Frequently Asked Questions
Find answers to common questions about CDL tests, our app, and CDL schools
Frequently Asked Questions
Theoretical Tests (CDL Permit)
In which states can I take exams in Russian?
Russian language exams are available in states like California, Ohio, Pennsylvania, Washington, Oregon, New York, New Jersey, and Florida. The availability of languages depends on the specific DMV location.
How many questions are on the exam?
General Knowledge: 50 questions Air Brakes: 25 questions Combination Vehicles: 20 questions
How many mistakes can I make?
General Knowledge: Up to 10 errors allowed Air Brakes: Up to 5 errors allowed Combination Vehicles: Up to 4 errors allowed You need to answer 80% of questions correctly to pass.
How many times can I retake the theoretical exam?
Most states do not have strict limits on retakes. Some states have waiting periods (for example, Illinois requires a 30-day wait after 3 failed attempts). Check with your local DMV for specific rules.
Can I take theoretical exams outside my license state?
No, the driver's permit exams can only be taken in the state where you have permanent registration.
Can I take the exam without knowing English?
It depends on the state. Many states offer the written knowledge (theory) test in languages other than English — Spanish is the most common, and some states offer additional languages — but this varies by state, and several states have recently moved to English-only testing. The skills (driving) test is always conducted in English. Just as important: federal rules now require English-language proficiency to operate a commercial vehicle, and since June 2025 drivers can be placed out of service for failing a roadside English check. So you may be able to study and test in your language where it's offered, but you'll need working English to earn and keep your CDL — that's why CDL Help lets you practice in your language while building the English you need.
CDL Help App
Is the app paid? How to get access to all tests?
The basic version is free with limited features. Full access to all tests and features requires a paid subscription. Subscriptions are available for different time periods.
How many questions are in the app? What's the difference between Express and Full?
Express version: Over 350 questions covering basic CDL topics Full version: Over 800 questions including all endorsements and comprehensive coverage The Full version includes more detailed explanations and additional practice tests.
Did you really add all possible questions?
We cover many potential exam questions based on official DMV manuals. While we cannot predict every exact exam question, our team regularly updates the question database based on user feedback and DMV changes.
No sound in the app?
If audio isn't working: 1. Check your device's text-to-speech settings 2. Ensure your device sound is not on silent mode 3. Check the app's audio settings 4. Contact support if issues persist
Payment and subscription issues?
If you're having payment issues, verify your payment information and check your App Store/Play Store region settings. If access is not granted after payment, contact our support team with your receipt.
How do I cancel my subscription?
Because your subscription is billed through the App Store or Google Play (not directly through CDL Help), cancellation is done through your device’s account settings – not inside our app. For iOS / iPhone / iPad: 1) Open the Settings app 2) Tap your name at the top 3) Tap Subscriptions 4) Find CDL Help and tap it 5) Tap Cancel Subscription and confirm For full instructions, see Apple’s cancellation guide: https://support.apple.com/en-us/118428 For Android / Google Play: 1) Open the Google Play Store 2) Tap your profile icon (top right) 3) Tap Payments & subscriptions → Subscriptions 4) Find CDL Help and tap it 5) Tap Cancel subscription and follow the prompts For full instructions, see Google Play’s cancellation guide: https://support.google.com/googleplay/answer/7018481/?hl=en What happens after you cancel: • Your premium access stays active until the end of your current billing period — you are not cut off immediately. • After the billing period ends, the app automatically returns to the free tier (first test section only). • Your progress, bookmarks, and quiz history are not deleted — all data is stored locally on your device and will be there if you resubscribe.
CDL School
How much does CDL school cost?
Average cost ranges from $2,500 to $5,000. Schools with Russian-speaking instructors may charge different rates. Costs vary by location, duration, and services included.
Can I attend school outside my permit state?
Yes, you're generally allowed to train in another state. However, you must take your CDL tests in the state where you hold your permit.
How long does CDL training take?
Typical CDL training programs range from 3-8 weeks for full-time students. Part-time programs may take 10-12 weeks. The duration depends on the school and whether you're pursuing Class A or Class B license.