MTC Marine Plumbing & Sanitation Systems 2

Question 1

What component is installed between the seacock and the raw water pump to protect the impeller from debris and marine growth?

Accepted Answer

Raw water strainer

Answer

A raw water strainer filters sediment, shells, and debris from incoming seawater before it reaches the impeller, preventing damage and blockage.

Question 2

At what interval should a raw water pump impeller typically be inspected or replaced on a marine engine?

Accepted Answer

Every 100 hours or annually, whichever comes first

Answer

Most manufacturers recommend inspecting or replacing the raw water impeller every 100 hours or annually to prevent unexpected cooling system failure.

Question 3

What is the primary function of a bilge pump aboard a marine vessel?

Accepted Answer

To remove accumulated water from the lowest part of the hull

Answer

The bilge pump removes water that collects in the bilge—the lowest interior part of the hull—to keep the vessel safe, dry, and buoyant.

Question 4

Which type of bilge pump system is designed to activate automatically without crew intervention when water reaches a preset level?

Accepted Answer

Electric centrifugal pump with an automatic float switch

Answer

An electric centrifugal bilge pump with a float switch automatically activates when rising water lifts the float, providing protection even when no one is aboard.

Question 5

What is the correct winterizing procedure for a marine vessel's freshwater plumbing system to prevent freeze damage?

Accepted Answer

Drain all water from lines and add non-toxic propylene glycol (RV) antifreeze

Answer

Draining all water and adding non-toxic RV antifreeze (propylene glycol) protects plumbing from freeze damage while remaining safe for potable water systems.

(MTC) Marine Technician Certification Practice Test

(MTC) Marine Technician Certification Practice Test

MTC Marine Plumbing & Sanitation Systems 2