NG Navy Exam common mistakes
NG Navy Exam · Understand the traps and how to avoid them.
Reading the arithmetic word problem once, grabbing the two most visible numbers, and computing with them before identifying what quantity is actually being asked for.
Under time pressure candidates pattern-match to a familiar operation (usually multiplication or a simple division) instead of translating the final sentence of the question, which is where the requested quantity is stated.
What to do instead
Before any calculation, underline the question's final clause and write down the unit of the answer (dollars per hour, miles, total cost). Then list every given value with its unit and cross out any that the question does not require. If your computed answer's unit does not match the unit you wrote down, redo the setup rather than the arithmetic.
Stops at an intermediate result in a multi-step arithmetic problem and selects it as the answer because it appears among the choices.
Distractor options are deliberately built from partial computations, and the relief of finding a matching number ends the search prematurely.
What to do instead
Count the steps you expect before starting (for example: find the discount, subtract it, then add tax equals three steps). After computing, check that you performed all expected steps and that the number you are about to pick answers the final question, not the first or second stage.
Applies a memorized formula without checking the conditions that make it valid, such as using the Pythagorean theorem on a triangle whose right angle is not established, or averaging averages directly.
Formula recall is fast and feels authoritative, and the qualifying conditions are learned separately from the formula and rarely rehearsed together.
What to do instead
For each formula you use, state its precondition in one short phrase before substituting (right triangle, common denominator, equal group sizes). If the precondition is not met, switch method: drop an altitude to create right triangles, or weight the averages by group size.
Performs fraction, exponent, and order-of-operations work by writing cramped scratch work in the margin, then misreads their own handwriting and carries a digit error forward.
The exam gives limited scratch space and candidates try to save paper by squeezing steps, so transcription errors accumulate invisibly.
What to do instead
Number your scratch steps and give each line its own row, rewriting the expression after every simplification. When an answer is not among the choices, recompute from the original expression in fresh space rather than auditing the cramped work.
Chooses a word answer based on how the word sounds or on a single familiar root, without placing the word in the sentence to test whether the meaning fits the surrounding logic.
Word knowledge items often use words with deceptive roots or near-neighbors, and recognition memory triggers before the candidate checks contextual fit.
What to do instead
Substitute your candidate meaning into the sentence and read it back silently. Reject any meaning that makes the sentence illogical even if the word association feels strong. When two options both seem plausible, decide which one matches the sentence's tone and part of speech.
Treats a word as having one fixed meaning and ignores the possibility of a secondary or technical sense that the sentence is actually using.
Vocabulary is usually studied as one definition per word, so polysemous words are answered with the most common sense rather than the sense the context demands.
What to do instead
For high-frequency exam words (for example 'reserve', 'address', 'current', 'matter'), keep a short list of two or three senses and practice choosing the sense the sentence supports. Ask whether the sentence is literal or figurative before selecting.
Answers a paragraph comprehension question from prior knowledge or personal opinion about the topic rather than from what the passage states or implies.
Passages on science and military topics invite outside knowledge, and confident background knowledge overrides careful reading of the specific text.
What to do instead
Treat every question as answerable only from the passage. Locate and mark the sentence that supports your choice; if no sentence supports it, the option is wrong even if it is true in the world. For inference questions, require that the inference follow necessarily, not merely plausibly.
Misreads a negatively phrased or 'EXCEPT' question and selects the one true statement when asked for the false one, or the main idea when asked for a detail.
The stem is skimmed after the passage has consumed attention, and negation words are short and easy to miss.
What to do instead
Circle the operative words in the stem (EXCEPT, NOT, main idea, according to the author) before looking at options. For EXCEPT questions, evaluate each option against the passage and eliminate the three that are supported, leaving the unsupported one.
Confuses mass with weight, heat with temperature, or speed with velocity when answering physical science items, giving an answer that is dimensionally or conceptually wrong.
Everyday language uses these pairs interchangeably, and the exam deliberately tests the distinction in short items where the difference is the whole point.
What to do instead
Maintain a two-column list of confused pairs with the defining test for each (mass is amount of matter measured in kilograms and unchanged by location; weight is gravitational force in newtons and varies with gravity). Recite the defining test before answering any item containing one of these terms.
Answers a mechanical advantage or simple machine question by assuming the machine multiplies force, without tracing which end of the system the effort and load are on or accounting for friction and the actual distance moved.
The phrase 'mechanical advantage' suggests gain, and candidates do not draw the system, so they lose track of which quantity is input and which is output.
What to do instead
Sketch the lever, pulley set, or incline and label effort, load, effort distance, and load distance. Compute MA as load divided by effort and check it against distance ratio; remember that real machines deliver less than ideal MA because of friction, and that a machine trading force for distance does not create energy.
Applies series and parallel rules from memory in the wrong direction, for example adding resistances in a parallel circuit or assuming voltage is the same across series elements.
The two rule sets are mirror images and are learned close together, so they interfere under recall pressure, especially in mixed circuits.
What to do instead
Anchor each rule to a physical statement: current has one path in series so it is the same everywhere; voltage splits across series elements and is the same across parallel branches. Redraw mixed circuits into equivalent blocks before computing, and verify with the power equation that total power equals the sum of element powers.