Knowledge check and Exercise Questions Flashcards
As I descend I need to equalize air spaces. Which of the following are accepted ways of equalizing my ears?
a, block my nose and attempt to gently blow through it.
b. Swallow and wiggle the jaw from side to side.
c. Block my nose and blow forcefully for an extended period.
As I descend I need to equalize air spaces. Which of the following are accepted ways of equalizing my ears?
a, block my nose and attempt to gently blow through it.
b. Swallow and wiggle the jaw from side to side.
During a descent, I try to equalize but discover I’m having trouble doing so. Which of the following is correct?
a. Slow my descent, signal my buddy to slow down, and equalize more forcefully.
b. Stop my descent, signal my buddy, ascend slightly and try again.
c. Continue my descent while equalizing repeatedly.
d. Signal my buddy, ascend to the surface and start my descent over.
During a descent, I try to equalize but discover I’m having trouble doing so. Which of the following is correct?
b. Stop my descent, signal my buddy, ascend slightly and try again.
I should equalize
a. Early and often
b. When I begin to feel discomfort
c. Only if I experience pain
I should equalize
a. Early and often
I should not dive with a cold, nor use medications to dive with a cold. T/F?
I should not dive with a cold, nor use medications to dive with a cold. T/F?
True
The most important rule in scuba diving is:
a. Breathe continuously and never hold your breath.
b. Always dive with a buddy
c. Keep my mask on while in the water, even at the surface
d. Check my SPG at least every couple of minutes.
The most important rule in scuba diving is:
a. Breathe continuously and never hold your breath.
Failure to follow the most important rule in scuba diving can cause serious lung overexpansion(lung rupture) injuries, which in turn can cause paralysis and death. T/F?
Failure to follow the most important rule in scuba diving can cause serious lung overexpansion(lung rupture) injuries, which in turn can cause paralysis and death. T/F?
True
If I feel discomfort in a body air space while ascending, the correct action is to:
a. Continue my ascent while blowing against blocked nostrils.
b. Stop, descend slightly and give trapped air time to work its way out.
c. Descend at least 10m/33ft, then resume my ascent.
If I feel discomfort in a body air space while ascending, the correct action is to:
b. Stop, descend slightly and give trapped air time to work its way out.
My buddy and I are planning a dive to 18m/60ft. We would expect our air supply to last___ at 10m/33ft, all else being the same.
a. Longer than
b. Shorter than
c. The same as
My buddy and I are planning a dive to 18m/60ft. We would expect our air supply to last___ at 10m/33ft, all else being the same.
b. Shorter than
During a dive, I swim hard to keep up with a fish that interests me, but shortly begin to feel like I can’t get enough air. The correct action would be to:
a. Signal my buddy and head up to the surface.
b. Use the regulator purge button to boost airflow.
c. Stop all activity and rest to restore proper deep, slow breathing.
During a dive, I swim hard to keep up with a fish that interests me, but shortly begin to feel like I can’t get enough air. The correct action would be to:
c. Stop all activity and rest to restore proper deep, slow breathing.
An object that is neutrally buoyant in fresh water will ___ in salt water.
a. Sink
b. Float
c. Be neutral
An object that is neutrally buoyant in fresh water will ___ in salt water.
b. Float
The three overall benefits of the buddy system are practicality, safety, and fun. T/F
The three overall benefits of the buddy system are practicality, safety, and fun. T/F
True
The primary considerations when choosing any piece of scuba Gear are:
a. Suitability
b. Brand
c. Fit
d. Comfort
The primary considerations when choosing any piece of scuba Gear are:
a. Suitability
c. Fit
d. Comfort
I’m planning to dive the following week and am checking my gear. I put my kit together and notice that my regulator seems to breathe harder than I remember. The appropriate action would be to:
a. Have it inspected and serviced as needed by a professional before using it.
b. Go ahead and use it, but limit my dive depth
c. Wash it in freshwater and see if the problem persists
I’m planning to dive the following week and am checking my gear. I put my kit together and notice that my regulator seems to breathe harder than I remember. The appropriate action would be to:
a. Have it inspected and serviced as needed by a professional before using it.
There is no way to use a DIN regulator on a yoke cylinder valve. T/F?
There is no way to use a DIN regulator on a yoke cylinder valve. T/F?
False. There is an adapter version of the DIN regulator useable on either type valve
There is no way to use a DIN regulator on a yoke cylinder valve. T/F?
There is no way to use a DIN regulator on a yoke cylinder valve. T/F?
False. There is an adapter version of the DIN regulator useable on either type valve
It is important to master buoyancy control because it allows me to control whether I descend, float, or am neutrally buoyant. I adjust my buoyancy frequently while diving. T/F?
It is important to master buoyancy control because it allows me to control whether I descend, float, or am neutrally buoyant. I adjust my buoyancy frequently while diving. T/F?
True
As you descend in water the pressure:
a. Increases
b. Decreases
c. Does not change
As you descend in water the pressure:
a. Increases
A depth change of 10 meters/33 feet causes a pressure change of what?
a. 1 bar/ata
b. 2
c. 3
d. 4
A depth change of 10 meters/33 feet causes a pressure change of what?
a. 1 bar/ata
If you take 6 litres of air from the surface to 20 m/66 ft, the volume will be ___ liters
a. 1
b. 2
c. 3
d. 4
If you take 6 litres of air from the surface to 20 m/66 ft, the volume will be ___ liters
b. 2
The density of air in the previous question would be ___ the density at the surface.
a. ⅓
b. ½
c. 3 times
d. 4 times
The density of air in the previous question would be ___ the density at the surface.
c. 3 times
A balloon fully inflated and sealed at 10m/33ft would probably ___ during ascent to the surface.
a. Shrink
b. Burst
A balloon fully inflated and sealed at 10m/33ft would probably ___ during ascent to the surface.
b. Burst
As I descend, increasing pressure affects my (choose all that apply):
a. Mask
b. Ears.
c. Sinuses
d. skin
As I descend, increasing pressure affects my (choose all that apply):
a. Mask
b. Ears.
c. Sinuses
A squeeze is caused by
A. Wearing my wet suit or other gear too tightly.
B. A pressure imbalance between the surrounding pressure and an ir space.
A squeeze is caused by
B. A pressure imbalance between the surrounding pressure and an ir space.
Equalization is the process of
a. Adding air to an air space
b. Removing air from an air space
c. Reducing the surrounding pressure
d. Increasing the surrounding pressure
Equalization is the process of
a. Adding air to an air space
I should equalize
a. When I feel pain or pressure.
b. Only if I can’t tolerate the pain or discomfort.
c. Before I feel pain or discomfort.
d. When I reach the bottom.
I should equalize
c. Before I feel pain or discomfort.
I’m descending and discover I can’t equalize. The first thing I would do is
a. Equalize more forcefully.
b. Stop my descent and signal my buddy/the instructor.
c. Slow my descent and see if the problem corrects itself.
I’m descending and discover I can’t equalize. The first thing I would do is
b. Stop my descent and signal my buddy/the instructor.
I equalize gently because an extended, forceful equalization can cause permanent damage to my ears and hearing. T/F
I equalize gently because an extended, forceful equalization can cause permanent damage to my ears and hearing. T/F
True
On a day I plan to go diving, I wake up with my sinuses blocked due to a cold or allergy. I should
a. Take an approved decongestant so I will be able to equalize.
b. Plan to take a lot longer as I descend.
c. Cancel the dive until I’m well.
On a day I plan to go diving, I wake up with my sinuses blocked due to a cold or allergy. I should
c. Cancel the dive until I’m well.
When scuba diving, normal breathing keeps your lungs equalized to the surrounding pressure. T/F?
When scuba diving, normal breathing keeps your lungs equalized to the surrounding pressure. T/F?
True
The most important rule in scuba diving is to
a. Always dive with a buddy.
b. Breathe continuously and never hold your breath.
c. Check your air supply every five minutes.
The most important rule in scuba diving is to
b. Breathe continuously and never hold your breath.
Failure to follow the most important rule in scuba diving can cause severe lung overexpansion injuries, which in turn can cause paralysis and death.T/F?
Failure to follow the most important rule in scuba diving can cause severe lung overexpansion injuries, which in turn can cause paralysis and death.T/F?
True
During ascent I feel discomfort in my ears. I should
a. Continue my ascent at a slightly faster rate.
b. Stop, descend slightly and allow trapped air to work its way out.
c. Use a decongestant before my next dive.
d. Equalize by blowing gently against blocked nostrils.
During ascent I feel discomfort in my ears. I should
b. Stop, descend slightly and allow trapped air to work its way out.
My buddy and I descend to 12 meters/40ft. I would expect to use my air____ at 6m/20ft.
a. Slower than
b. At the same rate
c. Faster than
My buddy and I descend to 12 meters/40ft. I would expect to use my air____ at 6m/20ft.
c. Faster than
The most efficient way to breathe dense air underwater is to breathe
a. Shallowly and slowly.
b. Shallowly and rapidly
c. Deeply and slowly
d. Deeply and rapidly
The most efficient way to breathe dense air underwater is to breathe
c. Deeply and slowly
My body responds to anxiety with increase breathing but slow breathing helps reduce anxiety. T/F?
My body responds to anxiety with increase breathing but slow breathing helps reduce anxiety. T/F?
True
Which of the following are among the breathing rules I follow as a diver?(Choose all that apply)
a. Breathe continuously and never, ever, hold my breath.
b. Breathe slowly and deeply
c. Do not allow myself to get winded or out-of-breath
d. If face with a problem, stop, then maintain or restore slow, deep breathing.
Which of the following are among the breathing rules I follow as a diver?(Choose all that apply)
a. Breathe continuously and never, ever, hold my breath.
b. Breathe slowly and deeply
c. Do not allow myself to get winded or out-of-breath
d. If face with a problem, stop, then maintain or restore slow, deep breathing.
Buoyancy is a force that pushes an object in water upward. T/F?
Buoyancy is a force that pushes an object in water upward. T/F?
True
My sunglasses case falls out of my pocket into the water , but fortunately, it floats so I retrieve it. I would say that m sunglasses case is ___ buoyant.
a. Positively
b. Negatively
c. neutrally
My sunglasses case falls out of my pocket into the water , but fortunately, it floats so I retrieve it. I would say that m sunglasses case is ___ buoyant.
a. Positively
Salt water causes more buoyancy than fresh water because it is less dense and weighs less. T/F?
Salt water causes more buoyancy than fresh water because it is less dense and weighs less. T/F?
False. Salt water causes more buoyancy because it is more dense and weighs more; buoyancy results from the weight of the water displaced.
To control my buoyancy, normally I will use my weight system and my
a. Fins
b. Scuba cylinder
c. Wet suit
d. BCD
To control my buoyancy, normally I will use my weight system and my
d. BCD
When I descend, my buoyancy tends to ____. When I ascend, it tends to ___.
a. Increase, increase
b. Increase decrease
c. Decrease, increase
d. Decrease, decrease
When I descend, my buoyancy tends to ____. When I ascend, it tends to ___.
c. Decrease, increase
Underwater, when I inhale, my buoyancy
a. decreases slightly
b. increases slightly
c. Doesn’t change
Underwater, when I inhale, my buoyancy
b. increases slightly
It is important to master buoyancy control because it affects almost everything I do in and underwater. T/F?
It is important to master buoyancy control because it affects almost everything I do in and underwater. T/F?
True
In recreational diving, the buddy system means diving with another diver or divers in a team that provides assistance and safety benefits. T/F?
In recreational diving, the buddy system means diving with another diver or divers in a team that provides assistance and safety benefits. T/F?
True
Overall benefits of the buddy system include(choose all that apply):
a. Practicality
b. Safety
c. fun
Overall benefits of the buddy system include(choose all that apply):
a. Practicality
b. Safety
c. fun
The three most important considerations in choosing scuba equipment are suitability, fit and ___
a. Cost and features
b. Color and style
c. Manufacturer
d. comfort
The three most important considerations in choosing scuba equipment are suitability, fit and ___
d. comfort
Getting the service my gear needs may be a consideration when choosing equipment. T/F?
Getting the service my gear needs may be a consideration when choosing equipment. T/F?
True
Before each use, I should ____ my equipment.
a. Inspect
b. Wash
c. Warm
d. dry
Before each use, I should ____ my equipment.
a. Inspect
I need a mask because
a. I will inhale without it.
b. my eyes must be in air to focus.
I need a mask because
b. my eyes must be in air to focus.
My mask enclose my nose so I can
a. equalize the mask
b. suck the mask into place
My mask enclose my nose so I can
a. equalize the mask
From among masks that fit me, I should choose a mask that fits as far away from my face as possible. T/F?
From among masks that fit me, I should choose a mask that fits as far away from my face as possible. T/F?
False. Choose a low profile that sits as close to your face as possible.
I want to adjust my mask so the strap rests
a. Below my ears, above the neck
b. over my ears, below the crown of my head
c. above my ears, over the crown of my head
I want to adjust my mask so the strap rests
c. above my ears, over the crown of my head
Snorkels are a standard equipment for scuba diving because they allow me to breathe with my face in the water, or in rough conditions, without wasting my scuba air, especially when I have little scuba air remaining. T/F?
Snorkels are a standard equipment for scuba diving because they allow me to breathe with my face in the water, or in rough conditions, without wasting my scuba air, especially when I have little scuba air remaining. T/F?
True
Some scuba divers prefer a snorkel with a flexible lower portion so it drops out of the way when not in use. T/F?
Some scuba divers prefer a snorkel with a flexible lower portion so it drops out of the way when not in use. T/F?
True
When my snorkel is in my mouth, the tip should be
a. above my forehead
b. over the crown of my head
c. at the base of my skull
When my snorkel is in my mouth, the tip should be
b. over the crown of my head
Fins provide a large surface area so my legs can push against the water effectively. T/F?
Fins provide a large surface area so my legs can push against the water effectively. T/F?
True
The two basic fin styles are ____ fins.
a. large blade and small blade
b. freshwater and marine
c. vented and split
d. adjustable and full-footed
The two basic fin styles are ____ fins.
d. adjustable and full-footed
My primary considerations when choose fins are fit and
a. blade size
b. Material
c. Splits
d. vents
My primary considerations when choose fins are fit and
a. blade size
To prepare adjustable fins, I should adjust the straps wearing my wetsuit boots. T/F?
To prepare adjustable fins, I should adjust the straps wearing my wetsuit boots. T/F?
True
There’s no real benefit to choosing the components of my scuba kit as an integrated package. T/F?
There’s no real benefit to choosing the components of my scuba kit as an integrated package. T/F?
False. Although the components are generally interchangeable, choosing your scuba kit as a package helps you best meet your preferences.
The LPI mechanism inflates the BCD with air from my scuba cylinder. T/F?
The LPI mechanism inflates the BCD with air from my scuba cylinder. T/F?
True
My BCD should have adequate capacity to easily float my equipment and me at the surface. T/F?
My BCD should have adequate capacity to easily float my equipment and me at the surface. T/F?
True
My BCD should fit
a. very tightly and restrict breathing when fully inflated
b. fit snugly but not restrict breathing when fully inflated
My BCD should fit
b. fit snugly but not restrict breathing when fully inflated
My buddy is rinsing a BCD and partially fills the bladder with water. Is this consistent with recommended BCD care? Y/N?
My buddy is rinsing a BCD and partially fills the bladder with water. Is this consistent with recommended BCD care? Y/N?
Yes
The most important consideration when choosing a regulator is
a. Ease of breathing
b. Color
c. dive/predive switch
d. Adjustable second stage
The most important consideration when choosing a regulator is
a. Ease of breathing
When choosing an alternate air source, a primary consideration involves deciding
a. Whether to let it dangle
b. Where to secure
c. Between independence and simplicity
d. Whether you really need one
When choosing an alternate air source, a primary consideration involves deciding
c. Between independence and simplicity
My SPG is always part of my dive. T/F?
My SPG is always part of my dive. T/F?
False. Your SPG may be an independent instrument or it may be integrated into your dive computer.
My local dive pro will usually set up my regulator components. T/F?
My local dive pro will usually set up my regulator components. T/F?
True
When setting up and wearing my kit, the alternate air source
a. Dangles on either side
b. Secures in the triangle formed by my hips and chin
c. Goes in a pocket on my left
d. Goes in a pocket on my right
When setting up and wearing my kit, the alternate air source
b. Secures in the triangle formed by my hips and chin
Regulators need periopdic overhauls, typically every year or two years. T/F?
Regulators need periopdic overhauls, typically every year or two years. T/F?
True
The ____ is a safety device that relieves accidental overpressure by releasing air before reaching the pressure at which the cylinder would fail.
a. DIN valve
b. Burst disk
c. Cylinder alloy
The ____ is a safety device that relieves accidental overpressure by releasing air before reaching the pressure at which the cylinder would fail.
b. Burst disk
A cylinder with a higher working pressure always holds more air than a cylinder with a lower working pressure. T/F?
A cylinder with a higher working pressure always holds more air than a cylinder with a lower working pressure. T/F?
False. A cylinder’s capacity depends upon both its working pressure and its internal capacity.
I’m renting a scuba cylinder at a dive resort. Among the cylinders for hire, some have green and yellow bands that read “Nitrox.” As a PADI Open Water Diver with no other training or instructor supervision, am I qualified to use one of these cylinders?
a. Yes
b. No
I’m renting a scuba cylinder at a dive resort. Among the cylinders for hire, some have green and yellow bands that read “Nitrox.” As a PADI Open Water Diver with no other training or instructor supervision, am I qualified to use one of these cylinders?
b. No
I bring a cylinder aboard a dive boat in preparation for a trip out to a nearby reef. The normal procedure would be
a. Stand the cylinder on the deck
b. Lay the cylinder on the deck
c. Secure the cylinder in a rack
I bring a cylinder aboard a dive boat in preparation for a trip out to a nearby reef. The normal procedure would be
c. Secure the cylinder in a rack
Scuba cylinders require pressure testing ___ and visual inspection ___.
a. Annually, annually
b. Annually, every 2-5 years
c. Every 2-5 years, annually
d. Every 2-5 years, every 2-5 years
Scuba cylinders require pressure testing ___ and visual inspection ___.
c. Every 2-5 years, annually
I should have my scuba cylinder filled
a. From any compressed air source
b. With pure oxygen
c. With pure nitrogen
d. Only by reputable scuba air stations
I should have my scuba cylinder filled
d. Only by reputable scuba air stations
The most important feature in my weight system is its
a. Comfort
b. Quick release
c. Size
d. trim
The most important feature in my weight system is its
b. Quick release
I must be able to quickly release enough weight to float reliably in an emergency, but not necessarily all my weight. T/F?
I must be able to quickly release enough weight to float reliably in an emergency, but not necessarily all my weight. T/F?
True
Trim means having the right ___ of weight.
a. Distribution
b. Amount
c. shape
Trim means having the right ___ of weight.
a. Distribution
One reason for wearing more than one weight system is that is sometimes easier than handling a single, heavier one. T/F?
One reason for wearing more than one weight system is that is sometimes easier than handling a single, heavier one. T/F?
True
Accessory weights
a. Must have quick releases
b. Can help you adjust your trim
c. Require special training
Accessory weights
b. Can help you adjust your trim
BCD stands for ___
BCD stands for ___
Buoyancy Control Device
The regulator performs what function?
The regulator performs what function?
Delivers breathing air at the surrounding pressure when you inhale and directs exhaled air into the water.
The cylinder performs what function?
The cylinder performs what function?
Holds the high-pressure breathing air supplied by your regulator during the dive.
The weight system performs what function?
The weight system performs what function?
Holds lead weight to counteract the positive buoyancy of your body and some of your equipment, with a mechanism for dropping some or all the weight in an emergency.
