NAUI Master Scuba Diver exam
with verified solutions
what pressure will a scuba cylinder with a rated working pressure of 3000
psi (207 bar) be exposed to during a hydrostatic test? - answer 5000 psig
(345 bar)
Which principle represents one basis for the hydrostatic testing of scuba
cylinders? - answer permanent expansion
if a visual cylinder inspection reveals corrosion inside a scuba cylinder, it
may require cleaning by a process called - answer tumbling
which of the following is considered proper care of a scuba cylinder? -
answer preventing moisture from entering the cylinder
two cylinder valves in common use today are - 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? - answer y valve
which internal valve designs are available in the first stage of scuba
regulators? - answer piston; diaphragm
which valve is unaffected by cylinder air pressure with regard to the force
needed to operate the valve? - answer balanced
which regulator second stage design uses air pressure rather than
mechanical leverage to open the main valve? - 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? - 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 -
answer high; low
which diving instrument incorporates a Bourdon tube mechanism? -
answer cylinder pressure gauges
two benefits derived from using an electronic dive computer are - 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 -
answer water has most likely entered the first stage
an air compressor used for filling scuba cylinders operates by the principle
of - answer Boyle's Law
dry suits form a waterproof barrier, but require undergarments to be
effective in cold water - answer true
in order to make an informed decision on equipment purchase, you need
to have a solid educational background concerning the ____ of diving
equipment - answer types, method of operation, care and maintenance
the distance between successive wave crests is defined as - answer
wavelength
the highest tides are called ____ tides, and the lowest tides are called ____
tides - answer spring; neap
with verified solutions
what pressure will a scuba cylinder with a rated working pressure of 3000
psi (207 bar) be exposed to during a hydrostatic test? - answer 5000 psig
(345 bar)
Which principle represents one basis for the hydrostatic testing of scuba
cylinders? - answer permanent expansion
if a visual cylinder inspection reveals corrosion inside a scuba cylinder, it
may require cleaning by a process called - answer tumbling
which of the following is considered proper care of a scuba cylinder? -
answer preventing moisture from entering the cylinder
two cylinder valves in common use today are - 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? - answer y valve
which internal valve designs are available in the first stage of scuba
regulators? - answer piston; diaphragm
which valve is unaffected by cylinder air pressure with regard to the force
needed to operate the valve? - answer balanced
which regulator second stage design uses air pressure rather than
mechanical leverage to open the main valve? - 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? - 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 -
answer high; low
which diving instrument incorporates a Bourdon tube mechanism? -
answer cylinder pressure gauges
two benefits derived from using an electronic dive computer are - 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 -
answer water has most likely entered the first stage
an air compressor used for filling scuba cylinders operates by the principle
of - answer Boyle's Law
dry suits form a waterproof barrier, but require undergarments to be
effective in cold water - answer true
in order to make an informed decision on equipment purchase, you need
to have a solid educational background concerning the ____ of diving
equipment - answer types, method of operation, care and maintenance
the distance between successive wave crests is defined as - answer
wavelength
the highest tides are called ____ tides, and the lowest tides are called ____
tides - answer spring; neap
