WATER SUPPLY SYSTEMS 2026 EXAMS SCRIPT QUESTIONS
AND SOLUTIONS RATED A+
✔✔What is Surface Gravity? - ✔✔The density of liquids in relation to water - Water has
a given value of 1
✔✔Specific Gravity of water at 68F - ✔✔0.998
✔✔Specific Gravity of Commercial Solvent at 68F - ✔✔0.717
✔✔Specific Gravity of Carbon Tetrachloride at 68F - ✔✔1.582
✔✔Specific Gravity of Medium Lubrication Oil at 68F - ✔✔0.891
✔✔Specific Gravity of Medium Fuel Oil at 68F - ✔✔0.854
✔✔Specific Gravity of Heavy Fuel Oil at 68F - ✔✔0.908
✔✔Specific Gravity of Regular Gasoline at 68F - ✔✔0.724
✔✔Specific Gravity of Turpentine at 68F - ✔✔0.862
✔✔Specific Gravity of Ethyl Fuel at 68F - ✔✔0.789
✔✔Specific Gravity of Benzene at 68F - ✔✔0.879
✔✔Specific Gravity of Glycerin at 68F - ✔✔1.262
✔✔Specific Gravity of Light Machinery Oil at 68F - ✔✔0.907
✔✔Specific Gravity of Air at 68F - ✔✔0.0012
✔✔Specific Gravity of Ammonia at 68F - ✔✔0.0007
✔✔Specific Gravity of Carbon Dioxide at 68F - ✔✔0.0018
✔✔Specific Gravity of Methane at 68F - ✔✔0.0017
✔✔4 Advantages of Water - ✔✔1. Heat-Absorbing Capacity
2. Surface Area
3. Availability
4. Cost
, ✔✔7 Disadvantages of Water - ✔✔High Surface Tension
Reactivity
Low Opacity and reflectivity
Freezing point
Conductivity
Contaminated Runoff
Weight
✔✔What is water pressure in relation to the fire service? - ✔✔The force that moves
water though a conduit - either a pipe or hose
✔✔First Principle of pressure - ✔✔Fluid pressure is perpendicular to any surface on
which it acts
✔✔Second Principle of Pressure - ✔✔Fluid pressure at a point in a fluid at rest is the
same intensity in all directions
✔✔Third Principle of Pressure - ✔✔Pressure applied to a confined fluid from without is
transmitted equally in all directions
✔✔Fourth Principle of Pressure - ✔✔The pressure of a liquid in an open vessel is
proportional to its depth
✔✔Fifth Principle of Pressure - ✔✔The pressure of a liquid in an open vessel is
proportional to the density of the liquid
✔✔Sixth Principle of Pressure - ✔✔The pressure of a liquid on the bottom of a vessel is
independent of the shape of the vessel
✔✔What are the six types of pressure? - ✔✔Atmospheric Pressure
Head pressure
Static pressure
Normal operating pressure
Residual pressure
Flow pressure (Velocity pressure)
✔✔What is atmospheric pressure? - ✔✔The pressure that is exerted on the earth by the
atmosphere itself
✔✔What is head pressure? - ✔✔The height that a pressure can lift a column of liquid -
A tank 100ft deep has 100ft of head
✔✔What is static pressure? - ✔✔It is stored potential energy available to force water
though pipes, fittings, fire hose, and adapters
AND SOLUTIONS RATED A+
✔✔What is Surface Gravity? - ✔✔The density of liquids in relation to water - Water has
a given value of 1
✔✔Specific Gravity of water at 68F - ✔✔0.998
✔✔Specific Gravity of Commercial Solvent at 68F - ✔✔0.717
✔✔Specific Gravity of Carbon Tetrachloride at 68F - ✔✔1.582
✔✔Specific Gravity of Medium Lubrication Oil at 68F - ✔✔0.891
✔✔Specific Gravity of Medium Fuel Oil at 68F - ✔✔0.854
✔✔Specific Gravity of Heavy Fuel Oil at 68F - ✔✔0.908
✔✔Specific Gravity of Regular Gasoline at 68F - ✔✔0.724
✔✔Specific Gravity of Turpentine at 68F - ✔✔0.862
✔✔Specific Gravity of Ethyl Fuel at 68F - ✔✔0.789
✔✔Specific Gravity of Benzene at 68F - ✔✔0.879
✔✔Specific Gravity of Glycerin at 68F - ✔✔1.262
✔✔Specific Gravity of Light Machinery Oil at 68F - ✔✔0.907
✔✔Specific Gravity of Air at 68F - ✔✔0.0012
✔✔Specific Gravity of Ammonia at 68F - ✔✔0.0007
✔✔Specific Gravity of Carbon Dioxide at 68F - ✔✔0.0018
✔✔Specific Gravity of Methane at 68F - ✔✔0.0017
✔✔4 Advantages of Water - ✔✔1. Heat-Absorbing Capacity
2. Surface Area
3. Availability
4. Cost
, ✔✔7 Disadvantages of Water - ✔✔High Surface Tension
Reactivity
Low Opacity and reflectivity
Freezing point
Conductivity
Contaminated Runoff
Weight
✔✔What is water pressure in relation to the fire service? - ✔✔The force that moves
water though a conduit - either a pipe or hose
✔✔First Principle of pressure - ✔✔Fluid pressure is perpendicular to any surface on
which it acts
✔✔Second Principle of Pressure - ✔✔Fluid pressure at a point in a fluid at rest is the
same intensity in all directions
✔✔Third Principle of Pressure - ✔✔Pressure applied to a confined fluid from without is
transmitted equally in all directions
✔✔Fourth Principle of Pressure - ✔✔The pressure of a liquid in an open vessel is
proportional to its depth
✔✔Fifth Principle of Pressure - ✔✔The pressure of a liquid in an open vessel is
proportional to the density of the liquid
✔✔Sixth Principle of Pressure - ✔✔The pressure of a liquid on the bottom of a vessel is
independent of the shape of the vessel
✔✔What are the six types of pressure? - ✔✔Atmospheric Pressure
Head pressure
Static pressure
Normal operating pressure
Residual pressure
Flow pressure (Velocity pressure)
✔✔What is atmospheric pressure? - ✔✔The pressure that is exerted on the earth by the
atmosphere itself
✔✔What is head pressure? - ✔✔The height that a pressure can lift a column of liquid -
A tank 100ft deep has 100ft of head
✔✔What is static pressure? - ✔✔It is stored potential energy available to force water
though pipes, fittings, fire hose, and adapters
