
Coating Process Quiz bab 2 -4
Authored by linen mocha
Chemistry
Professional Development
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Apa yang dimaksud dengan Total Solid dalam proses pelapisan?
Kandungan ion H+
Persentase padatan dalam pelapisan
Kandungan air dalam kertas
Sudut kontak pelapisan pada kertas
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Apa fungsi retensi air dalam pelapisan?
Untuk menahan pigmen di permukaan mesin
Untuk menjaga pelapisan tetap hangat
Untuk mempertahankan air agar pelapisan tidak cepat diserap ke dalam serat kertas
Untuk mencegah kertas dasar menjadi licin
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Apa arti sudut kontak (contact angle) < 90°?
Kontak Pemukaan buruk
Kontak Pemukaan baik
Tidak ada efek berarti
Viscositas turun drastis
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Viscosity is measured in units:
Newton
Pascal Second (Pa.s)
Volt
Joule
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kenapa kandungan air yang tinggi dalam slurry pelapis harus dihindari?
Membuat pelapis keras
Menyebabkan gelembung/ruang kosong yang mengurangi kualitas permukaan
Meningkatkan kilau
Mengurangi grammage
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tegangan permukaan yang terlalu rendah dapat menyebabkan:
Lapisan pelapis tidak menyebar
Gelembung sulit untuk melarikan diri
Pelapis meresap terlalu dalam ke dalam kertas
Kandungan air meningkat
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dalam pengukuran viskositas dengan viskometer Brookfield, peningkatan torsi berarti:
Liquid is getting thinner
Liquid is getting thicker
pH is getting lower
Total Solid is decreasing
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