1sd-Exam

The BCD is used to_____________________

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

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

Knifes must be used ________________________.

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.

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

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

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

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

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

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

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)

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

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

Underwater it is always necessary to ____________ the mask

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

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

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

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?

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

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

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

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.

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

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

Nitrogen narcosis effects different divers differently depending on the ___________________

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

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

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 pressure gauge shows the level of pressure in the ____________

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

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

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

The mask headstrap must

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.

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

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

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

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

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.

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

It is advisable to ________________ before entering the water.

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

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

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

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

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