1sd-Exam

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

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

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

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

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

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

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

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 ____________

Knifes must be used ________________________.

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

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.

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

Nitrogen narcosis effects different divers differently depending on the ___________________

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

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

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

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

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

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

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 pressure gauge shows the level of pressure in the ____________

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

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

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

It is advisable to ________________ before entering the water.

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

The BCD is used to_____________________

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?

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.

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

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

The tendency of the body to float is:

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

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

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)

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

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

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

The mask headstrap must

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

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

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...

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

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

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 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______________