1. Refrigeration fundamentals
9% of the examIdentify weak areas and improve with focused review.
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Free CARO Practice Test
Pass the Certified Assistant Refrigeration Operator exam with confidence.
Start with a free CARO practice test and build exam-ready confidence for the Certified Assistant Refrigeration Operator exam.
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1000+CARO Questions
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Everything your CARO certification prep needs
Practice expert-vetted questions, find your weak domains, and turn every mistake into a focused review plan.
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Study by domain
Practice the CARO exam by domain
2. Refrigeration cycle
8% of the examIdentify weak areas and improve with focused review.
Start Practicing3. Properties of refrigerants and refrigerant tables
7% of the examIdentify weak areas and improve with focused review.
Start Practicing4. Types of refrigerant compressors
6% of the examIdentify weak areas and improve with focused review.
Start Practicing5. Operation and maintenance of compressors
14% of the examIdentify weak areas and improve with focused review.
Start Practicing6. Lubrication
10% of the examIdentify weak areas and improve with focused review.
Start Practicing7. Evaporators and cooling units
9% of the examIdentify weak areas and improve with focused review.
Start Practicing8. Condensers and high-pressure receivers
12% of the examIdentify weak areas and improve with focused review.
Start Practicing9. Purging
5% of the examIdentify weak areas and improve with focused review.
Start Practicing10. Safety, hazards, and prevention
20% of the examIdentify weak areas and improve with focused review.
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Frequently asked questions
Straight answers about the CARO exam, the questions, pricing, the free trial, and how this fits your prep.
The CARO exam spans 10 domains - Refrigeration fundamentals (9%), Refrigeration cycle (8%), Properties of refrigerants and refrigerant tables (7%), Types of refrigerant compressors (6%), Operation and maintenance of compressors (14%), Lubrication (10%), Evaporators and cooling units (9%), Condensers and high-pressure receivers (12%), Purging (5%), and Safety, hazards, and prevention (20%). Every practice question maps to one of them, so you train on exactly what's tested.
The Certified Assistant Refrigeration Operator (CARO) exam has 110 questions and is completed in 3 hours. 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 CARO exam blueprint. We never distribute actual exam content, so practicing here keeps you fully compliant with official exam policies.
No. CARO Exam Prep is an independent study resource for Certified Assistant Refrigeration Operator (CARO). 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 10 CARO domains - Refrigeration fundamentals (9%), Refrigeration cycle (8%), Properties of refrigerants and refrigerant tables (7%), Types of refrigerant compressors (6%), Operation and maintenance of compressors (14%), Lubrication (10%), Evaporators and cooling units (9%), Condensers and high-pressure receivers (12%), Purging (5%), and Safety, hazards, and prevention (20%). 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.
Match it to your exam date: Final Review (2 days) for an exam in the next day or two, Fast Track (7 days) for an exam this week, Pass Confidence (6 weeks) for a structured run-up.
For most countries, the price you see is exactly what you pay - tax is already included. Where local law requires it to be added separately, it's shown clearly at checkout before you pay, so there are never any surprise fees.
Access is instant after payment and runs for your plan's full window from that moment. When the window ends, your local progress stays on your device - you can buy another window any time and pick up where you left off.
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.
Chat with us any time - the 24/7 support chat in the corner of every page gives instant answers about plans, access, and billing. Prefer email? The contact link is in the footer. Payments are processed securely by Stripe, and active customers can download an invoice from their profile page.
Make sure you're signed in with the same email you used at checkout - access activates within a minute of payment. If it still doesn't appear, email us from the contact link in the footer and it'll be sorted out.
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Flip, grade yourself, and repeat the tough ones until they stick.
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Trusted by CARO candidates
Real feedback from CARO candidates on Reddit.
"passed last week. wasnt sure the practice questions on caroexam.com would match the real test but the safety section stuff felt almost identical. did maybe 20 mins a night for a month. thats it, no fancy method, just kept grinding the missed ones."
"honestly almost didnt study at all until two weeks before. mistake review feature saved me, kept flagging the same compressor maintenance questions wrong over and over til it finally stuck. passed with room to spare, still kinda shocked."
"took this after a coworker recomended it. the condenser and high pressure receiver questions tripped me up every time in practice but by test day i actually knew the material instead of just guessing. quiet relief walking out, not gonna lie."