問題詳情
138. 有關齒輪製圖的敘述，下列何者正確？
(A)正齒輪之圓形視圖，不須繪製齒底圓
(B)剖面之螺旋齒輪非圓視圖，須按其旋向以三條平行等距細實線表示於中心線的上方
(C)蝸輪的圓形視圖，齒頂圓應投影其最大者，節圓投影最小者
(D)蝸桿的圓形視圖，節圓以一點細鏈線繪製，齒底圓不必畫。
(A)正齒輪之圓形視圖，不須繪製齒底圓
(B)剖面之螺旋齒輪非圓視圖，須按其旋向以三條平行等距細實線表示於中心線的上方
(C)蝸輪的圓形視圖，齒頂圓應投影其最大者，節圓投影最小者
(D)蝸桿的圓形視圖，節圓以一點細鏈線繪製，齒底圓不必畫。
參考答案
答案：A,C,D
難度：困難0.333333
統計：A(2),B(1),C(1),D(2),E(1)
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