1TR - MTR - Fyzikální a mechanické vlastnosti dřeva
Quiz
•
Other
•
9th - 12th Grade
•
Hard
Jaroslav Malek
Used 4+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Lesk dřeva ovlivňuje výrazně
přítomnost dřeňových paprsků
přítomnost suků
přítomnost tříslovin
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Hmotnost dřevní hmoty bez veškerých otvorů a mezer se nazývá
objemová hmotnost
měrná hmotnost
buněčná hmotnost
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
U nás je nejlepší rezonanční materiál
rezonanční smrk
rezonanční dub
rezonanční buk
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Vlhkost, která vyplňuje mikroskopické dutinky v buněčných stěnách
vlhkost volná
vlhkost vázaná
vlhkost chemicky vázaná
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Bod nasycení vláken se pohybuje kolem
30% vlhkosti
10% vlhkosti
20% vlhkosti
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Vztah pro výpočet vlhkosti váhovou metodou zní
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Vlastnost dřeva pohlcovat ze vzduchu vodní páry se nazývá
hydroskopicita
hygroskopicita
bod nasycení vláken
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