AFAB 120 FINAL EXAM QUESTIONS
AND ANSWERS
What type of vacuum bag removes more resin and air - Answer-double bagging
Leaks can be caused by multiple things - Answer-all of the above
Many types of bagging can be used, which one you use depends on the ability to
withstand the cure temperature. - Answer-True
Using shot bags the weight of the bags provide pressure - Answer-True
Disadvantages to using C clamps - Answer-do not hold constant pressure and have to
be tightened.
Composite materials applicable to aerospace construction and made by imbedding high
strength fibers with an essentially homogenous matrix - Answer-advanced composites
High strength light weight components - Answer-strength to weight ratio
The threads running length of the fabric as it comes off the bolt. is parallel to the
selvage edge - Answer-warp
A laminate with the fibers oriented in more than one direction - Answer-bidirectional
Some epoxy resins require heat to develop full strength and reduce brittleness -
Answer-True
Most widely accepted form to apply heat - Answer-Heat blanket
Senses the temperature of the part and relays the temperature to the monitor - Answer-
thermocouple
The purpose of applying mechanical pressure is to remove excess resin from the
components. - Answer-True
Clecos are used in conjunction with --- to apply pressure to the repair. - Answer-Caul
plates
What type of bagging process is used on larger surfaces. - Answer-Surface Bagging
, The purpose of applying mechanical pressure is to hold the repair securely and prevent
any shifting of the patches during the curing process. - Answer-True
--- is primarily used during the vacuum bagging process to remove excess resin into the
bleeder. - Answer-Peel Ply
what care should be taken when using self-enclosed bagging when parts are hollow. -
Answer-internal and external bagging to prevent collapsing.
a vacuum leak check is done to make sure the bag is sealed properly - Answer-True
after vacuum is drawn on the part the vacuum hose is disconnected for how many
minutes - Answer-2 minutes
what does a drop in mercury mean during a leak check. - Answer-loosing pressure,
vacuum pressure leaking
an allowable drop in mercury is 1-4 - Answer-True
after cure process is complete, vacuum bag material is removed from part, peel ply can
be kept on the part to keep the surface clean. - Answer-True
many types of vacuum bagging materials, the one you use depends on pulling the
proper amount of vacuum, and moisture content. - Answer-True
insulation blankets are used to minimize the amount heat loss of during the curing
process - Answer-True
purpose of caul plate - Answer-to add extra pressure and smooth contour of part.
when a cure is achieved at a tempeature of 65-80 degrees over a period of 24 hrs is -
Answer-Room temp cure
curing process used with a manual operating controller to make adjustments in time
intervals - Answer-step cure
programmable more accurate curing process - Answer-ramp and soak cure
hot bond function - Answer-applies pressure by vacuum pump, applies controlled heat
heat source that distributes uniformed heat to the repair area - Answer-heat blanket
a heat source that causes problems to repair cure when pointed directly on - Answer-all
of the above
AND ANSWERS
What type of vacuum bag removes more resin and air - Answer-double bagging
Leaks can be caused by multiple things - Answer-all of the above
Many types of bagging can be used, which one you use depends on the ability to
withstand the cure temperature. - Answer-True
Using shot bags the weight of the bags provide pressure - Answer-True
Disadvantages to using C clamps - Answer-do not hold constant pressure and have to
be tightened.
Composite materials applicable to aerospace construction and made by imbedding high
strength fibers with an essentially homogenous matrix - Answer-advanced composites
High strength light weight components - Answer-strength to weight ratio
The threads running length of the fabric as it comes off the bolt. is parallel to the
selvage edge - Answer-warp
A laminate with the fibers oriented in more than one direction - Answer-bidirectional
Some epoxy resins require heat to develop full strength and reduce brittleness -
Answer-True
Most widely accepted form to apply heat - Answer-Heat blanket
Senses the temperature of the part and relays the temperature to the monitor - Answer-
thermocouple
The purpose of applying mechanical pressure is to remove excess resin from the
components. - Answer-True
Clecos are used in conjunction with --- to apply pressure to the repair. - Answer-Caul
plates
What type of bagging process is used on larger surfaces. - Answer-Surface Bagging
, The purpose of applying mechanical pressure is to hold the repair securely and prevent
any shifting of the patches during the curing process. - Answer-True
--- is primarily used during the vacuum bagging process to remove excess resin into the
bleeder. - Answer-Peel Ply
what care should be taken when using self-enclosed bagging when parts are hollow. -
Answer-internal and external bagging to prevent collapsing.
a vacuum leak check is done to make sure the bag is sealed properly - Answer-True
after vacuum is drawn on the part the vacuum hose is disconnected for how many
minutes - Answer-2 minutes
what does a drop in mercury mean during a leak check. - Answer-loosing pressure,
vacuum pressure leaking
an allowable drop in mercury is 1-4 - Answer-True
after cure process is complete, vacuum bag material is removed from part, peel ply can
be kept on the part to keep the surface clean. - Answer-True
many types of vacuum bagging materials, the one you use depends on pulling the
proper amount of vacuum, and moisture content. - Answer-True
insulation blankets are used to minimize the amount heat loss of during the curing
process - Answer-True
purpose of caul plate - Answer-to add extra pressure and smooth contour of part.
when a cure is achieved at a tempeature of 65-80 degrees over a period of 24 hrs is -
Answer-Room temp cure
curing process used with a manual operating controller to make adjustments in time
intervals - Answer-step cure
programmable more accurate curing process - Answer-ramp and soak cure
hot bond function - Answer-applies pressure by vacuum pump, applies controlled heat
heat source that distributes uniformed heat to the repair area - Answer-heat blanket
a heat source that causes problems to repair cure when pointed directly on - Answer-all
of the above
