MTC MTC Steering & Propulsion Systems

Question 1

What is the most common cause of excessive play (looseness) in a mechanical boat steering system?

Accepted Answer

Worn or stretched steering cable or loose helm connections

Answer

Incorrect propeller pitch

Answer

Misaligned rudder post

Answer

Overfilled hydraulic reservoir

Question 2

When bleeding a hydraulic steering system on a marine vessel, what is the correct procedure?

Accepted Answer

Attach a vacuum pump to the fill port while turning the wheel lock-to-lock

Answer

Add fluid and turn the wheel rapidly back and forth until bubbles stop

Answer

Remove the cylinder and flush with fresh water

Answer

Run the engine at full throttle while filling the reservoir

Question 3

What does 'propeller cavitation' mean in the context of marine propulsion?

Accepted Answer

Formation and collapse of vapor bubbles on propeller blades causing pitting and loss of thrust

Answer

Propeller blades bending under load

Answer

Propeller shaft vibration at high RPM

Answer

Excessive propeller pitch for the engine's power output

Question 4

What is the purpose of a trim tab on an outboard motor or sterndrive?

Accepted Answer

To control the running angle of the vessel to optimize performance and fuel efficiency

Answer

To adjust engine idle speed electronically

Answer

To prevent the propeller from over-spinning

Answer

To limit maximum throttle travel

Question 5

When inspecting a propeller shaft for runout, what tool does a marine technician use?

Accepted Answer

Dial indicator (dial gauge)

Answer

Torque wrench

Answer

Feeler gauge

Answer

Micrometer only

Question 6

What is the function of a cutlass bearing in a marine propulsion system?

Accepted Answer

To support the propeller shaft and allow it to rotate smoothly

Answer

To transfer thrust from the propeller to the hull

Answer

To seal the shaft log against water intrusion

Answer

To absorb shock loads from propeller impact