Revise with instant feedback: the moment you pick an answer you see whether it was right, with the explanation where available. Untimed — ideal before you sit a mock exam. Questions you miss keep coming back until you know them.
Exam-day conditions: no feedback until you submit, each module scored separately like the real test, with a full question-by-question review at the end.
The real exam is passed module by module: Rules of the Road requires 90%, most other modules 70%. Chart-plotting modules are taken on paper and not included.
The free sample gives you 20 to 30 questions per module. The full bank contains every available official question, with written explanations on the popular small-vessel credentials, one-off $29, lifetime access on up to 3 devices, all credentials included.
You must pass each module separately. Most modules require 70% to pass.
The exam covers 1 module: Navigation and Deck General – Safety.
This page includes free sample questions drawn from the official USCG sample examinations, with a full bank of around 50 questions across all modules available with lifetime access.
Every question comes from the U.S. Coast Guard National Maritime Center's published sample examinations, which are U.S. government works in the public domain. Wheelhouse Prep is not affiliated with or endorsed by the U.S. Coast Guard.
No. The free practice tests work in your browser with no signup. Your score history is saved on your own device.
A selection of free questions from the official USCG sample examinations. Use the interactive modules above for timed, scored drills.
The terms "ceiling" and "margin plate" are associated with which areas of the vessel?
How would the exhaust of a properly operating diesel engine appear?
Why: A properly operating diesel burns its fuel completely, so the exhaust is nearly invisible. Blue smoke means burning lube oil, black means overload or incomplete combustion, and white can mean water or unburned fuel.
By what means are indications of the master gyrocompass sent to remote repeaters?
Who must approve the vessel's trim and stability booklet?
Why: For U.S. inspected vessels the trim and stability booklet must be approved by the Coast Guard, which reviews the stability data and inclining experiment results during plan approval.
Your vessel is taking on fuel when a small leak develops in the hose. You order the pumping stopped. Before you resume pumping, you should __________.
In plugging submerged holes, why are rags, wedges, and other materials used in conjunction with plugs?
What is the purpose of a striking plate?
Aboard ship, which term is given to the vertical flat plates running transversely and connecting the vertical keel to the margin plates?
If a vessel takes a sudden, severe list or trim from an unknown cause, which action should you take FIRST?
Why: A sudden unexplained list could be negative GM, flooding, or shifted weight, and each requires a different remedy. Counterflooding or shifting weight against the wrong cause, such as negative GM, can capsize the vessel, so find the cause first.
Which is TRUE for the directive force acting on a gyrocompass?