MTC Steering & Propulsion Systems Flashcards
6 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 6 MTC Steering & Propulsion Systems flashcards as text
What type of steering system is most commonly used on larger recreational vessels over 30 feet due to its power-assisted operation?
Answer: Hydraulic steering
Hydraulic steering uses fluid pressure to actuate the steering cylinder, reducing steering effort on larger, heavier vessels where mechanical systems would require too much physical force.
A technician notices vibration at cruise speed that disappears when the throttle is reduced. What propulsion component should be inspected FIRST?
Answer: Propeller for damage, cupping, or pitch variation
Speed-dependent vibration is a classic symptom of propeller imbalance or damage; a bent blade, nick, or cupped edge creates uneven thrust that worsens as RPM increases.
What is 'prop walk' and when is it most noticeable on a single-engine inboard vessel?
Answer: The lateral force generated by the rotating propeller that causes the stern to swing; most noticeable at low speed in reverse
Prop walk results from the asymmetric effect of the rotating propeller (especially in reverse), causing the stern to swing to port or starboard and making docking maneuvers challenging at low speed.
When replacing a steering cable on an outboard motor, what should a technician ALWAYS verify after installation?
Answer: Full lock-to-lock steering travel without binding and correct cable end attachment at the motor
After cable replacement, the technician must verify unrestricted full range of motion, proper cable routing without kinks, and secure attachment at both the helm and motor tiller arm.
What is the recommended method to check propeller shaft alignment on an inboard vessel?
Answer: Disconnect the shaft coupling and use a feeler gauge to check face and bore alignment between the coupling halves
Shaft alignment is verified by separating the coupling flanges and using a feeler gauge (or dial indicator) to measure angular and parallel misalignment, which if excessive causes severe bearing and seal wear.
Which condition requires IMMEDIATE replacement of a propeller rather than repair?
Answer: A cracked hub or blade root crack extending toward the hub
A crack at the blade root or through the hub is a structural failure risk that can cause the blade to detach at operating RPM, creating a catastrophic hazard; such propellers must be replaced, not repaired.