1sd-Exam

Underwater it is always necessary to ____________ the mask

The mask headstrap must

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

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

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

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

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?

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

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 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.

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)

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

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

Nitrogen narcosis effects different divers differently depending on the ___________________

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

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

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.

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

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

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

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

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.

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

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

It is advisable to ________________ before entering the water.

The pressure gauge shows the level of pressure in the ____________

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

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

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

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

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

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

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

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

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

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 BCD is used to_____________________

Knifes must be used ________________________.

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

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

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

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

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

The lead weights usually are fixed to the weight belt; the belt should also...

The tendency of the body to float is:

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

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.

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