50 Common MCA Oral Exam Questions with Model Answers

Prepare for your MCA oral exam with these 50 commonly asked questions across all certificate levels. Each question includes a model answer framework to help you structure your responses effectively.

COLREGs Questions (1-10)

1. Q: What are the lights of a power-driven vessel underway?
   A: Masthead light forward, second masthead light abaft (if over 50m), sidelights (red port, green starboard), and sternlight.
2. Q: What sound signal in restricted visibility when making way?
   A: One prolonged blast at intervals of not more than 2 minutes (Rule 35a).
3. Q: Two red lights in vertical line - what vessel?
   A: Vessel not under command (NUC) - unable to maneuver as required by the rules.
4. Q: Who gives way in a crossing situation?
   A: The vessel which has the other on her starboard side (give-way vessel). The other is stand-on (Rule 15).
5. Q: What is Rule 5?
   A: Look-out - proper look-out by sight, hearing, and all available means at all times.
6. Q: Define safe speed (Rule 6)?
   A: Speed allowing proper and effective action to avoid collision, stopping within distance appropriate to prevailing conditions.
7. Q: What are the lights of a sailing vessel?
   A: Sidelights and sternlight. May also show tricolor light at masthead. Under 20m may combine in one lantern.
8. Q: What shape for a vessel at anchor?
   A: One black ball forward where best seen. Over 100m also one ball aft.
9. Q: Restricted visibility action?
   A: Rule 19 - proceed at safe speed, engines ready, take avoiding action if risk of collision, avoid altering to port for vessel forward of beam.
10. Q: What is overtaking situation?
    A: Coming up from more than 22.5° abaft the beam. Overtaking vessel keeps clear (Rule 13).

Navigation Questions (11-20)

1. Q: Essential elements of passage plan?
   A: Appraisal, planning, execution, monitoring. Include waypoints, clearing bearings, no-go areas, contingencies.
2. Q: When to call the master?
   A: Restricted visibility, traffic concern, equipment failure, inability to maintain course/speed, or per standing orders. Never hesitate.
3. Q: What is squat?
   A: Vessel sinks lower in shallow water due to increased water velocity under hull. Increases with speed and block coefficient.
4. Q: How do you check compass error?
   A: Transit bearings, celestial azimuth, amplitude, or comparing with known accurate compass.
5. Q: What information on passage plan?
   A: Course, distances, waypoints, clearing bearings, dangers, no-go areas, contingency anchorages, reporting points.
6. Q: Define NOGO area?
   A: Area where vessel cannot safely navigate due to depths, obstructions, or restrictions. Marked on chart with clearing lines.
7. Q: What is parallel indexing?
   A: Radar technique using VRM/EBL to monitor vessel's position relative to charted features for safe navigation.
8. Q: Minimum look-out requirements?
   A: Dedicated look-out in addition to OOW when required by circumstances (traffic, visibility, workload).
9. Q: What charts must you carry?
   A: Largest scale charts covering route, corrected to latest Notice to Mariners. Electronic charts (ENC) with backup.
10. Q: How to verify GPS position?
    A: Cross-check with visual bearings, radar ranges, depth soundings, or other independent means.

Emergency Response (21-30)

1. Q: Immediate actions on smelling smoke?
   A: Raise alarm, locate source, isolate if safe, muster crew, inform master, prepare fire equipment, establish communication.
2. Q: Man overboard procedure?
   A: Shout "MOB", throw lifebuoy, post lookout, execute Williamson turn, sound alarm, inform master, prepare rescue boat.
3. Q: Collision immediate actions?
   A: Sound general alarm, stop engines, assess damage, check watertight integrity, inform master, muster crew, prepare abandon ship if needed.
4. Q: Grounding actions?
   A: Stop engines, sound alarm, assess position/damage, check soundings, inform master/coastguard, prepare to refloat or evacuate.
5. Q: Fire in engine room?
   A: Raise alarm, isolate fuel/ventilation, muster at station, prepare boundary cooling, consider CO2 flooding, inform authorities.
6. Q: Flooding response?
   A: Sound alarm, close watertight doors, activate pumps, assess extent, shore up if possible, prepare abandon ship.
7. Q: Abandon ship signal?
   A: Seven short blasts followed by one long blast on whistle, supplemented by alarm bells.
8. Q: What in emergency steering?
   A: Switch to emergency steering, inform bridge, test communications, steer by compass, proceed to safe area.
9. Q: Power failure on bridge?
   A: Inform ECR, switch to emergency power, post lookouts, sound appropriate signal, reduce speed, assess situation.
10. Q: Pilot falls overboard?
    A: Same as MOB - raise alarm, execute recovery maneuver, throw lifebuoy, inform master, recover pilot.

ISM and Safety (31-40)

1. Q: What is ISM Code?
   A: International Safety Management Code - requires safe management procedures, SMS, designated person, and company responsibility.
2. Q: What is risk assessment?
   A: Identify hazards, assess risks, implement controls, monitor effectiveness. Required before hazardous operations.
3. Q: When need permit to work?
   A: Hot work, enclosed space entry, electrical work, working aloft/overside, or any non-routine hazardous operation.
4. Q: Enclosed space entry procedure?
   A: Risk assessment, permit, test atmosphere, ventilate, standby person, rescue equipment, communication, monitor continuously.
5. Q: What is near miss reporting?
   A: Report incidents that could have caused harm but didn't. Learn from them to prevent future accidents.
6. Q: OOW duties?
   A: Safe navigation, collision avoidance, monitor position, keep look-out, comply with regulations, inform master when needed.
7. Q: What is SMS?
   A: Safety Management System - company procedures for safe operations, pollution prevention, emergency preparedness.
8. Q: Designated Person Ashore?
   A: Company representative providing link between ship and shore, monitoring safety and pollution prevention.
9. Q: Rest hour requirements?
   A: Minimum 10 hours in 24, 77 hours in 7 days. Max 2 periods, one at least 6 hours. Record in rest hour log.
10. Q: Alcohol policy?
    A: BAC limit 0.05%, no consumption within 4 hours of watch, company may have stricter limits.

Ship Handling (41-50)

1. Q: What is pivot point?
   A: Point about which vessel turns. Moves forward when making headway (1/3 from bow), aft when making sternway.
2. Q: Transverse thrust effect?
   A: Propeller walk - sideways force from rotating propeller. Right-handed prop walks stern to port ahead, starboard astern.
3. Q: Shallow water effects?
   A: Increased turning radius, reduced maneuverability, squat, bank effects, increased stopping distance.
4. Q: Williamson turn steps?
   A: Hard over toward person, after 60° deviation hard over opposite, steady on 20° short of reciprocal course.
5. Q: Berthing starboard side?
   A: Approach at shallow angle, use sternway to bring stern in (transverse thrust), use springs, coordinate with tugs.
6. Q: Anchoring considerations?
   A: Depth, bottom type, swinging room, shelter, traffic, holding ground, cable length (5-7x depth).
7. Q: Short round technique?
   A: Turn vessel in confined space using engines, rudder, and transverse thrust. Useful for turning in narrow channels.
8. Q: Bank cushion effect?
   A: Bow pushed away from bank due to water pressure buildup. Counter with rudder toward bank.
9. Q: Bank suction effect?
   A: Stern pulled toward bank due to water velocity increase. Can cause sheer toward bank.
10. Q: Use of tugs?
    A: Assist with berthing/unberthing, provide lateral thrust, control head/stern, emergency towing. Give clear commands.