5000 psi (345 bar) - ANSWER What pressure will a scuba cylinder with a rated working pressure of 3000 psi (207 bar) be exposed to during a hydrostatic test?
Permanent expansion - ANSWER Which principle represents one basis for the hydrostatic testing of scuba cylinders?
Tumbling - ANSWER If a...
5000 psi (345 bar) - ANSWER What pressure will a scuba cylinder with a rated working pressure of 3000
psi (207 bar) be exposed to during a hydrostatic test?
Permanent expansion - ANSWER Which principle represents one basis for the hydrostatic testing of
scuba cylinders?
Tumbling - ANSWER If a visual cylinder inspection reveals corrosion inside a scuba cylinder, it may
require cleaning by a process called...
Preventing moisture from entering the cylinder. - ANSWER Which of the following is considered proper
care of a scuba cylinder?
DIN valve - ANSWER Which of the following valve types incorporates a "captured o-ring"?
Y-valve - ANSWER 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?
Piston; Diaphragm - ANSWER Which internal valve designs are available in the first stage of scuba
regulators?
Balanced - ANSWER Which valve is unaffected by cylinder air pressure with regard to how much force is
needed to open the valve?
, Water has most likely entered the first stage. - ANSWER Green discoloration on the first stage of a scuba
regulator indicates...
Pilot - ANSWER Which regulator second stage design uses air pressure rather than mechanical leverage
to open the main valve?
Upstream - ANSWER In the event of a regulator first stage malfunction, which type of valve design would
be likely to eliminate air flow to the diver?
Receive a formal orientation from a diving professional familiar with the area - ANSWER To help avoid
injury when diving in an unknown location divers should...
Plunging breaker - ANSWER The type of breaking wave that produces the greatest force when breaking
is...
Entering the water as slowly as possible immediately after a wave breaks, getting beyond the surf zone
quickly, before the next wave breaks. - ANSWER If the water conditions are reasonable to make a beach
dive, all of the following procedures are suggested except...
Littoral, planktonic, nektonic, benthic. - ANSWER The four basic plant and animal life zones in the ocean
are...
Poisonous - ANSWER A marine animal whose tissues are toxic, either in part or entirety is...
Nematocysts - ANSWER Scyphozoans, or true jellyfish, possess stinging cells in their tentacles called...
Alligator snapping turtle - ANSWER Which creature poses a threat to divers in a freshwater environment?
78.04% nitrogen, 20.94% oxygen, .33% carbon dioxide, .934% inert gas - ANSWER Compressed air, the
kind primarily used by recreational divers, is composed of
Mass; volume - ANSWER Density is defined as the _____ per unit _____ of a substance
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