100+ Free Chief Engineer 1AE01 Practice Questions
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Key Facts: Chief Engineer 1AE01 Exam
7
1AE01 exam modules (Q511-Q517)
USCG National Maritime Center
70
Multiple-choice questions per module
USCG NMC examination outline
70%
Minimum passing score per module
USCG NMC engineering exam standard
No exam
Raise of grade 1AE to Chief Engineer Unlimited
46 CFR 11.510
50%
Service required on 4,000 HP / 3,000 kW vessels
46 CFR 11.510
3,000 kW
STCW III/2 management-level propulsion threshold
STCW Regulation III/2
15 ppm
Machinery-space oily bilge discharge limit
MARPOL Annex I / 33 CFR 155
The 1AE01 is the USCG management-level engineer license exam taken by mariners qualifying as First Assistant Engineer (and, by raise of grade, Chief Engineer) on unlimited-horsepower vessels. It is delivered by the National Maritime Center as modules Q511-Q517, each multiple choice with a 70% pass mark: two General Subjects papers, plus plant-specific Steam (Q513), Motor (Q514), and Gas Turbine (Q515) modules taken according to the candidate's propulsion-mode sea service, an Engineering Safety and Environmental Protection module (Q516), and an Electricity, Electronics and Control module (Q517). Content spans management-level marine engineering: boiler and turbine casualty control, diesel turbocharging and crankcase safety, gas-turbine theory, naval architecture for engineers, AC power generation and distribution, automation, and SOLAS/MARPOL/46 CFR regulations. Raise of grade from First Assistant to Chief Engineer Unlimited is granted on sea service alone, without another written exam (46 CFR 11.510); the STCW III/2 endorsement adds approved training and competence assessments under 46 CFR 11.325.
Sample Chief Engineer 1AE01 Practice Questions
Try these sample questions to test your Chief Engineer 1AE01 exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1On the USCG management-level engineer license, an applicant who already holds First Assistant Engineer Unlimited (1AE) and meets the sea-service requirement may obtain a Chief Engineer Unlimited endorsement under 46 CFR 11.510 by:
2Each module of the 1AE01 management-level examination (Q511 through Q517) requires a minimum passing score of:
3The 1AE01 examination module Q515 covers Gas Turbine Plants. An applicant who has all sea service exclusively on motor (diesel) vessels would typically take which set of plant modules?
4For a 360-day raise of grade to Chief Engineer Unlimited, at least how much of the qualifying service as First Assistant Engineer must be on vessels of 4,000 HP/3,000 kW or more?
5In a saturated-steam boiler operating at 600 psig, the primary purpose of the superheater is to:
6When lighting off a marine watertube boiler from cold, the air registers and forced-draft fan are used to purge the furnace before introducing fuel primarily to:
7Excessive carryover of boiler water into the superheater and turbine is most commonly caused by:
8In a marine steam propulsion plant, the deaerating feed tank (DFT) serves two principal functions. They are to:
9A marine steam turbine is fitted with a gland sealing system. During normal full-power operation, the high-pressure gland seals are supplied with:
10The condenser vacuum in a marine steam plant is being lost. Of the following, the FIRST item to investigate is:
About the Chief Engineer 1AE01 Exam
The 1AE01 examination is the U.S. Coast Guard management-level written exam for First Assistant Engineer Unlimited, administered by the National Maritime Center. It consists of modules Q511 General Subjects I, Q512 General Subjects II, Q513 Steam Plants, Q514 Motor Plants, Q515 Gas Turbine Plants, Q516 Engineering Safety and Environmental Protection, and Q517 Electricity, Electronics and Control Engineering. Each module is multiple choice and requires at least 70% to pass. There is no separate Chief Engineer Unlimited written exam: a holder of First Assistant Engineer Unlimited raises grade to Chief Engineer Unlimited on additional qualifying sea service, without further examination, under 46 CFR 11.510.
Questions
420 scored questions
Time Limit
Timed per module under NMC examination rules
Passing Score
70% on each module
Exam Fee
USCG MMC application/exam fees per NMC schedule (U.S. Coast Guard National Maritime Center (NMC))
Chief Engineer 1AE01 Exam Content Outline
General Subjects (Q511 & Q512)
Thermodynamics and Carnot efficiency, fuels and lubricants, flash point and BN, pumps, cavitation and NPSH, positive-displacement pump relief, heat exchangers, purifiers and clarifiers, refrigeration TXV, fresh-water evaporators, and naval architecture (GM, free surface effect, trim).
Steam Plants (Q513)
Watertube boiler light-off and furnace purge, superheaters, deaerating feed tanks, feedwater regulators, carryover, continuous blowdown, low-water casualty, condenser vacuum and gland sealing, steam turbine warming-through, overspeed trips, reduction gears, and astern turbines.
Motor Plants (Q514)
Crosshead engine construction, crankcase explosions and oil mist detectors, turbocharger surge and scavenging, heavy fuel viscosity control, cylinder lubrication and TBN, scavenge fires, starting-air systems and explosions, indicator diagrams, CPP, and exhaust gas economizers.
Gas Turbine Plants (Q515)
Brayton cycle, axial compressor function and surge, variable stator vanes and bleed valves, free power turbines, EGT monitoring and hot starts, recuperators, hot corrosion and salt ingestion, and gas-turbine starting and cool-down shutdown.
Engineering Safety & Environmental (Q516)
MARPOL Annexes I-VI, 15 ppm oily-water separators and Oil Record Book, CO2 and dry-chemical fire fighting, SCBA, enclosed-space gas testing, bunkering precautions, sewage/garbage discharge rules, ballast water D-2 standard, incinerator limits, hot work, and lockout/tagout.
Electricity, Electronics & Control (Q517)
Three-phase wye/delta relationships, generator synchronizing and kW/kVAR load sharing, reverse power and single-phasing protection, insulated systems and ground detection, motors, VFDs, diodes and rectifiers, PID control, pneumatic 3-15 psi signals, UMS alarms, and cathodic protection.
How to Pass the Chief Engineer 1AE01 Exam
What You Need to Know
- Passing score: 70% on each module
- Exam length: 420 questions
- Time limit: Timed per module under NMC examination rules
- Exam fee: USCG MMC application/exam fees per NMC schedule
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
Chief Engineer 1AE01 Study Tips from Top Performers
Frequently Asked Questions
Is there a separate Chief Engineer Unlimited written exam?
No. The management-level written exam is the 1AE01 (modules Q511-Q517) taken for First Assistant Engineer Unlimited. Under 46 CFR 11.510, a First Assistant Engineer Unlimited raises grade to Chief Engineer Unlimited on additional qualifying sea service, without a further written examination.
What modules make up the 1AE01 exam?
Q511 General Subjects I, Q512 General Subjects II, Q513 Steam Plants, Q514 Motor Plants, Q515 Gas Turbine Plants, Q516 Engineering Safety and Environmental Protection, and Q517 Electricity, Electronics and Control Engineering.
Do I have to take all three plant modules (steam, motor, gas turbine)?
No. Plant-specific modules are taken according to the propulsion mode of your qualifying sea service. A motor-only applicant takes Q514 Motor Plants and the four common modules; steam or gas turbine modules are added only for service on those propulsion types.
What is the passing score?
Each module requires a minimum of 70% to pass, per NMC engineering examination standards. Modules can generally be taken and passed individually.
How many questions are on the exam?
Each module contains 70 multiple-choice questions. A typical motor-path candidate sits about six modules (around 420 questions); the total depends on which plant modules apply to your service.
How does the STCW management-level endorsement relate to the 1AE01?
The STCW III/2 endorsement for Chief Engineer/Second Engineer on ships of 3,000 kW or more is gained through approved training and assessment of competence against STCW Table A-III/2 (46 CFR 11.325), not through another national written exam.
Who administers the exam?
The U.S. Coast Guard National Maritime Center (NMC) administers the merchant mariner engineer examinations and issues the Merchant Mariner Credential (MMC) endorsements.