Marine Plumbing & Sanitation Systems Flashcards
7 cards from real MTC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Marine Plumbing & Sanitation Systems flashcards as text
What component is installed between the seacock and the raw water pump to protect the impeller from debris and marine growth?
Answer: Raw water strainer
A raw water strainer filters sediment, shells, and debris from incoming seawater before it reaches the impeller, preventing damage and blockage.
At what interval should a raw water pump impeller typically be inspected or replaced on a marine engine?
Answer: Every 100 hours or annually, whichever comes first
Most manufacturers recommend inspecting or replacing the raw water impeller every 100 hours or annually to prevent unexpected cooling system failure.
What is the primary function of a bilge pump aboard a marine vessel?
Answer: To remove accumulated water from the lowest part of the hull
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.
Which type of bilge pump system is designed to activate automatically without crew intervention when water reaches a preset level?
Answer: Electric centrifugal pump with an automatic float switch
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.
What is the correct winterizing procedure for a marine vessel's freshwater plumbing system to prevent freeze damage?
Answer: Drain all water from lines and add non-toxic propylene glycol (RV) antifreeze
Draining all water and adding non-toxic RV antifreeze (propylene glycol) protects plumbing from freeze damage while remaining safe for potable water systems.
What is a 'barb' fitting most commonly used for in marine plumbing applications?
Answer: Connecting flexible hose to rigid pipe, pumps, or fixtures
Barb fittings have ridged projections that grip the inside of a flexible hose when secured with a clamp, creating a reliable and leak-resistant connection.
What does 'positive flotation' mean in the context of a vessel's safety systems?
Answer: The vessel contains enough built-in buoyancy material to remain afloat even if the hull fills with water
Positive flotation means the vessel is constructed with sufficient buoyancy foam or material that it will remain afloat even when completely swamped, independent of pumping.