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WorksheetsQUIZ 2_EQE2023 WET & DRY LAYUP PROCESS (CHAPTER 3&4)
Total questions: 15
Worksheet time: 11mins
In mould/tooling preparation, types of mould release agents as below.
I. Carnuba wax
II. Spray releases
III. Internal releases
IV. Mould compounds
I, II, III
I, II, IV
II, III, IV
In hand lay up process, what purpose of manual laminating roller?
I. Remove entrapped air
II. Seal the mould surface
III. Compacts the composite
IV. Wets the reinforcement with the resin
I, II, III
I, II, IV
I, III, IV
Peel ply is a woven fabric that placed immediately on top of or under the composite laminate.
TRUE
FALSE
Breather placed on top of barrier film to allow uniform application of vacuum pressure over the laminate and removal of entrapped air during cure.
TRUE
FALSE
As refer to vaccum bagging process, determine A, B and C part.
(A) Breather
(B) Peel Ply
(C) Bagging Flim
(A) Bagging Flim
(B) Breather
(C) Peel Ply
(A) Bagging Flim
(B) Peel Ply
(C) Breather
In prepreg layup procedure, curing table helps to compact the laminate and remove entrapped air from between the plies, vacuum de-bulked shall be applied for every 3-5 plies and more if the shape is complex.
TRUE
FALSE
Which the following statement about vacuum de-bulking is WRONG.
To compact the laminate and remove entrapped air from between the plies.
Consists of covering the lay up with a layer of non porous release material.
Applying temporary vacuum bag and pulling a vacuum for few minute.
Prepreg layup can be cured by three common different techniques as below.
I. Ambient environment
II. Vacuum beg wet layup
III. Autoclave prepreg layup
IV. Press cure prepreg layup
I, II, III
II, III, IV
I, II, IV
Which the following statement is WRONG.
Bleeder used to absorb excess resin from the laminate during cure.
Caul plates used to to maintain same heating and cooling rate as mold.
Dam located peripherally to maximize edge bleeding.
Vacuum bagging consists of components as below.
I. Vacuum bag
II. Vacuum source
III. Bag sealant tape
IV. Vacuum hoses & valves
I, II, III
II, III, IV
I, II, III, IV
Which the following statement about vacuum bagging is WRONG?
Used to contain any vacuum pressure applied.
Bag perforation must be prevented with sharp edges on tool and properly sealed on edges.
Folds must be properly made or undersirable wrinkles may occur in part
Assume typical ratio of polyester resin to fiber is 2:1. Calculate the amount of polyester resin required if fiber weight 650g.
*Answer in gram
(a)
Assume typical ratio of polyester resin to fiber is 2:1, calculate the amount of MEKP (1.5%) required if fiber weight is 700g.
*Answer in gram
(a)
The disadvantages of using prepreg is normally used for high end product, expensive epoxy resin system and low investment for tooling.
TRUE
FALSE
Prepreg layup has many advantages over wet layup such as low resin content, proper mixing resin system, long service life, consistence and uniform fabrications results, low labor cost and less toxic.
TRUE
FALSE
