1. Refrigeration Fundamentals
Key exam domainIdentify weak areas and improve with focused review.
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Pass the STAR Commercial Refrigeration Mastery exam with confidence.
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2. Refrigeration System Operation
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing3. Basic Electricity
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing4. Controls
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing5. Rack Systems
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing6. Self-Contained Units
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing7. Ice Machines
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing8. Auxiliary Systems
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing9. Business and Customer Relations
Key exam domainIdentify weak areas and improve with focused review.
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Frequently asked questions
Straight answers about the STAR exam, the questions, pricing, the free trial, and how this fits your prep.
The STAR exam spans 9 domains - Refrigeration Fundamentals, Refrigeration System Operation, Basic Electricity, Controls, Rack Systems, Self-Contained Units, Ice Machines, Auxiliary Systems, and Business and Customer Relations. Every practice question maps to one of them, so you train on exactly what's tested.
The STAR Commercial Refrigeration Mastery (STAR) exam has 194 questions and is completed in 2 hours 30 minutes. Our timed practice tests mirror that length and pacing, so exam day feels familiar.
No - and that matters. These are original practice questions written to mirror the style, difficulty, and domain coverage of the STAR exam blueprint. We never distribute actual exam content, so practicing here keeps you fully compliant with official exam policies.
No. STAR Exam Prep is an independent study resource for STAR Commercial Refrigeration Mastery (STAR). It is not affiliated with, sponsored by, or endorsed by the official certifying body or exam administrator.
Every paid plan unlocks the full bank of 1,000+ practice questions covering all 9 STAR domains - Refrigeration Fundamentals, Refrigeration System Operation, Basic Electricity, Controls, Rack Systems, Self-Contained Units, Ice Machines, Auxiliary Systems, and Business and Customer Relations. You can practice the whole bank, filter by domain, or run a timed, domain-balanced exam simulation.
Yes - the bank is maintained against the current exam outline, and questions are revised when the exam changes.
No honest practice platform can guarantee a pass. What realistic practice does is show you - before exam day - exactly which domains are weak, and give you the repetitions to fix them. That's the difference between hoping you're ready and knowing where you stand.
Yes. You get 10 free sample questions with instant feedback - no credit card and no account required.
The free sample shows you the question quality. Paid plans unlock the full 1,000+ question bank, exam-style practice modes, mistake review, and - on Fast Track and Pass Confidence - progress analytics that show your readiness by domain.
No. Every plan is a single one-time payment for a fixed access window - 48 hours, 7 days, or 6 weeks. There is no auto-renewal and no recurring billing.
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Yes - the whole platform is mobile-first: practice, mistake review, and analytics all work on any phone, tablet, or laptop with a browser. Nothing to install.
Every answer feeds your per-domain accuracy, readiness score, and weak-area list. Instead of re-reading everything, you drill the domains that are actually costing you points - that's what moves a score in days, not months.
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"put this off for weeks then crammed the last 10 days. the practice questions on controls and rack systems were basically what showed up on test day. passed with room to spare, still kinda shocked."
"honestly wasnt sure a website could actually help with something this hands on but starcommercialexam.com had a mistake review feature that showed me i kept blowing basic electricity questions. fixed that gap and passed first try."
"did the mock exams twice before test day, timing myself the second round. helped alot with pacing since 194 questions in 2.5 hrs is no joke. recieved my results and passed, pretty relieved tbh."