# 農業機械修護 乙級 學科 部分詳解 112-10/25
## 1：農業機械之檢查、保養、調整(391題)
## 2：基本工作法(105題)
## 3：計量與測試(99題)

### P35-19
未滿18.5 最靠近 選3
18
+0.49 = 18.49 mm
內徑分厘卡 數字向左轉變大 向上轉變大
深度分厘卡 數字向下轉變大 向左轉變大

### P35-20

英制游標卡尺 1表示1吋 本尺1吋有16格
0在約11.6格
(11/16)吋*8/8 = 88/128吋
大於88最接近88 選3
游尺5共線
88/128 + 5/128 = 93/128 吋
https://www.youtube.com/watch?v=3Auwk6zyRWU&t=131s
https://www.youtube.com/watch?v=PBAJo52lMpg
https://www.youtube.com/watch?v=r_iC1nXbJd8

### P35-21
英制襯筒1 代表0.1吋
0.1吋有4格
約0.16吋 最靠近0.16選3
套筒50格 兩次平分 襯筒1格0.025吋
套筒刻度約13.3
約0.15
_+0.013 = 0.163吋
襯筒4共線
._0.15
+0.013
+0.004 = 0.1634吋
https://www.youtube.com/watch?v=eJH1jl_m9DM

### P37-56
:::danger
題目有問題
選尾數0.7mm
就可以
:::
很怪 沒答案 可能選項有錯
或是分厘卡不是0-25mm
但是如果分厘卡是25-50mm
初始值應該是25 不是0
不管了 繼續算
找尾數是0.7選4
假設是25-50mm
25+11.7=36.7mm 就正確

### P38-75
:::danger
選項都畫錯
背0 4 8是5條
其他是2條
選24就可以
:::

刻劃游標卡尺精度有兩種
5條、1/20 (0.05)mm、1/128"
2條、1/50 (0.02)mm、0.001"

每個選項都劃錯
公制英制0 要垂直共線
這樣才對
1選項2mm-(39mm/20格)=1/20=5條

2選項1mm-(49mm/50格)=1/50= 2條

3選項 很怪
下面公制 1mm/50格= 2條
但是上面英制(1/16)吋 / 8格 = 1/128吋
很怪 沒有這種 游標卡尺吧 特別訂製款嗎
4選項 上面公制 1mm/20格=5條
下面英制0.001吋
很怪 沒有這種 游標卡尺吧 特別訂製款嗎
0.001吋 不等於 0.02mm 居然選4
https://www.youtube.com/watch?v=3Auwk6zyRWU&t=131s

### P38-76
選項都畫錯
13是2條 24是5條

## 4：農機材料、油料及元件之識別(122題)
## 5：識圖與製圖(86題)
## 6：修護場所管理(39題)

:::danger
(37)
P = V^2 / R
1.2 = 24^2 / R
R = 480Ω
:::
參考資料
1.內徑分厘卡
https://www.amazon.com/Andrewheo6r8a0s25549/dp/B09D3HMXF5/ref=sr_1_7_sspa?crid=MB3FH2R82M78&keywords=micrometer+inside&qid=1698385307&sprefix=MICROMETER+in%2Caps%2C309&sr=8-7-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9tdGY&psc=1
https://www.amazon.com/-/zh_TW/Shars-%E8%8B%B1%E5%90%8B-1-2-%E5%85%AC%E5%88%86-3-0-%E7%B2%BE%E6%BA%96%E5%85%A7%E9%83%A8%E6%B8%AC%E5%BE%AE%E8%A8%88-303-2101/dp/B082TW8GH2/ref=sr_1_9?crid=MB3FH2R82M78&keywords=micrometer%2Binside&qid=1698385307&sprefix=MICROMETER%2Bin%2Caps%2C309&sr=8-9&th=1
https://www.amazon.com/-/zh_TW/145-193-Mitutoyo-Vernier-%E5%86%85%E9%83%A8%E5%BE%AE%E7%B1%B3%EF%BC%8C%E5%8D%A1%E9%92%B3%E7%B1%BB%E5%9E%8B%EF%BC%8C%E8%8B%B1%E5%AF%B8/dp/B0006J4506/ref=sr_1_10?crid=MB3FH2R82M78&keywords=micrometer%2Binside&qid=1698385307&sprefix=MICROMETER%2Bin%2Caps%2C309&sr=8-10&th=1

2.深度分厘卡
https://www.amazon.com/WONDERSUNM-%E6%B7%B1%E5%BA%A6%E6%B8%AC%E5%BE%AE%E8%A8%88-0-00-1-%E5%88%BB%E5%BA%A6%E6%B8%AC%E9%87%8F%E7%AF%84%E5%9C%8D-%E5%B0%88%E6%A5%AD%E7%B2%BE%E5%AF%86%E9%87%8F%E6%B8%AC%E5%B7%A5%E5%85%B7/dp/B07FXHT2C4/ref=sr_1_2_sspa?crid=2H2PWGZUO8FVL&keywords=micrometer+depth&qid=1698385358&sprefix=micrometer+d%2Caps%2C338&sr=8-2-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&psc=1
https://www.amazon.com/-/zh_TW/Mitutoyo-129-132-0-0-%E8%8B%B1%E5%90%8B%E6%B7%B1%E5%BA%A6%E5%BE%AE%E7%B1%B3-%E8%8B%B1%E5%90%8B%E5%BA%95%E5%BA%A7/dp/B0006J45B0/ref=sr_1_3?crid=2H2PWGZUO8FVL&keywords=micrometer%2Bdepth&qid=1698385358&sprefix=micrometer%2Bd%2Caps%2C338&sr=8-3&th=1
https://www.amazon.com/-/zh_TW/Accusize-%E5%B7%A5%E5%85%B7-0-6-%E5%90%8B%E5%BA%95%E5%BA%A7%E7%9B%B4%E5%BE%91%E5%BE%AE%E7%B1%B3%EF%BC%8C5-%E9%8D%B5%EF%BC%8C2025-4201/dp/B019WROS3Q/ref=sr_1_5?crid=2H2PWGZUO8FVL&keywords=micrometer+depth&qid=1698385358&sprefix=micrometer+d%2Caps%2C338&sr=8-5
https://www.amazon.com/-/zh_TW/Mitutoyo-128-105-%E6%B8%B8%E6%A8%99%E6%B7%B1%E5%BA%A6%E8%A8%88-0-0-2-5-0-003/dp/B003U9W0H4/ref=sr_1_10?crid=2H2PWGZUO8FVL&keywords=micrometer%2Bdepth&qid=1698385358&sprefix=micrometer%2Bd%2Caps%2C338&sr=8-10&th=1
https://www.amazon.com/-/zh_TW/Mitutoyo-129-109-%E6%B8%B8%E6%A8%99%E6%B7%B1%E5%BA%A6%E6%B8%AC%E9%87%8F-0-001-0-0027/dp/B003MUO3LC/ref=sr_1_11?crid=2H2PWGZUO8FVL&keywords=micrometer+depth&qid=1698385358&sprefix=micrometer+d%2Caps%2C338&sr=8-11

3.外徑分厘卡
https://www.yen-g.com/Product/mitutoyo-micrometers-103-137-0-25mm-0-01/

4.游標卡尺
https://www.amazon.com/-/zh_TW/Mitutoyo-530-312-%E9%81%A9%E7%94%A8%E6%96%BC%E5%85%A7%E9%83%A8%E3%80%81%E5%A4%96%E9%83%A8%E3%80%81%E6%B7%B1%E5%BA%A6%E5%92%8C%E6%AD%A5%E6%95%B8%E6%B8%AC%E9%87%8F-%E5%85%AC%E9%87%90-150-%E5%85%AC%E9%87%90%E9%89%97%E5%8F%A3%E6%B7%B1%E5%BA%A6/dp/B000VB6ZC0/ref=sr_1_4?crid=1C31RSY48RKWO&keywords=%E6%B8%B8%E6%A8%99%E5%8D%A1%E5%B0%BA%2B0.02mm%2BMITUTOYO&qid=1698391624&sprefix=%E6%B8%B8%E6%A8%99%E5%8D%A1%E5%B0%BA%2B0.02mm%2Bmitutoyo%2Caps%2C533&sr=8-4&th=1