CHP Officer study materials
CHP Officer study resources

CHP Officer common mistakes

CHP Officer · Understand the traps and how to avoid them.

Mistake 1

Picking the answer choice that matches how real police work or real life usually works, rather than finding the statement actually supported by the passage.

Candidates with academy, ride-along, or life experience read the passage as a prompt and then answer from memory; the passage-based items are built so that a confidently 'true' outside statement is the most attractive distractor.

What to do instead

Before choosing, put a finger on the sentence or pair of sentences that proves the choice. If you cannot point to text, cross the choice out even if you believe it is true. Practice by writing the line number next to every answer you select.

Mistake 2

Selecting the first answer that sounds plausible and moving on without reading the other three choices.

Time pressure plus answer choices that recycle vocabulary from the passage make an early option feel correct; the recycled wording creates false familiarity.

What to do instead

Cover the choices, state the answer in your own words, then read all four. Eliminate two, and only then decide between the survivors. Mark any item you finish in under ten seconds and re-check it at the end.

Mistake 3

Skipping over qualifiers in the question stem - EXCEPT, NOT, LEAST, BEST, according to the passage - and answering the opposite of what was asked.

Under time pressure the eye fixates on the content words of the stem and drops the small capitalised ones; the brain then solves the far more natural question 'which one is true'.

What to do instead

Underline or circle the qualifier the moment you read the stem, then restate the stem silently as a task ('three of these are in the passage; find the one that is not'). On EXCEPT items, tick the three choices that satisfy the stem so the leftover one is visibly the answer.

Mistake 4

Applying a word's most common everyday meaning when the sentence requires a secondary meaning, or judging a word only by positive/negative feel.

Vocabulary items deliberately use words with several senses (e.g. 'charge', 'book', 'party', 'address') and near-synonyms that differ only in connotation or formality, so the first meaning retrieved is often wrong.

What to do instead

Substitute each candidate meaning back into the sentence as a whole clause and test grammatical fit as well as sense. When two choices remain, break the word into prefix, root and suffix and compare the emotional charge of each option to the passage's tone.

Mistake 5

Spelling by sound - writing 'definately', 'seperate', 'occured', 'recieve', 'accomodate', or swapping homophones such as principal/principle and stationary/stationery.

English spelling is not phonetic; unstressed vowels collapse to a schwa when spoken, so the ear supplies the wrong letter. Homophones are especially dangerous because the misspelling is a real word and the spell-check eye skips it.

What to do instead

Build a personal error log of the 20-30 words you actually miss and drill them by pattern group (-able/-ible, -ance/-ence, single vs double consonant before -ed/-ing). For homophones, memorise one anchor sentence per pair ('the principal is your pal'; 'stationery has an e for envelope') and say the word syllable by syllable when proofreading.

Mistake 6

Missing double-letter and silent-letter traps such as 'untill', 'occassion', 'begining', 'maintainance', or adding and dropping suffixes incorrectly (change + able, hope + ing).

These words look right at a glance because the error is one letter and reading processes whole word shapes rather than individual letters.

What to do instead

Read spelling and proofreading items backwards, last word to first, so shape-recognition cannot carry you. Then check the suffix rule explicitly: does the final consonant double, does a final e drop, does y become i.

Mistake 7

Getting subject-verb agreement wrong when a prepositional phrase, a parenthetical, or inverted word order separates the subject from the verb (e.g. 'The box of files was...', 'There were three officers...').

The noun nearest the verb feels like the subject, and inverted constructions hide the real subject after the verb.

What to do instead

Cross out every phrase between the subject and the verb, locate the true subject, and say the sentence aloud with just those two words. For 'there is/are' and question forms, rewrite the sentence in ordinary subject-first order before judging.

Mistake 8

Joining two complete sentences with only a comma, or misusing which/that and pronoun case in the correction items (e.g. 'between you and I').

Comma splices mirror speech, where a pause is enough; and candidates apply the rule 'which sounds more formal' rather than the grammatical test for restrictive versus non-restrictive clauses.

What to do instead

Count the main clauses first: if a sentence has two subjects and two working verbs without a conjunction, the comma is wrong. For which/that, delete the clause - if the sentence still identifies the same thing, use a comma plus 'which'; if the meaning collapses, use 'that'. For pronoun case, drop the other person ('between I' fails) to expose the correct form.

Mistake 9

Setting up percent and ratio word problems against the wrong base, or confusing 'percent of' with 'percent increase/decrease' and 'of' with 'more than'.

Word problems bury the base amount in a subordinate clause, and the number that appears last in the sentence is often not the base.

What to do instead

Before computing, write an equation with units attached ('discount = 0.20 x original price') and label which quantity is the base. Estimate the answer first to the nearest convenient number; any result far from your estimate signals a reversed setup.

Mistake 10

Losing points on multi-step arithmetic through misaligned decimal places, unconverted units, or leaving answers in the wrong form - and running out of time on the last items.

The arithmetic section is calculator-free and timed, so hand computation errors and one slow problem cascade into several unanswered questions.

What to do instead

Line up decimal points vertically and carry a rough magnitude check on every multiplication and division. Convert units to one system at the start of a problem. Work the section in two passes - solve everything you can in one pass, flag the rest, and use the remaining time on flagged items, plugging answer choices back into the problem instead of re-solving from scratch.