wiping rags immediately or store them in firesafe
containers. Avoid trip hazards by maintaining proper
stowage. Do not allow fire hazards to accumulate.
REVIEW 9 QUESTIONS
Q1. Before beginning work to repair a piece of
equipment, you should take what action?
Q2. What personnel are authorized to operate gas
welding or cutting equipment?
Q3. When working around rotating machinery, what
types of clothing/equipment should you wear?
LIQUIDS UNDER PRESSURE
Any liquid in a system that has been pressurized is
to be considered dangerous until the pressure has been
removed. For example, the ship’s fire-main system uses
salt water that has been pressurized to make the water
available throughout the ship. The pressurized water in
the system is not dangerous, but the misuse of it is.
Therefore, you should observe the following safety
practices when using the fire-main system or any other
system that may have pressurized liquid in it:
Never connect or disconnect a hose from the
system until the pressure has been removed. This
can be done by shutting off the valve on the
fire-main system.
Never use ruptured or worn hoses with any
system that has pressure in it.
Never point a charged (pressurized) fire hose at
anyone.
Spray paints, butane fluids, lacquers, and other
aerosol products contain liquids under pressure.
Be extremely careful with these containers.
Don’t use these containers near a flame, throw
them in a fire, or puncture the containers.
ACIDS, ALKALIES, AND OTHER
CHEMICALS
Acids and alkalies are used in the Navy in the form
of pure compounds and mixtures. Acids and alkalies are
hazardous because they’re corrosive (cause chemical
burns) when they come in direct contact with the skin,
eyes, or other body tissues. They can cause breathing
difficulties or injure respiratory organs if too much of
the acid mist is inhaled. The acids and alkalies can also
cause dangerous chemical reactions if not handled
properly.
When handling acids, alkalies, or other chemicals,
you should observe the following precautions:
Wear chemically resistant rubber or plastic
gloves.
Wear chemically resistant rubber or plastic
goggles. You may need to wear a plastic face
shield in addition to the goggles.
Wear chemically resistant rubber boots or
overshoes with resistant soles. Wear trousers
outside of the boots.
Wear a rubber or plastic apron.
Wear a respirator when indicated for the
chemical you are working with.
Persons who have been exposed to acids or alkalies
should seek medical attention immediately.
MARINE SANITATION SYSTEMS
Sewage is a mixture of all liquid domestic wastes,
especially human body wastes (fecal matter and urine).
Sewage contains large numbers of microorganisms,
some of which are disease bearing. Bacteria and viruses
enter the human body through the mouth, nose, open
sores, and so on. Therefore, you must observe the
following basic precautions when working in
sewage-handling areas.
19-18
Student Notes:
