PADI Open Water Diver Manual Answers Chapter 2 - Knowledge Review

​PADI Open Water Diver Manual Answers Chapter 2 explained in detail to help you prepare for the course and understand the PADI Open Water Knowledge Review 2 Answers. 

In PADI Open Water Diver Manual Answers Chapter 2 we focus on more general scuba diving tips for beginners. In chapter 2 we cover refraction, temperature, the buddy system, and more air consumption theory.

After understanding the PADI Open Water Knowledge Review 2 Answers you are another step closer to your scuba diving certification.

Question 1 - PADI Open Water Diver Manual Answers Chapter 2

1. ​I take a colorful fish identification slate with me while diving. Looking at the slate underwater at 12 meters/40 feet, I would expect the slate to look:

Answer: C and D

• less colorful
• larger/closer

Water absorbs color and red is the first color that gets affected by this. This doesn’t mean that you won’t see a beautiful colorful reef on your dives, but it might be a bit less colorful than when you snorkel in shallow water or have seen on documentaries( as they use underwater lights).

Objects also appear larger and closer to you underwater. This has to do with light traveling through different mediums like water and air and vice versa. We call this refraction. For this reason, you might think that a fish is big during the dive, but in reality, it is a bit smaller.

Question 2 - PADI Open Water Diver Manual Answers Chapter 2

2. ​While underwater, I want to move efficiently by:

Answer: B, D, and E

• being streamlined
• swimming slowly and steadily
• maintaining proper trim

It is harder to move through water than through air as water is denser than air. For this reason, we can get overexerted much quicker while scuba diving. To prevent this we want to make sure that we swim in a horizontal position(trim).

​We also want to make sure that we are streamlined by attaching our dive equipment as close as possible to our body and keep our arms locked together or next to our body. We only use our legs to swim, so try not to use your arms when scuba diving.

On top of that, it is important to always swim slowly and steadily while scuba diving to conserve energy and air. The slower you move the more things you can see, and you will love your dives a lot more.

Question 3 - PADI Open Water Knowledge Review 2 Answers

3. ​During a dive, I can’t stop shivering. The proper response would be to:

Answer: A - exit the water immediately, dry off and seek warmth.

In water, we lose heat a lot faster than in air. While on land a temperature of 24 degrees Celsius is pleasant, you will find out that scuba diving in 24 degrees gets cold quickly.

You can prevent getting cold underwater by wearing a wetsuit or drysuit. The thickness depends on the temperature of the water and your tolerance level.

Wear a wetsuit to prevent getting cold

​If you do get cold and start shivering underwater then signal your buddy, slowly ascent, and exit the water immediately to prevent hypothermia.

Question 4 - PADI Open Water Diver Manual Answers Chapter 2

4. ​During a dive, my buddy and I have to swim hard because of an unexpected current. If I were to begin to feel fatigued, have labored breathing, experience a feeling of suffocation or air starvation, and perhaps feel like I may panic, I should

Answer: C - stop all activity, signal my buddy, and rest.

Like we discussed in the PADI Open Water Diver Manual Answers Chapter 1 you can get quickly overexerted in water when you move too much. 

This is because water is much denser than air and we are under pressure. It is very important to take slow deep breaths in and out to prevent a build-up of carbon dioxide.

Just rest and catch your breath if you get overexerted.

​If you did move too much and you feel that you can’t get enough air you should stop all activity, signal your buddy, and rest. The good news is that when you rest you will recover quickly and in most cases, you can continue the dive. Try to avoid sting currents unless you have completed a drift diving course.

Question 5 - PADI Open Water Diver Manual Answers Chapter 2

5. When planning our dive, my two buddies and I agreed that the general procedure for buddy separation would be adequate. If during the dive I find I am with one buddy but can’t see the other, which of the following applies?

Answer: A - This is a buddy separation. Stay with the remaining buddy and search for no more than a minute, then reunite on the surface.

It is important to stay close to your buddy at all times. In the unlikely event you might get separated you can search for your buddy for no more than a minute. If you can’t find your buddy you should slowly surface and reunite.

Question 6 - PADI Open Water Knowledge Review 2 Answers

6. ​The buddy system is ___ responsibility.

Answer: C - my

Buddy separation can occur because of various reasons. The most common reasons are: One buddy swims too fast without checking enough, using underwater cameras, chasing fish, or getting caught in currents.

Stay close to your buddy while scuba diving.

Even if you dive with a buddy that doesn’t pay enough attention, it is still your responsibility to stay close to your buddy and remind them to stay close. Try and get the hang of asking if your buddy is ok every few minutes, check each other's air regularly and keep a close eye on each other at all times.

Question 7 - PADI Open Water Diver Manual Answers Chapter 2

7. ​My buddy and I are planning a shore dive. We’re descending onto a very gradual slope that begins at 5 meters/15 feet, so our descent and ascent will be a gradual part of swimming out and back underwater. We have similar cylinders filled to 200 bar/3000 psi. We plan:

• 50 bar/500 psi reserve.
• 20 bar/300 psi for our safety stop.
• To turn the dive when we’ve used one-third of the air available to use on the dive. 

This means we should head back when either of our SPGs read

Answer: C - 157 bar/2270 psi

• 50 Reserve + 20 for the safety stop = 70 bar
• 200 - 70 = 130 bar / 3 (Rule of thirds) = 43 bar
• 200 - 43 = 157 bar

Question 8 - PADI Open Water Diver Manual Answers Chapter 2

8. ​My fin strap comes loose (later I discover that I didn’t buckle it properly) while swimming at the surface in choppy waves. Which of the following habits would help me as I handle this problem?

Answer: A, B, and C

• Having my mask on and a mouthpiece in my mouth.
• Having enough air in my BCD for adequate buoyancy.
• Staying close to and signaling my buddy.

Keeping your regulator in and mask on your face helps to prevent water from entering your airways in choppy waves. 

​It is important to make sure you are positively buoyant by fully inflating your BCD. This helps you to stay on the surface as it is hard to swim with only one fin. Make sure you signal your buddy for assistance and ask them to help you to swim back to the boat or shore or fix the strap on the surface if it is possible.

Question 9 - PADI Open Water Knowledge Review 2 Answers

9. ​I’m about to begin a descent with my buddy. Which of the following steps should I take before actually beginning my descent?

Answer: B, C, and D

• Orient myself to something at the surface
• Check that my computer is active
• Confirm that my buddy is ready

​Before your descent, you can use the acronym: SORTED to prepare for your 5 Point Decent. Here are the steps for the 5 point descent:

1. S - Signal OK to go down
2. O - Orientate
3. R - Switch snorkel to your regulator
4. T - Check your computer and the time
5. E&D - Equilize and Descent

Question 10 - PADI Open Water Diver Manual Answers Chapter 2

10. ​My buddies and I are wearing wet suits for exposure protection. As I descend, my buoyancy will ____________, so I should _______________ to control my buoyancy.

Answer: E - decrease, add air frequently to my BCD in small amounts.

Your wetsuit is made of neoprene rubber. When you decent we increase the surrounding pressure which makes your wetsuit thinner. This will result in loss of buoyancy and you might start descending too fast. 

You can add small bits of air into your BCD frequently to counter to control your speed and buoyancy.

Question 11 - PADI Open Water Diver Manual Answers Chapter 2

11. ​I should never descend or ascend without a reference that I can follow or make contact with.

Answer: TRUE

During your PADI Open Water Diver course, you will learn how to descend and ascend without a visual reference in case a reference is not available. However, we always recommend you to descend and ascend with a visual reference for orientation.

Descending or ascending with a reference line is much easier

​Even better will be a decent or ascent line that you can hold onto if needed. Holding onto a reference line can help you control your speed, makes it easier to equalize your ears, and is great for when you feel any anxiety as it helps in calming you down.

Question 12 - PADI Open Water Knowledge Review 2 Answers

12. ​As a prudent, conservative diver, the following are normal parts of my ascents:

Answer: A, C, and D

• Ascending at 18 m/60 ft per minute (or slower if specified by my computer)
• Stopping for 3 minutes at approximately 5 meters/15 feet
• Adjusting my buoyancy in small amounts frequently

It is important to always ascent as slow as possible and never faster than 18m/60 ft per minute to prevent decompression sickness. You will learn more about decompression sickness in the PADI Open Water Diver Manual Answers Chapter 4.

5 Point ascent.

​We always want to make a safety stop after every dive at 5 meters for 3 minutes to reduce nitrogen levels.

You should also deflate your BCD on the ascent to prevent air from expanding in your BCD, which can lead to an uncontrolled and fast ascent. Just use your legs and fins to swim up to the surface. This way it is much easier to control your ascent.

Question 13 - PADI Open Water Diver Manual Answers Chapter 2

13. ​While boat diving, my buddy and I finish our safety stop and ascend to the surface. When I reach the surface, I should:

Answer: C - inflate my BCD, switch to my snorkel, and signal “okay” to the divemaster.

A lot of (beginner) divers are very excited when reaching the surface after seeing so many beautiful things underwater. It is common for them to forget to inflate their BCD at the surface which can cause problems as it is hard to stay afloat with their weight system.

It is therefore very important to keep your mask and regulator in when reaching the surface and first fully inflate the BCD. Once the BCD is fully inflated you can switch from your regulator to your snorkel and signal the Divemaster or Instructor on the boat that you are ok.

Learn more about the PADI IDC Course and how you can become a diving instructor.

Question 14 - PADI Open Water Diver Manual Answers Chapter 2

14. ​Match the letter with the characteristics of the exposure suit type.

a. insulation provided by a layer of air and undergarment
b. proper fit is important to keep water trapped against your body
c. little or no insulation

• B - wetsuit
  
• A - drysuit
  
• C - skinsuit

Question 15 - PADI Open Water Knowledge Review 2 Answers

15. ​Which of the following can be a problem before the dive when diving on a warm day in a wet or drysuit?

Answer: C - overheating

Wetsuits and drysuits are fantastic to keep you warm underwater but they can quickly get hot on the surface, especially on a hot day.

Wearing a wetsuit on land can cause overheating.

​We recommend you only wear them just before entering the water and take them off the moment you get back on the boat or land(shore dive) to prevent overheating.

Question 16 - PADI Open Water Diver Manual Answers Chapter 2

16. ​If I have only one cutting tool, the recommendation is that I wear it where __________ hand can reach it:

Answer: D - either

It doesn’t matter where you attach your cutting tool as long as either hand can reach it easily when you need it.

We usually don’t use cutting tools often, but they can be a lifesaver in the unlikely event you get entangled.