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NAUI IQP - Environment & Equipment Exam Questions and Answers
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NAUI IQP - Environment & Equipment Exam Questions and Answers
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NAUI IQP - Environment & EquipmentExam Questions and Answers
What pressure will a scuba cylinder with a rated working pressure of 3000 psig (207
bar), be exposed to during a hydrostatic test?
a.5000 psig (345 bar)
b.4280 psig (293 bar)
c.2250 psig (155 bar)
d.4980 psig (414 bar) - Answer -a.5000 psig (345 bar)
Which principle represents one basis for the hydrostatic testing of scuba cylinders?
Permanent expansion. Stationary expansion. Indefinite expansion. Soluble expansion. -
Answer -Permanent expansion
If a visual cylinder inspection reveals corrosion inside a scuba cylinder, it may require
cleaning by a process called:
Stripping.Tumbling. Grinding. Sand Blasting. - Answer -Tumbling
Which of the following is considered proper care of a scuba cylinder?
Exceeded the maximum allowable working pressure when filling.Preventing moisture
from entering the cylinder. Filling cylinders rapidly, approximately 1000 to 1500 psig (69
to 103 bar) per minute. Heating cylinders to a high temperature. - Answer -Preventing
moisture from entering the cylinder
Two cylinder valves in common use today are:
The K-valve and DIN valve. The R-valve and B- valve. The X-valve and DIN valve. The
B-valve and K-valve. - Answer -The K-valve and DIN valve
Which valve is an example of a special scuba valve that is required for certain types of
specialty diving such as deep diving with a single cylinder?
Y valve J valve K valve R valve - Answer -Y valve
Which internal valve designs are available in the first stage of scuba regulators?
Diaphragm; Pump
Piston; Diaphragm
Rod; Lifter
Ring; Shaft - Answer -Piston; Diaphragm
, Which valve is unaffected by cylinder air pressure with regard to the force needed to
operate the valve?
Unbalanced
Direct
Balanced
Linear - Answer -Balanced
Which regulator second stage design uses air pressure rather than mechanical leverage
to open the main valve?
Unbalanced Torque Fluid Pilot - Answer -Pilot
In the event of a regulator first stage malfunction, which type of valve design would be
likely to eliminate air flow to the diver?
Upstream Sidestream Backstream Downstream - Answer -Upstream
When considering a regulator for purchase or use, an important point to remember is
that certain regulators may not be capable of delivering ______ flow rates at ______
cylinder pressure during an air sharing emergency.
low; high
high; low
low; low
high; high - Answer -high;low
Which diving instrument incorporates a bourdon tube mechanism?
Digital gauges
Cylinder pressure gauges
Non-linear gauges
Dive computers - Answer -Cylinder pressure gauges
Two benefits derived from using an electronic dive computer are _____.
-Unlimited dive time and water temperature display
-Accurate monitoring of ascent rate and, if executing a multi-level diving profile,
avoidance of the maximum time/depth penalty
-They always prevent DCS and sound off when ascent rate is exceeded
-Unreliable time and depth information - Answer -Accurate monitoring of ascent rate
and, if executing a multi-level diving profile, avoidance of the maximum time/depth
penalty
Green discoloration on the first stage of a scuba regulator indicates _____.
Corrosion from a steel cylinder
Carbon graphite dust from the scuba air compressor
Water has most likely entered the first stage
None of the above - Answer -Water has most likely entered the first stage
An air compressor used for filling scuba cylinders operates by the principle of _____.
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