10 exam-style questions with answers and explanations, straight from our 1,030-question bank. Tap an answer to check yourself. When you're ready, take the scored version in the free practice test.
The CCT exam has 100 questions and runs 2 hours.
These 10 free CCT questions are organized by exam domain, so you can see how each part of the Certified Composites Technician blueprint is tested. Reveal the answer and explanation under each question.
In a styrene-containing unsaturated polyester resin, styrene reduces viscosity before cure. What distinguishes it from an inert solvent used only to thin a coating?
Correct answer: D - It reacts with the polyester during cure and becomes part of the crosslinked network.
A panel drawing defines 0 degrees as the panel's lengthwise direction and specifies unidirectional glass in that direction for a predominantly lengthwise tensile load. A proposed substitution rotates that glass to 90 degrees but retains the same glass mass, resin system, and fiber fraction. Which assessment of the substitution is technically sound?
Correct answer: A - It redirects the main reinforcement away from the principal tensile load.
Freshly sprayed gelcoat pulls back into small round craters on one area of a mold. A properly prepared witness panel sprayed immediately afterward with the same material and gun settings is smooth. Neither surface has been backed with laminate. Which cause best fits this pattern?
Correct answer: A - Surface contamination is preventing wetting on that part of the mold.
A wet-film comb is correctly seated against a gelcoated test surface. The 525 micrometer tooth is wet and the adjacent 550 micrometer tooth is dry. The job specification accepts any wet-film thickness from 500 to 600 micrometers. What can the technician conclude from this reading?
Correct answer: C - The film thickness is bracketed within the specified range at this location.
While consolidating a hand-laid glass laminate, a technician sees a silvery pocket between two otherwise fully wetted plies on a flat mold surface. The pocket moves when the roller passes over it, and the resin is still workable. How should the technician deal with this pocket before placing the next ply?
Correct answer: C - Roll the trapped air toward a free edge while the resin remains workable.
An unwaxed polyester laminating resin has cured firm beneath a tacky air-exposed surface. The cure checks and minimum time for the next lay-up stage have passed, the surface is clean, and the part remains within the approved overlamination window. A coworker wants to strip the surface because it is still tacky. Which response is appropriate?
Correct answer: D - Continue the specified lay-up; oxygen inhibition can account for the surface tack.
A bolted fitting is being installed on a foam-cored glass-reinforced plastic panel. At the specified tightening torque, the skins dish inward around the bolt and the foam compresses. Review of the lay-up record shows that the drawing's solid insert was omitted. What function would that insert have provided?
Correct answer: B - Provide a compression-resistant path between the skins to carry the bolt's clamping load.
For a spray-up job, the approved setup calls for a resin-to-glass mass ratio of 2:1 while keeping resin delivery at 6.0 kg/min. Separate calibration catches contain 1.5 kg of resin collected in 15 seconds and 1.2 kg of glass collected in 30 seconds. Catalyst delivery is within its specified range. Which adjustment satisfies both setup requirements?
Correct answer: B - Increase glass delivery to 3.0 kg/min while keeping resin delivery at 6.0 kg/min.
A molding's job traveler permits demolding when valid Barcol readings at all specified locations are at least 35 and the other release checks are satisfied. The readings are 37, 39, 38, 40, and 39; all other checks pass. The resin data sheet also lists a typical fully cured hardness of 45-50. How should these results affect demolding?
Correct answer: B - Demold using the specified supports; the stated release requirements are met.
A finished glass-reinforced plastic cover has a deep handling scratch confined to the gelcoat. Inspection confirms that the laminate underneath is sound. Sanding the surrounding surface down to the bottom of the scratch would leave less gelcoat than the drawing allows. An approved cosmetic repair is permitted for this part. Select the repair that matches the damage.
Correct answer: A - Prepare the scratch and restore the gelcoat locally, then cure and finish the repair.
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