MTC MTC Hull & Structural Systems

Question 1

What is the primary purpose of a sacrificial anode on a marine vessel?

Accepted Answer

To prevent galvanic corrosion on metal components

Answer

Sacrificial anodes are made of a more active metal (zinc, aluminum, or magnesium) that corrodes preferentially to protect the hull and drive components from galvanic corrosion.

Question 2

When repairing a fiberglass hull blister, what is the FIRST step a technician should take?

Accepted Answer

Grind out the blister and allow the area to dry completely

Answer

The blister must be opened, cleaned, and thoroughly dried before any repair material is applied to ensure a proper bond and prevent re-blistering.

Question 3

What material is most commonly used for repairing stress cracks in a fiberglass boat hull?

Accepted Answer

Epoxy resin

Answer

Epoxy resin provides superior adhesion and flexibility compared to polyester, making it the preferred choice for structural fiberglass hull repairs.

Question 4

What is the correct term for the measurement of a boat's displacement at rest in the water?

Accepted Answer

Draft

Answer

Draft refers to the vertical distance between the waterline and the lowest point of the hull, indicating how deep the vessel sits in the water.

Question 5

Which type of bilge pump is most reliable for automatic operation in an unattended vessel?

Accepted Answer

Electric submersible pump with float switch

Answer

An electric submersible bilge pump with a float switch automatically activates when bilge water reaches a preset level, providing hands-free water removal.

(MTC) Marine Technician Certification Practice Test

(MTC) Marine Technician Certification Practice Test

MTC MTC Hull & Structural Systems