
Parameter pemesinan dan WPS
Quiz
β’
Engineering
β’
11th Grade
β’
Practice Problem
β’
Hard
Peserta 20576
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min β’ 10 pts
Kemampuan alat potong untuk menyayat bahan dengan aman pada proses pembubutan dan menghasilkan tatal dalam satuan panjang/waktu (meter/menit) adalah ...
Kecepatan Pemakanan (Feed - F)
Kecepatan Putaran Mesin (n)
Kecepatan Potong (Cutting Speed - Cs)
Waktu Proses Pemesinan (Tm)
Kecepatan Keliling (Peripheral operating speed - POS)
2.
MULTIPLE CHOICE QUESTION
1 min β’ 10 pts
Satuan Kecepatan putaran spindel mesin bubut (n) adalah ...
Revolution per minutes (Rpm)
Revolution per seconds (Rps)
Rotation per minutes (Rpm)
Rotation pos speed (Rps)
Milimeter per seconds (Mps)
3.
MULTIPLE CHOICE QUESTION
1 min β’ 10 pts
Kecepatan putararan mesin bubut (n) dapat dihitung dengan rumus β¦
π = πΓd πππ
1000ΓπΆπ
π = πΆπ Γπ πππ
1000Γπ
π = 1000ΓπΆπ πππ
πΓπ
π = 1000ΓπΆπ πππ
1000Γπ
π = πΓπ πππ
n
4.
MULTIPLE CHOICE QUESTION
1 min β’ 10 pts
Seorang operator mesin bubut melakukan pembubutan rata benda kerja alumuniun dari diameter 40 mm menjadi diameter 35 mm dengan kecepatan putaran mesin yang digunakan adalah 500 putaran/menit. Feeding rate (besar pemakanan) untuk pengerjaan bahan aluminium pada tabel menunjukkan angka 0,15 mm/putaran. Maka kecepatan pemakanan adalah ... mm/menit.
100
35
15
45
75
5.
MULTIPLE CHOICE QUESTION
1 min β’ 10 pts
Pembubutan benda kerja berdiameter 30 mm dari bahan St 37 dengan kecepatan potong Cs = 80 m/menit, maka putaran mesin yang cocok pada pilihan dibawah ini adalah β¦. Rpm
220
470
850
1000
1200
6.
MULTIPLE CHOICE QUESTION
1 min β’ 10 pts
Membubut tirus dengan memiringkan/menggeser eretan atas, rumus yang dapat digunakan adalahβ¦.
tan(Ξ±)= D Γ d β
2βL
tan(Ξ±)= Dβ dβ
2+L
tan(Ξ±)= DΓdβ
2ΓL
tan(πΌ)= π·+π
2ΓπΏ
tan(πΌ)= π·βπ
2ΓπΏ
7.
MULTIPLE CHOICE QUESTION
1 min β’ 10 pts
Perubahan geometri pahat bubut akibat lebih rendah pusat dengan sumbu senter pada saat pembubutan muka, permukaan hasil pembubutan akan menjadi ...
Menonjol
Cekung
Beralur
Menyudut
Cembung
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