Relative Humidity (Junior Cert Wood Technology): Flashcards
📚Flashcards
Practise the cards
13 cards from this deck
ShowHide
Practise the cards
13 cards from this deck
Define Relative Humidity (RH)
Define Relative Humidity (RH)
Moisture in air vs max it can hold at that temperature
RH role in timber seasoning
RH role in timber seasoning
Balances moisture in timber
Define Moisture Content
Define Moisture Content
Water weight in timber vs dry weight as percentage
Moisture Content indicates
Moisture Content indicates
When timber seasoning is complete
Define Hygroscopicity
Define Hygroscopicity
Ability to absorb or release moisture
Hygroscopicity effect on wood
Hygroscopicity effect on wood
Makes wood expand or shrink
Why control RH in seasoning
Why control RH in seasoning
Manages drying rates, prevents warping and cracking
High RH effect on timber
High RH effect on timber
Raises timber's moisture content
Low RH effect on timber
Low RH effect on timber
Lowers timber's moisture content
Wood's reaction to RH changes
Wood's reaction to RH changes
Takes in or releases moisture, changing size and shape
Hygroscopicity importance
Hygroscopicity importance
Keeps wood stable, e.g., in furniture making
RH role in drying schedules
RH role in drying schedules
Stops defects like warping, checking, case hardening
RH manages in drying process
RH manages in drying process
Rate of moisture reduction inside wood
