QC7つ道具(どうぐ)に含まれ(ふくまれ)ないものはどれか。
Question: Which of the following is not included in the 7 QC Tools?
The 7 QC Tools are the Pareto chart, cause-and-effect diagram, graph, check sheet, histogram, scatter diagram, and control chart. The FT diagram (Fault Tree Analysis diagram) is a reliability analysis method and is not included in the 7 QC Tools.
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24. 問題(もんだい): 消防法 (しょうぼうほう) 関係法令 (かんけいほうれい) によれば、製造所等 (せいぞうしょとう) における危険物 (きけんぶつ) の貯蔵 (ちょぞう) 又 (また) は取扱い (とりあつかい) に関する記述 (きじゅつ) として、誤 (あやま) っているものを選 (えら) びなさい。
Problem: According to the Fire Service Act and related regulations, select the incorrect statement regarding the storage or handling of hazardous materials at manufacturing plants, etc.
Explanation:Hazardous materials accumulated in storage facilities or oil separators must be properly pumped out. It is dangerous to leave them. All other options are appropriate handling methods for hazardous materials as stipulated by the Fire Service Act.
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25. 問題(もんだい):はんだ付(づ)け作業(さぎょう)に使用(しよう)するフラックスの作用(さよう)として、誤(あやま)っているものを選(えら)びなさい。
Question: Choose the incorrect action of flux used in soldering work.
Explanation:The main actions of flux are: 1) Cleaning action to remove oxides from the metal surface, 2) action to lower the surface tension of the solder and improve wettability, and 3) action to prevent re-oxidation during heating. Conductive action is not a role of flux. In fact, flux residues often have insulating properties.
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26. 問題(もんだい):高圧同期電動機 (こうあつどうきでんどうき) の絶縁 (ぜつえん) に関 (かん) する記述 (きじゅつ) として、誤 (あやま) っているものはどれか。
Problem: Incorrect description regarding the insulation of high-voltage synchronous motors.
Insulation resistance measurement (megger test) is for checking the insulation state between the circuit and the "ground." It cannot detect "layer shorts (inter-turn short circuits)," which are short circuits inside the windings. To confirm layer shorts, a separate test using a layer short tester or similar is required.
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27. 問題(もんだい):下図(かず)の回路(かいろ)で、A・B間(かん)の電圧(でんあつ)が20VであったときのA・C間の電圧として、正しいものを選(えら)びなさい。ただし、使用(しよう)する電圧計(でんあつけい)の内部抵抗(ないぶていこう)は、無限大(むげんだい)とします。
Question: In the circuit below, select the correct voltage between A and C when the voltage between A and B was 20 V. However, assume that the internal resistance of the voltmeter used is infinite.
Calculation Procedure:
Explanation:In a series circuit, voltage is distributed in proportion to the resistance value. Since the resistance ratio of 50 Ω and 200 Ω is 1:4, if A-B is 20 V, then B-C is 80 V. Therefore, A-C is 100 V.
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28. 問題(もんだい):単線接続図(たんせんせつぞくず)に関(かん)する記述(きじゅつ)として、適切(てきせつ)でないものはどれか。
Problem:Which of the following descriptions concerning single-line diagrams is inappropriate?
Options:
Explanation:
A single-line diagram is intended to simplify and show the configuration of power systems or main circuits. Detailed indications of operation methods and sequences (such as interlocks) are the role of the "skeleton diagram (sequence diagram)".
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29. 問題(もんだい): パーティングライン (PL) に関する記述(きじゅつ)として、誤(あやま)っているものを選(えら)びなさい。
Question: Select the incorrect statement regarding the parting line (PL).
Explanation:It is necessary to provide air vents on the parting line to allow air inside the mold to escape. Without air vents, defects such as gas burns or short shots will occur in the molded product. All other options are correct statements.
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30. 問題(もんだい): あるコンデンサに 200 V で、50 Hz の 正弦波交流(せいげんはこうりゅう)電圧(でんあつ)を加(くわ)えた 場合(ばあい)に、0.314 A の 電流(でんりゅう)が 流(なが)れた。このコンデンサの 静電容量(せいでんようりょう)C として、正(ただ)しいものを選(えら)びなさい。
ただし、円周率(えんしゅうりつ) (π) は 3.14 とします。
Question: When a sinusoidal AC voltage of 200 V at 50 Hz is applied to a capacitor, a current of 0.314 A flows. Select the correct capacitance C for this capacitor.Note: Use 3.14 for pi (π).
Explanation:First, find the capacitive reactance XC.
XC = V / I = 200 / 0.314 ≈ 637 Ω
Next, find the capacitance using C = 1 / (2πfXC).
C = 1 / (2 × 3.14 × 50 × 637) ≈ 5.0 × 10⁻⁶ F = 5 μF
Therefore, the correct answer is B. 5 μF.
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