
METALURGICAL TEST 2025
Quiz
•
Others
•
1st Grade
•
Practice Problem
•
Hard
miftahul mukhlis
Used 4+ times
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16 questions
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1.
MULTIPLE CHOICE QUESTION
10 sec • 5 pts
Mengapa kadar karbon memengaruhi kekerasan maksimum baja pada heat treatment?
Menurunkan titiktitik lebur martensit
Meningkatkan pembentukan fasa ferite
Meningkatkan Pembentukan Fasa Martensite
Mempercrpat pendinginan
2.
MULTIPLE CHOICE QUESTION
10 sec • 5 pts
Jika media pendinginan pada saat jominy menggunakan media oli, hasil uji menunjukan seperti apa dibanding dengan media air?
Kekerasan lebih tinggi di semua titiik
penurunan laju pendinginan dan pengerasan
Peningkatan hardenability
Kurva identik dengan air
3.
MULTIPLE CHOICE QUESTION
10 sec • 5 pts
Unsur paduan selain karbon yang dapat meningkatkan kekerasan adalah
Sulfur (S)
Molibdenum (Mo)
Timbal (Pb)
Fosfor (P)
4.
MULTIPLE CHOICE QUESTION
10 sec • 5 pts
Apa tujuan utama dari proses annealing pada baja?
Meningkatkan kekerasan secara drastis
Menghilangkan tegangan sisa dan memperbaiki struktur mikro
Membuat baja menjadi tahan karat
Membentuk martensit sebanyak mungkin
5.
MULTIPLE CHOICE QUESTION
10 sec • 5 pts
Perbedaan utama antara proses normalizing dan annealing terletak pada
Suhu pemanasan
Jenis Material
Media pendingin
Lama pemanasan
6.
MULTIPLE CHOICE QUESTION
10 sec • 5 pts
Mengapa proses tempering dilakukan setelah hardening ?
Untuk meningkatkan titik leleh material
Untuk menurunkan kekerasan secara drastis
Untuk mengurangi kerapuhan martensit dan meningkatkan ketangguhan
Untuk meningkatkan kekerasan lebih lanjut
7.
MULTIPLE CHOICE QUESTION
10 sec • 5 pts
Tujuan utama dari proses tempering adalah...
Membentuk austenit
Meningkatkan kekuatan tarik
Menghilangkan semua struktur martensit
Menyeimbankan antara kekerasan dan keuletan
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