
TP FRAIS 2
Authored by Sar Joko
Professional Development
12th Grade

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40 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Untuk menentukan kecepatan pemotongan dapat dicari dengan rumus
Cs = ( .d.n)/1000
Cs = ( .d)/100.
Cs = (1000. )/d.n
Cs = (d. )/(1000.n)
Cs = n. .d/100
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Jumlah gigi 18 bagian jika dikerjakan dengan piringan pembagi 18 maka mengasilkan putaran sebanyak
2 putaran 4 lubang
2 putaran 7 lubang
2 putaran 2 lubang
2 putaran 3 lubang
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
hitunglah banyaknya putaran (n) spindel mesin frais jika dipakai untuk pengefraisan dengan kecepatan potong (VC) 20 m/menit dan menggunakan pisau frais berdiameter 50 mm, maka berapa putarannya
127 rpm
138 rpm
147 rpm
158 rpm
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
tentukan kecepatan putaran mesin yang dipakai untuk mengefrais benda kerja kalian dengan menggunakan kecepatan potong 24 m/menit dan pisau berdiameter 20 mm
382 rpm
283 rpm
328 rpm
390 rpm
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
jumlah gigi sebanyak 12 dikerjakan dengan piringan pembagi berapa
21
30
27
33
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
tentukan kecepatan potong yang dipakai untuk mengefrais benda kerja mild steel dengan menggunakan pisau mantel berdiameter (d) = 75 mm, dan putaran mesin (n) = 110 rpm.
20.5 m / menit
22.9 m / menit
24.8 m / menit
25, 9 m / menit
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Diketahui material dari bahan Stainless Steel 304 akan dipotong dengan pisau frais jari (end mill) HSS dengan diameter 20 mm dan jumlah gigi potong (mata potong) = 4 buah dengan kecepatan potong 18 m /menit. berapakah putaran mesinnya
283,4 rpm
286,4 rpm
268,4 rpm
266,4 rpm
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