
Geologi Batubara II
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10 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 4 pts
Batubara Antrasit memiliki ciri-ciri utama, yaitu:
a. Kadar karbon rendah dan nilai kalori rendah
b. Kadar karbon tinggi dan nilai kalori tinggi
c. Kadar air tinggi dan sifat mudah terbakar
d. Kadar sulfur tinggi dan sifat mudah terbakar
2.
MULTIPLE CHOICE QUESTION
20 sec • 4 pts
Apa yang dimaksud dengan "coalification" dalam konteks geologi batubara?
a. Proses pembentukan batubara
b. Eksploitasi batubara
c. Pemanfaatan batubara
d. Penyimpanan batubara
3.
MULTIPLE CHOICE QUESTION
20 sec • 4 pts
Teknik penambangan yang umum digunakan untuk lapisan batubara yang terletak dalam lapisan horizontal dan relatif tipis adalah:
a. Penambangan Terbuka
b. Penambangan Bord and Pillar
c. Penambangan Longwall
d. Penambangan Pilar Utuh
4.
MULTIPLE SELECT QUESTION
20 sec • 4 pts
Faktor apa yang biasanya mempengaruhi nilai kalori batubara?
a. Kandungan sulfur
b. Kadar air
c. Kadar abu
d. Kadar karbon
5.
MULTIPLE CHOICE QUESTION
20 sec • 4 pts
Apa yang dimaksud dengan "cleat" dalam geologi batubara?
a. Patahan atau rekahan dalam batubara
b. Kadar air dalam batubara
c. Tingkat penguraian batubara
d. Ukuran partikel batubara
6.
MULTIPLE CHOICE QUESTION
20 sec • 4 pts
Metode eksplorasi yang umum digunakan untuk menentukan ukuran, kedalaman, dan kualitas cadangan batubara adalah:
a. Geolistrik
b. Seismik
c. Pemboran Bor
d. Gravitasi
7.
MULTIPLE CHOICE QUESTION
20 sec • 4 pts
Faktor apa yang dapat menyebabkan terjadinya kavitasi pada pompa slurry yang digunakan dalam penambangan batubara?
a. Kadar air tinggi pada batubara
b. Kandungan sulfur tinggi pada batubara
c. Ukuran partikel batubara yang besar
d. Tekanan tinggi pada sistem pompa
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