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Engine · 2026 NMC sample exam Q730–Q750

MODU – Chief Engineer Practice Test

Every module on the National Maritime Center's 2026 sample examination for MODU – Chief Engineer: 3 modules, 210 real questions, graded instantly.

★★★★★ Trusted by mariners since 2008 Sample exam dated September 10, 2026

The MODU – Chief Engineer exam is split into 3 modules, each graded separately. The table below is the National Maritime Center's own 2026 sample examination for this credential, module by module, with every question matched to our bank of released U.S. Coast Guard exam questions. Open a module to practice its questions one at a time, or sit the whole module as a timed exam.

What is on the MODU – Chief Engineer exam

Most modules require 70 percent to pass; Rules of the Road modules require 90 percent.

Q730 · 70 questions · 13 illustrations

Motor Plants

  1. 1. Which of the following statements is correct concerning the connecting rod and piston assembly shown in the illustration? Illustration MO-0011
  2. 2. Ring groove inserts are occasionally used on aluminum alloy pistons to __________.
  3. 3. The lower water seal on a diesel engine wet cylinder liner must allow for liner axial movement. This seal is most commonly a __________.
  4. 4. Item #16 of the piston shown in the illustration is a/an __________.
  5. 5. Trunk type diesel engine pistons are effectively cooled when heat is __________.

Showing the first 5 of 70. Start at question 1 and use Next to work through the module →

Q740 · 70 questions · 6 illustrations

Engineering Safety & Environmental Protection

  1. 1. The safe and efficient use of the facepiece of a self-contained breathing apparatus is directly influenced by __________.
  2. 2. Which of the following statements is TRUE concerning life jackets?
  3. 3. A rigid lifesaving device designed for a group of survivors to hold on to while in the water is defined as a _______.
  4. 4. An immersion suit should be equipped with a/an __________.
  5. 5. With the sprinkler system and air system on, and all hatches shut, the survival craft will be protected from __________.

Showing the first 5 of 70. Start at question 1 and use Next to work through the module →

Q750 · 70 questions · 13 illustrations

General Subjects

  1. 1. A hydraulic flow control circuit is shown in the illustration and is known as a __________.
  2. 2. The line labeled "E", as shown in the illustration, would be identified as the ______.
  3. 3. As shown in the illustration, a section of standard weight, seamless steel pipe, has an external diameter of 4.0 inches. When the pipe, is bent into a 90-degree...
  4. 4. Regarding the illustrated pump, what is the distance from the bottom of the inlet to the bottom end of the motor shaft?
  5. 5. Where would you find a list of the firefighting equipment required on your vessel?

Showing the first 5 of 70. Start at question 1 and use Next to work through the module →

MODU – Chief Engineer exam FAQ

Q How many questions are on the MODU – Chief Engineer exam?

The National Maritime Center's 2026 sample examination for MODU – Chief Engineer has 210 questions across 3 modules: Q730 Motor Plants (70 questions), Q740 Engineering Safety & Environmental Protection (70 questions) and Q750 General Subjects (70 questions). Every one is multiple choice with four answers, and you can practice all of them on this page.

Q What modules are on the MODU – Chief Engineer exam?

The modules are Q730 Motor Plants (70 questions), Q740 Engineering Safety & Environmental Protection (70 questions) and Q750 General Subjects (70 questions). Each module is graded separately, so you need to pass every one to pass the exam.

Q What score do I need to pass the MODU – Chief Engineer exam?

Most USCG exam modules require 70 percent to pass; Rules of the Road modules, where they apply, require 90 percent. Check the specific requirements for your endorsement with the National Maritime Center.

Q Are these the real questions?

Yes. They are the questions on the National Maritime Center's published 2026 sample examination for MODU – Chief Engineer (modules Q730–Q750), matched to our bank of released U.S. Coast Guard exam questions. The exam you sit draws from the same pools.

Q Can I take a timed MODU – Chief Engineer practice exam?

Yes. Subscribers can sit any module as an official sample exam in its published order, timed or untimed, with answers revealed at the end. Free accounts can build one 10-question practice exam and answer questions on every module page.

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