
2TR - MTR - Brusné materiály
Authored by Jaroslav Malek
Other
9th - 12th Grade
Used 9+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
"Mají rozdílnou tvrdost a proto se používají pouze zřídka" - platí pro
přírodní brusiva
syntetická brusiva
karborundum
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Mezi syntetická brusiva nepatří
nitrid boru
karbid křemíku
smirek
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Zrnitost označuje
počet zrn na 1 palec čtvereční
počet zrn na 1 cm čtvereční
počet zrn na 1 dm čtvereční
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Vrstvy brusiva odspoda jsou v pořadí
podklad brusiva, pojivo, nános brusiva
podklad brusiva, nános brusiva
podklad brusiva, brusivo, pojivo
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Vhodné podmínky pro skladování brusiv jsou
18 - 22 °C, 45 - 60 % vlhkosti
18 - 22 °C, 60 - 90 % vlhkosti
5 - 10 °C, 30 - 40 % vlhkosti
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Jako pojidlo u brusiv byste použili
PVAc lepidlo
Tavné lepidlo
UF lepidlo
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Sypaná vrstva na brusném papíře je posypána asi
z 30%
z 45%
ze 60%
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