1sd-Exam

At a depth of 15 metres, the pressure inside the lungs will be the equivalent of the ambient pressure:

Always have a keeper on _________________ side of the weightbelt from the buckle.

Every time we make a movement we use energy which asks more of our body, requiring a change in the ___________ in order to satisfy this new demand.

A body immersed in a fluid is ______________by the column fluid above it.

In the case of loss of regulator it is necessary to ascent and continue to

Begin the ascent with no less than _____________ in the cylinder.

our body contains cavities filled with gas that subjected with pressure are compensated for in two ways:

If we want to dive, ________________________, the B.C.D. must be deflated by using the exhaust valve.

The BCD must be slowly deflated during ascent, because the air inside it expands and creates an ________________________and subsequent loss of control of speed. (max. 9 meter/minutes)

The air that we breathe is composed of a mixture of gases, for simplicity let’s say that is made up mainly of________________________

The function of the cardio-circolatory system is to transport and distribute oxygen and to remove residues and _____________

During a dive careful attention needs to be paid to controlling the buoyancy, which should be_______________

The pressure gauge shows the level of pressure in the ____________

The pressure of the cylinder must be checked by taking 1 breaths from each regulator whilst watching the contents gauge.

Knifes must be used ________________________.

Descending underwater the increase in pressure is constant at ______ Atmosphere every 10 metres.

All the divers should have at least a basic understanding of first aid and O2 administration.

The test of cylinder consists of checking inside and outside for corrosion and pressure resistance test using pressure of ________ higher than in normal use

The function of the respiratory organs is to supply the body with the gasses surrounding it; this is done by its absorption into the blood through the ____________

You finished your first dive with dive letter group F of nitrogen. Now, wanting to plan a second dive, after a break on the surface of 3 hours and 29 minutes, moving to the right to find the box corresponding to this time, we find the interval from 2 hours 29 minutes to 3 hours 57 minutes. Below the new dive letter group is indicated: in this case C.

A personal dive computer can calculate the exact saturation state of our tissue

“At a constant temperature the volume of a gas varies _____________ with absolute pressure while the density of a gas varies ________ with absolute pressure”

The ascent starts finning towards the surface, in order to control the speed; the B.C.D. must be ________________.

When you plan a dive the first thing is to establish the maximum depth to be reached, for examples 13 metres, naturally considering 15 metres on the tables following down the column the limit of permanence at this depth is shown at 100 minutes. Planning to dive for 35 minutes, 30 minutes must be calculated. At this point on the right the corresponding dive letter group, in this case F is found.

A floating buoy marks the presence of divers underwater. In some countries dive law requires ______________ flag known as an “A FLAG”

The only effective treatment for air embolism syndrome is immediate recompression in a hyperbaric chamber and the administration of large quantity of __________ to make the blood more fluid and so reduce the risks of obstruction by the bubbles.

The speed at which sound travels through water makes it difficult for his senses to judge _______________

The rules for the prevention of decompression sickness can be divided as follows:

Nitrogen narcosis effects different divers differently depending on the ___________________

The water pressure on the eardrum must be balanced by internal pressure so that it is not damaged. It is necessary to compensate ______________________, without waiting to feel the pain

It is advisable to ________________ before entering the water.

Descending and ascending through the bubbles discharged by another diver below, can cause dizziness, try not to look at the bubbles.

If you ascend too quickly the nitrogen is cannot be released quickly enough thus contributing to the formation of bubbles in the divers __________

The “Octopus” It is fixed to _____________________ of the first stage through a hose than the normal one.

On resurfacing it may be necessary to ______________________ to obtain positive buoyancy or to be able to come out of the water more easily

Every time that our body undergoes a loss of heat it responds by trying to maintain a constant temperature in the central zone. This is:

The tendency of the body to float is:

All weight belts must have a quick release buckle, which requires a positive action to open them

On dive tables the time and depth of the dive are correlated.

Normally, ____________ breath is preceded by an increase in the breathing rate.

The most serious consequence of pulmonary overdistension is the passing of ________ bubbles from the alveoli into the blood stream and is commonly known as air embolism syndrome.

A divelog well kept is a document that shows the divers experience but is of much less value than a certificate.

During this course all dives will be performed within the limits of non-decompression

Underwater it is always necessary to ____________ the mask

While you dive, in order to evaluate the hydrostatic equilibrium, is important to consider the relation between volume and weight of:

By wearing a mask, an air space is placed between the diver’s eyes and the water so the objects can be_______________________

Several techniques exist for entering into the water these have always been developed with the safety of the ___________ as a primary consideration.

Underwater sounds are transmitted ______________ because water has a greater density than air.

After commencing final descent check your buddies kit for any air leaks.

First aid for Decompression Sickness: the application of pure oxygen guarantees greater oxygenation of __________ and helps to lessen the risk of damage