ASA 104 - Bareboat Cruising Certification Exam Includes Diesel
Engines, Anchoring, MOB, Weather, Docking &
Reefing|Aplusexports|Instant pdf
100 Practice Questions with Answers & Detailed Rationales
Introduction
This comprehensive practice exam simulates the ASA 104 Bareboat Cruising Certification. It covers diesel engines,
anchoring, man overboard (MOB) recovery, weather interpretation, docking maneuvers, and reefing techniques.
1. What is the preferred approach to dock when wind is pushing you onto the dock?
A) Approach at 45° with bow into the wind, use forward gear and spring line
B) Approach parallel at slow speed, let the wind blow you against the dock
C) Approach bow‑out at 20°, reverse engine to hold position
D) Approach stern‑first with bow pointing upwind
Answer B: Approach parallel at slow speed, let the wind blow you against the dock
Rationale: Wind pushing onto dock aids gentle contact, requiring only fenders and a forward spring line to control
movement.
2. Your diesel engine overheats after 30 minutes at cruising RPM. Sea strainer is clean. What is the most likely
cause?
A) Air in the fuel system
B) Broken thermostat stuck closed
C) Low battery voltage
,D) Clogged injector nozzles
Answer B: Broken thermostat stuck closed
Rationale: Thermostat stuck closed prevents coolant from reaching heat exchanger, causing rapid overheating
under load.
3. What symptom indicates a failed raw water impeller?
A) White smoke from exhaust
B) Overheating and no water from exhaust
C) Loss of RPM and black smoke
D) Oil pressure drop below 10 psi
Answer B: Overheating and no water from exhaust
Rationale: Impeller failure stops raw water flow; exhaust becomes dry and engine overheats within minutes.
4. While anchoring in a 6‑foot tidal range, you set a scope of 5:1. After 4 hours, depth has increased by 3 feet. What
is your effective scope now?
A) 4.2:1
B) 5.0:1
C) 3.8:1
D) 4.6:1
Answer A: 4.2:1
Rationale: Original depth + tide increase = new depth; rode length unchanged → 5 × original depth / new depth =
4.17:1.
, 5. You are sailing at 6 knots on a beam reach. True wind is 15 knots from 45° off the bow. Apparent wind speed and
angle are:
A) 20 knots at 30° off bow
B) 18 knots at 50° off bow
C) 21 knots at 40° off bow
D) 22 knots at 35° off bow
Answer A: 20 knots at 30° off bow
Rationale: Vector addition yields apparent wind ≈20 knots; angle narrows because boat speed adds to true wind
component.
6. What is the correct procedure after recovering a MOB onto the cockpit?
A) Immediately restart the engine and continue passage
B) Place victim in recovery position, monitor breathing, and call for medical advice
C) Give the victim fresh water and food
D) Hoist the MOB flag and log the incident only
Answer B: Place victim in recovery position, monitor breathing, and call for medical advice
Rationale: Hypothermia and drowning complications require immediate medical assessment; engine restart comes
later.
Engines, Anchoring, MOB, Weather, Docking &
Reefing|Aplusexports|Instant pdf
100 Practice Questions with Answers & Detailed Rationales
Introduction
This comprehensive practice exam simulates the ASA 104 Bareboat Cruising Certification. It covers diesel engines,
anchoring, man overboard (MOB) recovery, weather interpretation, docking maneuvers, and reefing techniques.
1. What is the preferred approach to dock when wind is pushing you onto the dock?
A) Approach at 45° with bow into the wind, use forward gear and spring line
B) Approach parallel at slow speed, let the wind blow you against the dock
C) Approach bow‑out at 20°, reverse engine to hold position
D) Approach stern‑first with bow pointing upwind
Answer B: Approach parallel at slow speed, let the wind blow you against the dock
Rationale: Wind pushing onto dock aids gentle contact, requiring only fenders and a forward spring line to control
movement.
2. Your diesel engine overheats after 30 minutes at cruising RPM. Sea strainer is clean. What is the most likely
cause?
A) Air in the fuel system
B) Broken thermostat stuck closed
C) Low battery voltage
,D) Clogged injector nozzles
Answer B: Broken thermostat stuck closed
Rationale: Thermostat stuck closed prevents coolant from reaching heat exchanger, causing rapid overheating
under load.
3. What symptom indicates a failed raw water impeller?
A) White smoke from exhaust
B) Overheating and no water from exhaust
C) Loss of RPM and black smoke
D) Oil pressure drop below 10 psi
Answer B: Overheating and no water from exhaust
Rationale: Impeller failure stops raw water flow; exhaust becomes dry and engine overheats within minutes.
4. While anchoring in a 6‑foot tidal range, you set a scope of 5:1. After 4 hours, depth has increased by 3 feet. What
is your effective scope now?
A) 4.2:1
B) 5.0:1
C) 3.8:1
D) 4.6:1
Answer A: 4.2:1
Rationale: Original depth + tide increase = new depth; rode length unchanged → 5 × original depth / new depth =
4.17:1.
, 5. You are sailing at 6 knots on a beam reach. True wind is 15 knots from 45° off the bow. Apparent wind speed and
angle are:
A) 20 knots at 30° off bow
B) 18 knots at 50° off bow
C) 21 knots at 40° off bow
D) 22 knots at 35° off bow
Answer A: 20 knots at 30° off bow
Rationale: Vector addition yields apparent wind ≈20 knots; angle narrows because boat speed adds to true wind
component.
6. What is the correct procedure after recovering a MOB onto the cockpit?
A) Immediately restart the engine and continue passage
B) Place victim in recovery position, monitor breathing, and call for medical advice
C) Give the victim fresh water and food
D) Hoist the MOB flag and log the incident only
Answer B: Place victim in recovery position, monitor breathing, and call for medical advice
Rationale: Hypothermia and drowning complications require immediate medical assessment; engine restart comes
later.
