Study guide
A timed CRCST mock exam
How the timed CRCST Practice mock works: 150 questions weighted to the November 2023 outline, 3 hours, review after you submit, and how it differs from HSPA's.
Last reviewed November 4, 2026
What you are practicing
A CRCST Practice mock is 150 original multiple-choice questions and a 180-minute clock. Counts per domain follow the November 2023 weights using largest-remainder rounding. You do not see explanations until you submit. Unanswered questions are wrong. You can mark items and move around, which is the skill the Prometric tutorial is for.
HSPA's exam form hides 25 unscored pretest questions inside the 150. Ours does not. Every practice item is scored, so a mock percentage is not HSPA's scaled score. Use it to find the domain that will cost you the attempt.
Try five questions
Five original questions. Answer each one to see the explanation and its public source. The full bank has 491.
Sterilization Process
The OR asks for immediate-use steam sterilization (IUSS) of a set so they do not have to buy another one. What is the issue?
Common questions
Can I pause the mock?
The clock keeps running. Leave and come back in the same browser and the end time is unchanged, because it is stored when you start.
Is the mock free?
The 25-question quiz is free. Timed mocks are part of paid access: Sprint is $19 for 7 days, and the 90-day plan is $39.