HUN1201 MIDTERM [CH
1,2,3,4,5,6,7,8,&15] (IRSC)
COMPREHENSIVE STUDY GUIDE 2026
FULL QUESTIONS AND SOLUTIONS
GRADED A+
◍ Backflow condition occurs when the system pressure.
Answer: Decreases below normal
◍ Which of the following constitutes an actual health hazard with the
consumer being subjected to potentially lethal waterborne disease or
illness?.
Answer: Toxic
◍ This type of backflow may occur with an indirect cross connection.
Answer: Back siphonage
◍ Back siphonage associated with undersized piping may be caused by.
Answer: High velocity flow of water through a pipe tee
◍ What is the weight of a cubic foot of water at sea level.
Answer: 62.4 LBS
◍ Which of these is a potential back pressure Plumbing connection.
Answer: A process water line
◍ Although the quality of the water is impaired with respect to taste odor or
utility, this does not constitute an actual health hazard.
Answer: Pollution
◍ Any arrangement of pipes, tees, fittings, fixtures, or devices that connects a
, non-potable system to a potable water system is called.
Answer: Cross connection
◍ What happens to atmospheric pressure as you increase elevation above sea
level.
Answer: It decreases
◍ A column of water would have to be____inches in height in order to exert a
pressure of 1PIG at the base.
Answer: 27.75
◍ Air of the surrounding atmosphere and its existing pressure is called.
Answer: Atmospheric air
◍ Containment protection.
Answer: Offers no protection to individuals within a facility
◍ To convert feet of head to psi you must.
Answer: Multiplied by .433
◍ Back siphonage can be caused by an undersized water pipe carrying water at
a high velocity due to.
Answer: A Venturi effect
◍ The unintentional reversal of flow in a potable water system, which may
result in contamination or pollution of the system is.
Answer: Backflow
◍ If Q= volumeV = average velocityA = cross-sectional area of the pipe.
Answer: Q = A x V
◍ The maximum distance that an absolute vacuum at sea level can lift a
column of water is.
Answer: 33.9 feet
◍ An absolute pressure of 25 psi a at sea level is equal to approximately.
Answer: 10 PSIG
◍ The degree of hazard is.
1,2,3,4,5,6,7,8,&15] (IRSC)
COMPREHENSIVE STUDY GUIDE 2026
FULL QUESTIONS AND SOLUTIONS
GRADED A+
◍ Backflow condition occurs when the system pressure.
Answer: Decreases below normal
◍ Which of the following constitutes an actual health hazard with the
consumer being subjected to potentially lethal waterborne disease or
illness?.
Answer: Toxic
◍ This type of backflow may occur with an indirect cross connection.
Answer: Back siphonage
◍ Back siphonage associated with undersized piping may be caused by.
Answer: High velocity flow of water through a pipe tee
◍ What is the weight of a cubic foot of water at sea level.
Answer: 62.4 LBS
◍ Which of these is a potential back pressure Plumbing connection.
Answer: A process water line
◍ Although the quality of the water is impaired with respect to taste odor or
utility, this does not constitute an actual health hazard.
Answer: Pollution
◍ Any arrangement of pipes, tees, fittings, fixtures, or devices that connects a
, non-potable system to a potable water system is called.
Answer: Cross connection
◍ What happens to atmospheric pressure as you increase elevation above sea
level.
Answer: It decreases
◍ A column of water would have to be____inches in height in order to exert a
pressure of 1PIG at the base.
Answer: 27.75
◍ Air of the surrounding atmosphere and its existing pressure is called.
Answer: Atmospheric air
◍ Containment protection.
Answer: Offers no protection to individuals within a facility
◍ To convert feet of head to psi you must.
Answer: Multiplied by .433
◍ Back siphonage can be caused by an undersized water pipe carrying water at
a high velocity due to.
Answer: A Venturi effect
◍ The unintentional reversal of flow in a potable water system, which may
result in contamination or pollution of the system is.
Answer: Backflow
◍ If Q= volumeV = average velocityA = cross-sectional area of the pipe.
Answer: Q = A x V
◍ The maximum distance that an absolute vacuum at sea level can lift a
column of water is.
Answer: 33.9 feet
◍ An absolute pressure of 25 psi a at sea level is equal to approximately.
Answer: 10 PSIG
◍ The degree of hazard is.
