1sd-Exam

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

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

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)

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

It is very important before assembly a regulator check the condition of______________

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

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

The regulator enables the diver to breathe underwater. This part the equipment allows _________________.

Suits are protective clothing, which help to minimise thermal exposure effects on the body; this is due to the high thermal conductability of water. How much times higher is the water than air?

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

Nitrogen narcosis effects different divers differently depending on the ___________________

The mask headstrap must

Knifes must be used ________________________.

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

The pressure gauge shows the level of pressure in the ____________

Underwater it is always necessary to ____________ the mask

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

Before a dive it is good to carry out a thorough check with your buddy, helping him/her to prepare and put on the equipment before entering the water.

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

Hypoxia refers to the situation in which the amount of oxygen required by the cell is less than that available to the body

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:

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

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

The BCD is used to_____________________

underwater the objects appear _____________by about 1/3, water also absorbs light, an effect that increases with wather depth.

The tendency of the body to float is:

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

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.

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.

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.

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

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

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 ____________

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

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

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

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

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

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

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

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.

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

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

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

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

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

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

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

It is advisable to ________________ before entering the water.

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