5.1 Test-Taking Strategies for the CST Exam

Know the Format Before You Strategize

The National Board of Surgical Technology and Surgical Assisting (NBSTSA) Certified Surgical Technologist (CST) exam is a computer-based test delivered at PSI testing centers. It contains 175 multiple-choice questions: 150 are scored and 25 are unscored pretest items seeded randomly throughout the exam so the board can validate future questions. You cannot tell which items are pretest, so treat every question as if it counts.

You have 4 hours (240 minutes) to finish. Each question is single-best-answer with four options. To pass, you must answer approximately 98 of the 150 scored questions correctly — about 65%. The exam is criterion-referenced, meaning your score is measured against a fixed standard, not curved against other test-takers. Everyone who meets the standard can pass; you are never competing for a limited number of seats.

Do the Pacing Math

With 240 minutes for 175 questions, your budget is roughly 82 seconds per question — call it about 1 minute 20 seconds. That is generous for recall items ("Which instrument is a Yankauer?") but tight if you stall on a multi-step scenario. The discipline is simple: keep moving.

Glance at the on-screen clock at each quarter. If you are running behind, it is almost always because you are over-thinking recall items, not because the test is too long. Answer what you know instantly, flag what you don't, and protect a 15-minute buffer at the end for flagged questions and a final blank-check sweep.

Read NBSTSA "Best-Answer" Questions Correctly

Many CST items are best-answer, not strictly true-or-false: two or three options can be defensible, but one is most correct for the situation described. Train these habits:

• Read the stem twice and find the qualifier. Words like first, next, most important, priority, initial, and best change the entire answer. "What does the CST do first when a sharp count is incorrect?" has a different answer than "What does the CST do about an incorrect count?"
• Cover the options and predict. Form your own answer before reading the choices so distractors don't pull you off course.
• Eliminate to two. You can almost always strike two clearly wrong options, turning a 25% guess into a 50% decision.
• Watch absolutes. Always and never are frequently wrong in clinical items, but in sterile-technique rules they are often right (a sterile field is never left unattended; a contaminated item is always removed). Judge by the principle, not the word.

The Tie-Breaker: Safety and Sterility Win

When you are genuinely split between two answers, apply the CST hierarchy of values in this order:

1. Patient safety (correct patient, correct site, no retained item, no injury).
2. Sterile-field integrity (when in doubt, consider it contaminated).
3. Surgeon/team and procedure flow.
4. Efficiency and economy of motion.

The option that protects the patient or preserves the sterile field is the best answer far more often than the one that saves time. "Re-establish the sterile field" beats "continue the procedure to avoid delay" almost every time.

Flag-and-Return, Then Guess Smart

The PSI interface lets you mark (flag) a question and move on, then jump back via a review screen. Use a disciplined two-pass system:

• Pass 1: Answer every item you're sure of, select an answer even on flagged ones (a placeholder beats a blank if you run out of time), flag the uncertain ones, and never burn more than ~90 seconds on a single question.
• Pass 2: Return to flagged items with your time buffer. Fresh eyes and the context of later questions often unlock them.

Because there is no penalty for wrong answers, you must answer all 175 — a blank is a guaranteed zero, while a guess on a 50/50 question is worth half a point on average. Do a final sweep on the review screen to confirm nothing is unanswered. Resist changing answers without a concrete reason; your first instinct on recall content is usually right, and second-guessing introduces error more often than it fixes it.

Decode the Distractors

NBSTSA distractors are written to be plausible, not random, so understanding how they are built lets you eliminate faster:

• The look-alike instrument. A stem about a fine, atraumatic vascular forceps lists DeBakey (correct) alongside Adson and tissue forceps (toothed, traumatic). If you know that vascular and bowel work demands atraumatic graspers, the toothed options fall away.
• The right action, wrong timing. Several options describe correct steps but only one matches the first or next step the qualifier asks for. Calling the surgeon is correct for an unreconciled count, but the very first action is to recount and search the field.
• The almost-right number. Temperature/time parameters and count timing appear as near-miss numbers (250°F vs. 270°F; "before closure" vs. "after closure"). Memorize the exact figures so look-alikes don't trap you.
• The unsafe shortcut. Any option that compromises sterility, skips a count, or bypasses patient verification is almost always a distractor, however efficient it sounds.

Manage Stress and Stamina

Four hours is a long sitting, and fatigue causes careless errors late in the exam. Build stamina in practice so test day feels familiar. During the exam, you may take a restroom break, but the clock keeps running, so use breaks sparingly. If you hit a string of hard questions and feel panic rising, take three slow breaths, flag the worst one, and move to a question you can answer to rebuild momentum. Confidence is cumulative: stacking up answered items keeps your pace and morale up.

Read the entire stem and every option before selecting — skimming is the leading cause of avoidable misses, because the correct answer frequently sits in the last option a rushed reader never reaches.