PADI IDC Theory Exam Questions 2025
Test Yourself here
PADI IDC Theory Exam Questions and answers 2025
- How deep is your dive knowledge? Confident you wouldn’t sink in a scuba exam?
- Think you could make a splash in a scuba exam, or would you just be a fish out of water?
- Are you a scuba gear guru or just tangled in hoses? Think you could pass an equipment exam?
Let’s find out!!
PADI Exam questions
Which PADI Exam Questions would you like?
DIVE PHYSICS
BUY FULL SETS OF PADI IDC MOCK EXAMS
Buy full sets of PADI IDC Mock Exams here.
What are the 6 TOP MISTAKES that people make
when studying for PADI IDC Exams?
Click here to find out, plus an amazing offer!
IDC Theory Exam PHYSICS questions
Let’s start with Physics – Here are a few PADI Exam Questions
If the air in your cylinder was accidently mixed with 0.6% carbon monoxide, what would the surface equivalent percentage be if you took this to 20 metres/66 feet?
1.8%
Objects normally appear ______ due to _____ when viewed underwater.
Closer / Refraction
If you make a dive in cold water wearing a thin wet suit, most of your heat loss will occur through ____
Conduction
If you’re diving at 30 metres / 100 feet and want to cut your gas consumption in half, you need to ascend to a shallower depth of ______
10 metres / 30 feet
More PADI Dive Physics exam questions
Click on this link: PADI Physics for
- More Questions
- Explanations
- Videos
You’ll find valuable information and questions about:
IDC Theory Exam Physiology questions
Carbon monoxide is difficult to detect because it is _____
Tasteless and Odourless
An increase in the partial pressure of nitrogen could result in _____
Gas narcosis
Which of the following is a sign of heat exhaustion?
cool clammy skin
A ruptured ear drum may immediately cause ______ underwater and may also lead to infection due to water entering the _____
Vertigo / Middle ear
More PADI Dive Physiology exam questions
Click on the link: PADI Physiology
- More Questions
- Explanations
- Videos
You’ll find valuable information and questions about:
What people say about the online courses
- “you are such a good teacher. Your videos are so patient and explaining everything so much better than any paper could ever do”
- “You won’t regret it at all, Prior Knowledge helps take a lot of the dark confusion away and makes the complicated, simple and enjoyable. Enjoy it and good luck.”
- “I am doing my IDC in bonaire starting tomorrow and I wanted to say thank you because I have studied well but your videos made it clearer and I feel ready!”
- “I would like to say thank you so much for sharing your knowledge in a simple and easy way. it helped me alot on my study”
- “Thanks for this Steve! Best and most clear demo for ERDPML I’ve ever seen. Before I watched this video I think I’d probably have avoided it forever!”
- “Thank you! Not in PADI, but cmas. This video helped me understand a lot more, you describe everything in a slow and comprehensive way
“
Test yourself with COMPLETE sets of 2025 Mock PADI IDC Exam questions.
BUY FULL SETS OF PADI IDC MOCK EXAMS
PADI IDC Theory and Standards Mock Exam papers
All PADI exam answer keys included 2025 Instructor Manual page numbers given for Standards Answers.
- All PADI exam answer keys included
- 2025 Instructor Manual page numbers given for Standards Answers
BUY 5 sets here
IDC Theory Exam Equipment questions
If you’re using a lifting bag to raise an object, the best position for you to be is in is____
to the side of and level with the lift bag
Yesterday, you used an aluminium cylinder for your dive. Today you will dive in the same location, but with a steel cylinder.
Both cylinders have the same capacity.
What adjustment to your equipment should you make?
Extremely cold water
During a dive on which one buddy is using RDP tables and the other is using a computer, both divers should_____
dive within the limits of the most conservative tool
With regards to weight systems, it’s best to______
Wear sufficient weight so that you are neutrally buoyant at the surface
More PADI Dive Equipment questions
Click on the link: PADI Equipment
- More Questions
- Explanations
- Videos
You’ll find valuable information and questions about:
IDC Exam Diving Skills and the Environment questions
The weather forecast for tomorrow is windy.
You consider changing your planned dive site, becuase you’re concerned about______
waves
While exiting the water, it’s a good idea to keep your _____ as you climb the boat’s ladder
Mask on and regulator in your mouth
While diving at night, you accidentally bang your hand on the reef wall and drop your dive light. It’s still working, so you can see it on the bottom.
You should first_____
Get your back up light out and check that your hand is OK
You should not try lifting an object by hand underwater that weighs more than_____
7 kilograms / 15 pounds
More PADI Diving skills and Environment exam questions
Click on the link: PADI Diving skills and Environment
- More Questions
- Explanations
You’ll find valuable information and questions about:
IDC Theory Exam: PADI RDP and eRDPml questions
The Recreational Dive Planner surface interval credit table is based on a ____ minute half time tissue compartment
60 minute
If you are planning a dive in a lake that is at 250 metres / 820 feet of altitude. How would you plan it according to the RDP?
Much the same as you would at sea level.
What is the no decompression limit for a dive to 11 metres / 36 feet?
Metric: 147 minutes
Imperial: 140 minutes
If a diver exits the water in pressure group P, what would the new pressure group be after a surface interval of 100 minutes?
B
More PADI RDP and eRDPml exam questions
Click on the link: PADI RDP and eRDPml
- More Questions
- Explanations
- Videos
You’ll find valuable information and questions about:
PADI Standards
All based on PADI Instructor Manual 2025
The minimum age for a PADI Junior Scuba Diver certification is:
10 – Key Standards Page 31
True or False. PADI Divemasters in Active status may independently conduct PADI Discover Scuba Diving
programs in a pool or in confined open water. If qualified as a Discover Scuba Diving Leader.
True. Professional Membership – Divemaster Duties Page 174 No.12
True or False. PADI Assistant Instructors are authorized to teach and certify Peak Performance Buoyancy
Specialty Divers under the direction of a PADI Instructor. The PADI Instructor must co-sign the student diver
log books and Training Record form after verifying that all performance requirements are met.
True. Professional Membership – Assistant Instructor Duties Page 177 #4 and Page 29
True or False. PADI Seal Team dives can only be conducted in a swimming pool.
True. Seal Team – General Confined Water Considerations Page 146
More free PADI Standard exam questions
Click on the link: More PADI Standards exam questions
PADI Exam Questions and Answers
You’ll want to make sure that you’re fully prepared for any PADI Exam question that you’re asked.
One of the best ways to prepare is to practice taking exams, and then checking your answers.
PADI Test Questions
Below, you’ll find some very realistic current PADI test questions.
All based on the latest PADI materials and ideal for getting prepared for your PADI IDC and Instructor exams.
Test yourself with COMPLETE sets of 2025 Mock PADI IDC Exam questions.
PADI IDC Exam Questions - Mock Exams
You can buy realistic 2025 PADI Mock Exam papers.
They’re all written with the same format and the same content as you’ll find on your final PADI Instructor Exams.
PADI Instructor Mock Exam questions
Each individual exam (A, B, C, D or E) is a replica of what you’ll find on your final PADI Instructor Exam.
Each has:
- 5 Theory Exams each with 12 questions
- 1 Standards Exam with 50 questions
And of course all of the answers.
Buy each exam separately for US$15 each (or the equivalent in your currency)
Click HERE to buy ALL FIVE mock exam papers for US$54 (or equivalent in your currency)
Click on the exam image to find payment details.
What do the mock exams consist of?
Each individual exam (A, B, C, D or E) is a close replica of what you’ll find on your final PADI Instructor Exam.
The same content, the same format and the same subject matter.
Each has
- 5 theory exams with 12 questions
- 1 standards exam with 50 questions
Of course, these are NOT the same questions that PADI ask. That is not the idea of these mock exams.
The purpose is that you’re as up to date as possible with the topics found on current PADI Instructor Exam questions.
Diving Theory Test
Lots of practice with Diving Theory Test papers really helps boost your confidence.
The more that you practice, the more comfortable you get with:
- Wording of the questions
- Subjects that come up time and again
- Topics that are in the current PADI IDC Exams
- The “quick” ways to work out physics calculations
- Immediately being familiar with questions
IDC Exam
When it comes to taking your PADI IDC Exam, you’ll be ready, confident, and enthusiastic.
“Bring it ON!”
PADI IDC Course Study Guide
All of the above questions and videos were taken from the
FULL IDC PREPARATION COURSE
Full explanations, videos, test questions and all mock exams are included in the course.
Also how to teach in confined water and in the classroom.
All re-written for 2025.
What people say about the online courses
PADI Divemaster Exam Questions
All of these questions are similar to those found on the PADI Divemaster Exams.
To be honest, there isn’t much difference between the level of knowledge needed to become a PADI Instructor or a PADI Divemaster.
So, you’ll find that PADI Divemaster Exam questions are very similar to those found on the PADI IDC.
PADI test questions
All of the help found on these pages will help you regardless of whether you’re studying for your PADI Divemaster Exams or for your final PADI Instructor Exam.
The Full IDC Preparation Course will help tremendously in your duties of a DM, even if you don’t want to progress to Instructor level right now.
Scuba diving theory test
PADI IDC Theory Revison help
Are you looking for help with PADI IDC dive theory revision?
The FULL IDC preparation course is the ideal program to help you with the 2024 PADI Instructor Development Course.
Packed with lots of videos, quizzes and mock exams.
Also includes tips on how to teach in confined water and in the classroom.
You can sign up here for the PADI IDC preparation course
Where do you find the latest questions from PADI IDC and PADI IE exam?
It’s obvious that the more practice that you get with PADI IDC theory exam questions, the more confidence you’ll get.
It’s also important you practice with the most recent updated questions.
The PADI IDC Theory Preparation Course is regularly updated to reflect changes in the most current PADI IDC Exams.
Make sure that you’re fully prepared for your PADI Instructor Development Course
What changes to PADI Make to the IDC and Instructor Exam Questions?
- Change the wording
- Introduce new topics
- Leave out old topics
- Change the emphasis
Make sure that you’re using 2025 style questions and advice for your PADI theory test.