100+ Free Asst Eng UFIV Practice Questions
Prepare for the USCG Assistant Engineer Uninspected Fishing Industry Vessels (UFIV) exam with instant access — no signup required.
Loading practice questions...
Explore More USCG Captain Licenses
Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.
More From This Family
Videos and articles for deeper review.
Key Facts: Asst Eng UFIV Exam
150
Total Questions (Motor Path)
USCG NMC UFIV02 (3 × 50)
70%
Passing Score per Module
USCG NMC UFIV02
50
Questions per Module
USCG NMC UFIV02 Q690/Q692/Q693
3 years / 2/3 motor
Service Requirement
46 CFR 11.530
$240
Typical Original Fee Total
46 CFR 10.219 lower-level
15 ppm
Bilge Oil Discharge Limit
MARPOL Annex I
≥200 GRT
Typical UFIV Vessel Application
46 CFR 11.530
The Assistant Engineer UFIV (NMC code UFIV02) is a U.S. Coast Guard merchant marine engineer endorsement for assistant engineers on uninspected fishing industry vessels. Candidates qualify under 46 CFR 11.530 with three years of engineroom service, two-thirds on motor vessels, generally for vessels of 200 GRT or more (with listed exceptions). The original motor-path exam is modular multiple choice: Q690 Motor Plants (50Q), Q692 Engineering Safety & Environmental Protection (50Q), and Q693 General Subjects (50Q), each requiring 70%. Typical original lower-level fees are $100 evaluation + $95 exam + $45 issuance ($240) under 46 CFR 10.219. Content emphasizes fishing-vessel and workboat diesel engineering, MARPOL bilge and pollution rules, and auxiliaries such as pumps, refrigeration, hydraulics, and electrical systems.
Sample Asst Eng UFIV Practice Questions
Try these sample questions to test your Asst Eng UFIV exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1On a marine diesel engine, what is the primary purpose of fuel injection timing?
2A diesel engine will not rotate when starting air is admitted, although air pressure is normal. The most likely cause is that the:
3In a four-stroke-cycle diesel engine, how many crankshaft revolutions complete one full cycle in each cylinder?
4What is the chief function of scavenging in a two-stroke marine diesel?
5Many fishing vessels cool the main engine with a keel cooler instead of a raw-water heat exchanger because a keel cooler:
6On a four-stroke marine diesel, the camshaft is driven at:
7Blue or blue-grey exhaust smoke from a marine diesel typically indicates:
8On a fishing-vessel main diesel, the fuel oil viscosity controller is primarily intended to:
9What is the primary purpose of a charge-air (after) cooler on a turbocharged marine diesel?
10If turbocharger compressor fouling reduces airflow on a workboat diesel under load, the engineer should expect:
About the Asst Eng UFIV Exam
The USCG Assistant Engineer of Uninspected Fishing Industry Vessels endorsement (NMC exam code UFIV02) authorizes service as assistant engineer on uninspected fishing industry vessels. Under 46 CFR 11.530, the endorsement generally applies to fishing industry vessels of 200 gross register tons or more, with exceptions for wooden vessels of primitive build, unrigged vessels, and vessels under 200 GRT. Qualification requires three years of engineroom service, of which two-thirds must have been on motor vessels. The written examination for the original motor path comprises three multiple-choice modules—Q690 Motor Plants, Q692 Engineering Safety & Environmental Protection, and Q693 General Subjects—each 50 questions with a 70 percent passing score. An orally assisted examination option exists under 46 CFR 11.530(f).
Assessment
UFIV02 modular REC battery for original motor path: Q690 Motor Plants (50, 70%), Q692 Engineering Safety & Environmental Protection (50, 70%), Q693 General Subjects (50, 70%). Total 150 multiple-choice questions. An orally assisted examination option is available under 46 CFR 11.530(f) when eligible.
Time Limit
Up to 3.5 hours per module
Passing Score
70% on each module
Exam Fee
$95 exam fee; $240 total typical original lower-level application ($100 evaluation + $95 exam + $45 issuance) (U.S. Coast Guard National Maritime Center (NMC) / Regional Exam Centers)
Asst Eng UFIV Exam Content Outline
Motor Plants (Q690)
Diesel engine fundamentals and two- and four-stroke cycles on fishing and workboat plants, fuel injection and timing, fuel viscosity and heating, turbocharging, scavenging and charge-air cooling, governors, cooling and lubrication systems, starting air safety, reduction gear and controllable-pitch propeller concepts, and casualty control including hot bearings, oil mist, and crankcase explosions
Engineering Safety & Environmental Protection (Q692)
Fire triangle and fire classes, portable extinguishers and fixed CO2/foam systems, SCBA and enclosed-space entry, lockout/tagout, damage control and dewatering, MARPOL 15 ppm machinery-space bilge discharge and the Oil Record Book, OPA 90 spill response, garbage Annex V (plastics prohibition), and hazardous materials/SDS on commercial fishing vessels
General Subjects (Q693)
Centrifugal and positive-displacement pumps, priming and cavitation, fuel and lube oil purifiers, oily water separators, refrigeration and fish-hold cooling, hydraulics and deck machinery, AC generation and motor controllers, heat exchangers and zinc anodes, valves and piping, and engineer watchstanding duties
How to Pass the Asst Eng UFIV Exam
What You Need to Know
- Passing score: 70% on each module
- Assessment: UFIV02 modular REC battery for original motor path: Q690 Motor Plants (50, 70%), Q692 Engineering Safety & Environmental Protection (50, 70%), Q693 General Subjects (50, 70%). Total 150 multiple-choice questions. An orally assisted examination option is available under 46 CFR 11.530(f) when eligible.
- Time limit: Up to 3.5 hours per module
- Exam fee: $95 exam fee; $240 total typical original lower-level application ($100 evaluation + $95 exam + $45 issuance)
Keys to Passing
- Work through all 100 available questions
- Review every answer and explanation
- Track weak areas and revisit them
- Use our AI tutor for tough concepts
Asst Eng UFIV Study Tips from Top Performers
Frequently Asked Questions
What does the Assistant Engineer UFIV endorsement authorize?
The USCG Assistant Engineer of Uninspected Fishing Industry Vessels endorsement authorizes service as assistant engineer on uninspected fishing industry vessels under 46 CFR 11.530. The endorsement generally applies to fishing industry vessels of 200 gross register tons or more, with exceptions for wooden vessels of primitive build, unrigged vessels, and vessels of less than 200 GRT.
How is the UFIV02 Assistant Engineer exam structured?
The original motor-path exam (NMC code UFIV02) is delivered as three separate multiple-choice modules: Q690 Motor Plants (50 questions), Q692 Engineering Safety & Environmental Protection (50 questions), and Q693 General Subjects (50 questions). Each module requires a 70 percent passing score and is graded independently, for a total of 150 questions.
What experience is required under 46 CFR 11.530?
Under 46 CFR 11.530, applicants for Assistant Engineer of Uninspected Fishing Industry Vessels must document three years of service in the engineroom of vessels, of which two-thirds of the required service must have been on motor vessels, plus the medical, drug-testing, and MMC documentation required for credential issuance.
Is an orally assisted exam available?
Yes. 46 CFR 11.530(f) provides for an orally assisted examination option for eligible Assistant Engineer UFIV applicants. Confirm current eligibility and procedures with the National Maritime Center and your Regional Exam Center when you apply.
What is the passing score on each UFIV02 module?
Each module is graded independently and requires a minimum passing score of 70 percent. Candidates may take and pass the modules separately, and only the failed module(s) must be retaken if a candidate does not pass the full set.
How much does the Assistant Engineer UFIV exam cost?
For a typical original lower-level officer endorsement under 46 CFR 10.219, expect about $100 evaluation, $95 examination, and $45 issuance ($240 total). Fees are paid through Pay.gov. Confirm current amounts on the NMC fees page before applying.
What topics are emphasized for fishing-vessel engineers?
UFIV assistant engineer candidates should master marine diesel plants typical of fishing and workboats, machinery-space firefighting and enclosed-space safety, MARPOL bilge discharge and pollution prevention, and auxiliaries such as pumps, refrigeration for fish holds, hydraulics for deck machinery, and shipboard electrical generation and motor control.
Is this practice bank an official Coast Guard exam?
No. OpenExamPrep provides a FREE English multiple-choice study aid aligned to the UFIV02 Q690, Q692, and Q693 topic areas. Official exams are administered by the Coast Guard at Regional Exam Centers using current NMC banks.