MST MST Hull & Fiberglass Repair 2

Question 1

Delamination of a fiberglass hull is best detected using which method?

Accepted Answer

Sounding with a plastic mallet

Answer

Visual inspection only

Answer

Pressure washing the surface

Answer

Applying heat with a heat gun

Question 2

Which type of resin provides superior adhesion and moisture resistance for structural hull repairs compared to polyester?

Accepted Answer

Epoxy resin

Answer

Vinyl ester resin

Answer

Standard orthophthalic polyester

Answer

Acrylic resin

Question 3

What grit sandpaper is typically used for the final prep of gel coat before applying a color-matched gel coat patch?

Accepted Answer

220–320 grit wet/dry

Answer

36 grit dry

Answer

80 grit dry

Answer

600 grit wet only

Question 4

Why is polyvinyl alcohol (PVA) film sometimes applied over a gel coat repair?

Accepted Answer

To exclude air and allow the surface to cure fully

Answer

To add UV protection permanently

Answer

To create a non-skid texture

Answer

To prevent osmotic blistering

Question 5

A spider crack pattern in gel coat typically indicates what underlying condition?

Accepted Answer

Impact damage or flexing stress in the laminate

Answer

Excessive UV exposure only

Answer

Improper color matching of gel coat

Answer

Normal aging requiring no action

Question 6

What is the purpose of using a release wax on the repair mold when performing a gel coat blister repair?

Accepted Answer

To prevent the patch material from bonding to the mold surface

Answer

To increase the cure speed of the resin

Answer

To add color pigment to the gel coat

Answer

To improve UV resistance of the finished surface