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Industrial Manufacturing - Machinery and Electronics sample exam questions – 10 questions with answers
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10 sample questions in the real exam format, with furigana, English translation, answers and explanations. Tap "Show answer" under each question. For the full question bank and realistic mock exams, open the free app.
Question 1
作業の前に行う指差呼称の目的は、確認対象を指で差し、声に出して確認することでミスを防ぐことである。
The purpose of pointing and calling (shisa koshou) before starting work is to point at the target object, call out loud to confirm it, and prevent mistakes.
- A. ○
○ True - B. ×
× False
Show answer
Correct answer: A
This statement is true. Pointing and calling focuses your attention on the target object, verifies its condition, and prevents human error before acting.
| Word | Meaning |
|---|---|
| 作業 | work, operation |
| 指差呼称 | pointing and calling |
| 目的 | purpose |
Question 2
ノギスを使って測定できるものの組み合わせは、回路の電圧・電流・電気抵抗の値である。
The combination of quantities that can be measured using vernier calipers is the voltage, current, and electrical resistance of a circuit.
- A. ○
○ True - B. ×
× False
Show answer
Correct answer: B
This statement is false. Vernier calipers measure physical dimensions of a workpiece—outside diameter, inside diameter, depth, and step. Voltage, current, and electrical resistance are measured with a multimeter (tester).
| Word | Meaning |
|---|---|
| 使う | use |
| 測定 | measurement |
| 組み合わせ | combination, set |
Question 3
ボール盤で穴あけ作業をするとき、安全のための正しい行動はどれですか。
When drilling holes with a drill press, which is the correct action for safety?
- A. 切りくずで手を傷つけないよう、軍手を着けてハンドルを操作する。
Wear cotton work gloves while operating the feed handle to avoid cutting your hands on chips. - B. 薄い板材は貫通時に動きにくいため、テーブル上で手で押さえる。
Hold thin sheet metal by hand on the table since it rarely shifts when the drill breaks through. - C. ドリルに絡んだ長い切りくずは、回転数を下げて素手で取り除く。
Lower the spindle speed and remove long chips tangled on the drill with bare hands. - D. 手袋をつけず、工作物をバイスなどで確実に固定する。
Do not wear gloves, and fix the workpiece firmly with a vise or similar tool.
Show answer
Correct answer: D
When using a drill press, gloves can easily catch and wrap around the rotating drill bit, so never wear gloves and always clamp the workpiece securely in a vise or fixture. Thin sheet metal is especially prone to catching and spinning as the drill breaks through, so holding it by hand is dangerous. To remove tangled chips, stop the spindle completely and use a brush or hook rather than merely slowing it down and using bare hands.
| Word | Meaning |
|---|---|
| ボール盤 | drill press |
| 穴あけ | drilling holes |
| 作業 | work, operation |
| 安全 | safety |
Question 4
職場の5Sとは、「整理・整頓・清掃・清潔・しつけ」の5つである。
Workplace 5S consists of five elements: 'Seiri (Sort), Seiton (Set in order), Seisou (Shine), Seiketsu (Standardize), and Shitsuke (Sustain)'.
- A. ○
○ True - B. ×
× False
Show answer
Correct answer: A
This statement is true. Workplace 5S consists of Seiri (Sort), Seiton (Set in order), Seisou (Shine/Clean), Seiketsu (Standardize/Keep clean), and Shitsuke (Sustain/Discipline).
| Word | Meaning |
|---|---|
| 職場 | workplace |
| 整理 | seiri (sort) |
| 整頓 | seiton (set in order) |
| 清掃 | seiso (clean) |
Question 5
研削作業で、飛散する切りくずや砥粒から目を守るためには、耐衝撃性のある保護めがねではなく日常用のサングラスを着用する。
In grinding work, to protect your eyes from flying chips and abrasive grains, you should wear everyday sunglasses rather than impact-resistant safety glasses.
- A. ○
○ True - B. ×
× False
Show answer
Correct answer: B
This statement is false. During grinding work, chips and abrasive grains fly off at high speed, so impact-resistant safety glasses must be worn. Everyday sunglasses lack adequate impact resistance and side shielding.
| Word | Meaning |
|---|---|
| 研削作業 | grinding work |
| 飛散 | flying, scattering |
| 切りくず | chips |
| 砥粒 | abrasive grains |
Question 6
図の場面のように、旋盤で加工した後の切りくずの処理として、正しいものはどれですか。
In the scene shown in the figure, which is the correct way to deal with chips after machining on a lathe?
- A. 機械が回転中に、厚手の革手袋をはめた手で切りくずを引き抜く。
While the machine is rotating, pull out the chips using a hand wearing thick leather gloves. - B. 機械を止めてから、ブラシやフックなどの道具で取り除く。
Stop the machine first, then remove them with a tool such as a brush or hook. - C. 回転中のチャックから離れた位置であれば、素手で切りくずを払いのける。
Brush the chips away with bare hands as long as you are away from the rotating chuck. - D. 刃物台に付着した細かい切りくずは、圧縮空気で強く吹き飛ばす。
Blow away fine chips stuck to the tool post strongly with compressed air.
Show answer
Correct answer: B
The figure shows sharp spiral metal chips tangled around the chuck and workpiece on a lathe. Because lathe chips are sharp and hot, you must stop the machine completely first and remove them with a tool such as a brush or hook, never with bare hands, gloves while rotating, or compressed air.
| Word | Meaning |
|---|---|
| 旋盤 | lathe |
| 切りくず | chips (from cutting) |
| 処理 | handling, disposal |
| 回転中 | while rotating |
| 素手 | bare hands |
Question 7
10Ωと20Ωの抵抗を直列につなぎました。合成抵抗はいくらですか。
A 10 ohm resistor and a 20 ohm resistor are connected in series. What is the combined resistance?
- A. 逆数から求めた約6.7Ω
About 6.7 ohms found from reciprocals - B. 平均値である15Ω
15 ohms, which is the average value - C. 2つの和である30Ω
30 ohms, which is the sum of the two - D. 2つの積である200Ω
200 ohms, which is the product of the two
Show answer
Correct answer: C
In a series connection, the combined resistance equals the sum of the individual resistances: 10 + 20 = 30 ohms. About 6.7 ohms found from reciprocals is the parallel resistance, 15 ohms is the average value, and 200 ohms is the product of the two values.
| Word | Meaning |
|---|---|
| 抵抗 | resistance |
| 直列 | series |
| 合成抵抗 | combined resistance |
Question 8
切削油を使う主な目的は、摩擦や熱を減らし、工具の摩耗を防いで切りくずを洗い流すことである。
The main purpose of using cutting oil is to reduce friction and heat, prevent tool wear, and wash away chips.
- A. ○
○ True - B. ×
× False
Show answer
Correct answer: A
This statement is true. Cutting oil lubricates to reduce friction, cools to remove cutting heat, protects the tool from wear, and flushes away chips.
| Word | Meaning |
|---|---|
| 切削油 | cutting oil |
| 摩擦 | friction |
| 工具 | tool |
| 摩耗 | wear |
Question 9
感電を防ぐため、被覆が傷ついた電線はビニールテープを巻き、水で濡れた床の上でもそのまま使い続けてよい。
To prevent electric shock, an electrical wire with damaged insulation may simply be wrapped with vinyl tape and used continuously even on a wet floor.
- A. ○
○ True - B. ×
× False
Show answer
Correct answer: B
This statement is false. Wires with damaged insulation pose a severe risk of current leakage and electric shock, especially on wet floors; they must be taken out of service immediately rather than taped over for continued use.
| Word | Meaning |
|---|---|
| 感電 | electric shock |
| 被覆 | insulation covering |
| 電線 | electric wire |
| 床 | floor |
Question 10
図面に「φ20」と書かれているとき、半径や正方形の一辺ではなく、円の直径が20mmであることを表している。
When a drawing shows 'φ20', it indicates that the diameter of a circle is 20 mm, rather than a radius or the side of a square.
- A. ○
○ True - B. ×
× False
Show answer
Correct answer: A
This statement is true. The symbol φ (phi) before a dimension indicates the diameter of a circle or cylinder (20 mm), whereas radius is written with R and a square with □.
| Word | Meaning |
|---|---|
| 図面 | drawing |
| 直径 | diameter |
| 半径 | radius |
| 正方形 | square |