EASE Physics Quiz

This Quiz will help you determine if your academic knowledge is strong enough to participate in a EASE / PADI IDC (Instuctor Development Course) or a CDC (Career Development Course). Upon SUBMITING the answers, the quiz will be reviewed by an EASE Course Director, and will automatically give you a score. Use this quiz to study the academic areas you have done poorly in. Being prepared is very important, by studying the required course manuals prior to the IDC and IE  will assure your passing.

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1. A scuba tank containing 2% carbon monoxide at the surface is taken down to 66 ft./20m of sea water. If a diver were to breath from the tank at this depth, it would have what percent of contamination?
6%

4%
2%
1%
2. If an object is neutrally buoyant in salt water, what will it be in fresh water?
Positively buoyant

Negatively buoyant
Centraly buoyant
Neutrally buoyant
3. What is the absolute pressure at 42 ft/ or 13m of fresh water?
18.14 psi/1.26 atm

32.84 psi/2.26 atm
18.69 psi/1.3 atm
38.39 psi/2.3 atm
4. In a ballon filled with air at 100 ft./30 m of sea water, what is the partial pressure of the nitrogen?
.8 atm

.2 atm
3.2 atm
4.0 atm
5. If a scuba tank filled to capacity is put into a hot car, what will happen to it?
It's volume will increase

It's volume will decrease
It's presure will increase
It's pressure will decrease
6. How much air must be added to a lift bag in order to lift an object which displaces 2 cu. ft./75 l at a depth of 100 ft./30 m in the ocean?
2 cu. ft. / 75 liters

4 cu. ft./ 150 liters
6 cu. ft./ 225 liters
None of the above, not enough information
7. Under water sound travels _______ times faster than in Air?
3

4
5
6
8. Visual reversal means that objects underwater are the way they look at the surface?
True

False
9. Water makes objects appear ____ % larger and appear ____?
28%, closer than they are

25%, closer than they are
28%, farther away than they are
25%, farther away than they are
10. If the volume of a flexible container is 4 cu. ft./15 l at a depth of 33ft/10m of sea water, what would the volume be at 132ft/40m? and at the surface?
1.6 cu. ft./6 liters ; 8 cu. ft./30 liters

.8 cu. ft./8 liters ; 10 cu. ft./40 liters
2.6 cu. ft./10 liters ; 8 cu. ft./30 liters
.8 cu. ft./8 liters ; 8 cu. ft./30 liters
11. Archimedes Principle deals with
Vision

Equipment
Bouyancy
Sound
12. What is the absolute pressure at a depth of 150 ft / 45 metres in seawater.
74.1 psia / 5 ata

150 psia / 45 ata
94.1 psia / 10 ata
81.45 psia / 5.5 ata
13. What is ambient pressure at 50 ft / 15 meters in seawater
29.75 psia / 2 ata

21.1 psia / 1 ata
30.0 psia / 2.2 ata
36.95 psia / 2.5 ata
14. What is gauge pressure at 100 ft / 30 meters in salt water
44.5 psig / 3 atm

33.4 psig / 2.5 atm
14.7 psig / 1.0 atm
10 psig / .5 atm
15. In salt water, each ft./meter = ____, In fresh water, each ft./meter =____.
.445 psi / .10 atm and .432 psi / .97 atm

.425 psi / .090 atm and .412 psi /.087 atm
.400 psi / .080 atm and .332 psi /.077 atm
.334 psi / .070 atm and .324 psi / .070 atm
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