AOA BOOK REVISION QUESTIONS AND
100% VERIFIED ANSWERS
Water's density, or its weight per unit of volume is measured in:
Pounds per cubic foot
For fire protection purposes, ordinary fresh water is generally considered to weigh:
62.4 lbs/ft3 or 8.3 lb/gal
What is the specific gravity of water?
1.0
At 212 degrees Fahrenheit, water converts to steam and expands how many times its
original volume?
1,700 times
Accumulation of water inside a structure can lead to an increased potential for what to
happen?
Structural collapse
The term for Force per unit area exerted by a liquid or gas measured in pounds per square
inch (psi)
Pressure
This term is a simple measure of weight, usually expressed in pounds or kilograms
Force
________ is an influence that causes a change in the speed, direction or shape of a
substance
Force
The weight of 1 cubit foot of water weighs approximately ___ lbs
62.4 lbs
, A 1 inch square column of water 1 foot high exerts a pressure at its base of ___ psi
0.434 psi
A column of water ___ feet high exerts a pressure of 1 psi at its base
2.304 feet
The speed at which a fluid travels through a hose or pipe is determined by the pressure
upon that fluid as well as the size of the orifice through which it is flowing. This speed is
often called ____________.
Velocity
Which Principle of pressure states that fluid pressure is perpendicular to any surface on
which it acts?
First principle
Which Principle of pressure states that fluid pressure at a point in fluid at rest is the same
intensity in all directions?
Second principle
Which Principle of pressure is used in hydrostatic testing?
Second principle
Which Principle of pressure states that pressure applied to a confined liquid is transmitted
equally in all directions?
Third principle
Due to the increase in water pressure requirements necessary for the height of the building,
__________________ are installed in standpipe systems that serve as high-rise buildings
Pressure-regulating devices
Which principle of pressure states that the pressure of a liquid in an open vessel
is proportional to its depth?
Fourth principle
100% VERIFIED ANSWERS
Water's density, or its weight per unit of volume is measured in:
Pounds per cubic foot
For fire protection purposes, ordinary fresh water is generally considered to weigh:
62.4 lbs/ft3 or 8.3 lb/gal
What is the specific gravity of water?
1.0
At 212 degrees Fahrenheit, water converts to steam and expands how many times its
original volume?
1,700 times
Accumulation of water inside a structure can lead to an increased potential for what to
happen?
Structural collapse
The term for Force per unit area exerted by a liquid or gas measured in pounds per square
inch (psi)
Pressure
This term is a simple measure of weight, usually expressed in pounds or kilograms
Force
________ is an influence that causes a change in the speed, direction or shape of a
substance
Force
The weight of 1 cubit foot of water weighs approximately ___ lbs
62.4 lbs
, A 1 inch square column of water 1 foot high exerts a pressure at its base of ___ psi
0.434 psi
A column of water ___ feet high exerts a pressure of 1 psi at its base
2.304 feet
The speed at which a fluid travels through a hose or pipe is determined by the pressure
upon that fluid as well as the size of the orifice through which it is flowing. This speed is
often called ____________.
Velocity
Which Principle of pressure states that fluid pressure is perpendicular to any surface on
which it acts?
First principle
Which Principle of pressure states that fluid pressure at a point in fluid at rest is the same
intensity in all directions?
Second principle
Which Principle of pressure is used in hydrostatic testing?
Second principle
Which Principle of pressure states that pressure applied to a confined liquid is transmitted
equally in all directions?
Third principle
Due to the increase in water pressure requirements necessary for the height of the building,
__________________ are installed in standpipe systems that serve as high-rise buildings
Pressure-regulating devices
Which principle of pressure states that the pressure of a liquid in an open vessel
is proportional to its depth?
Fourth principle
