OHIO Hydronic Final
Comprehensive Resource To Help You Ace 2026-2027
Exams Includes Frequently Tested Questions With
ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
1. Since the greatest amount of body heat is lost by ___, it is logical that the
system that most satisfactorily controls this loss is best able to create a
comfort condition. - Correct Answer: Radiation
2. Hydronic heating and cooling is efficient because the ___ of water
circulating through the system is automatically increased or decreased to
meet varying weather conditions. - Correct Answer: temperature
3. Far less water than air is needed to distribute the same amount of heat,
meaning that hydronic water distribution can use piping that is ___ the
equivalent air ductwork. - Correct Answer: much smaller than
4. In a domestic hot water heating hydronic system, boiler water temperature
is usually maintained at ___ so heat can be immediately delivered to the
tank. - Correct Answer: 180°F-200°F
5. A typical modern hydronic heating and cooling system is divided into ___
main parts. - Correct Answer: three
,6. Hydronic system equipment that is normally installed in a mechanical room
includes ___. - Correct Answer: a chiller or other method to create
chilled HTF
7. A distribution system includes ___. - Correct Answer: piping and fittings
to transport the HTF
8. Examples of ___ units are unit heaters and fan coil terminal units. -
Correct Answer: forced convection
9. Every terminal unit, regardless of type or whether directly or indirectly
installed, requires ___. - Correct Answer: Union connections to attach
the terminal unit and distribution piping
10.A(n) ____________________ system is a heating and/or cooling system that
uses water or another fluid as a heat transfer medium to move heat from
one area to another. - Correct Answer: Hydronic
11.A(n) ____________________ hydronic system is a hydronic system that is,
at some point, open to the atmosphere. - Correct Answer: Open
12.There are ____________________ basic hydronic distribution types. -
Correct Answer: four
13.Comfort is achieved by controlling the rate and manner in which heat is
transferred from the body. - Correct Answer: True
,14.Forced convection occurs because of a combination of heat transfer by
conduction and heat transfer by actual movement of some of the fluid from
one place to another. - Correct Answer: False
15.Sensible heat is the heat applied to or removed from a substance that
results in a change of state. - Correct Answer: False
16.The amount of heat in British thermal units required to change the
temperature of one pound of a substance one degree Fahrenheit is called
the specific heat of that substance. - Correct Answer: True
17.The latent heat involved with changes between the liquid and vapor states
is called the latent heat of fusion. - Correct Answer: False
18.For practical purposes, enthalpy may be taken as the sum of sensible heat
and latent heat - Correct Answer: True
19.Humidity is always present in air. - Correct Answer: True
20.The amount of moisture required to saturate air is unaffected by the dry-
bulb temperature. - Correct Answer: False
21.Factors affecting the rate of latent heat rejection include the wet-bulb
temperature of the air, the humidity of the air, the amount of moisture on
the body's surface, and the rate of air circulation. - Correct Answer: True
, 22.Thermistor thermometers are not suitable for lower temperature ranges. -
Correct Answer: False
23.Liquids at rest exert pressure in all directions, downward, sideways, and
upward. - Correct Answer: True
24.Heat transfer is the flow of heat from one object or substance to another,
and it occurs because of a difference in ___. - Correct Answer:
Temperature
25.__ is the transfer of heat in which heat is moved from one location to
another through the circulation of a fluid, such as air or water. - Correct
Answer: convection
26.Temperature is an indirect measure of the ___ attained by the molecules in
a substance and is a measure of the intensity of heat. - Correct Answer:
velocity
27.Heat that causes changes in temperature that can be measured is ___ heat.
- Correct Answer: sensible
28.The basic unit used to measure a quantity of heat is the ___. - Correct
Answer: British Thermal Unit
Comprehensive Resource To Help You Ace 2026-2027
Exams Includes Frequently Tested Questions With
ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
1. Since the greatest amount of body heat is lost by ___, it is logical that the
system that most satisfactorily controls this loss is best able to create a
comfort condition. - Correct Answer: Radiation
2. Hydronic heating and cooling is efficient because the ___ of water
circulating through the system is automatically increased or decreased to
meet varying weather conditions. - Correct Answer: temperature
3. Far less water than air is needed to distribute the same amount of heat,
meaning that hydronic water distribution can use piping that is ___ the
equivalent air ductwork. - Correct Answer: much smaller than
4. In a domestic hot water heating hydronic system, boiler water temperature
is usually maintained at ___ so heat can be immediately delivered to the
tank. - Correct Answer: 180°F-200°F
5. A typical modern hydronic heating and cooling system is divided into ___
main parts. - Correct Answer: three
,6. Hydronic system equipment that is normally installed in a mechanical room
includes ___. - Correct Answer: a chiller or other method to create
chilled HTF
7. A distribution system includes ___. - Correct Answer: piping and fittings
to transport the HTF
8. Examples of ___ units are unit heaters and fan coil terminal units. -
Correct Answer: forced convection
9. Every terminal unit, regardless of type or whether directly or indirectly
installed, requires ___. - Correct Answer: Union connections to attach
the terminal unit and distribution piping
10.A(n) ____________________ system is a heating and/or cooling system that
uses water or another fluid as a heat transfer medium to move heat from
one area to another. - Correct Answer: Hydronic
11.A(n) ____________________ hydronic system is a hydronic system that is,
at some point, open to the atmosphere. - Correct Answer: Open
12.There are ____________________ basic hydronic distribution types. -
Correct Answer: four
13.Comfort is achieved by controlling the rate and manner in which heat is
transferred from the body. - Correct Answer: True
,14.Forced convection occurs because of a combination of heat transfer by
conduction and heat transfer by actual movement of some of the fluid from
one place to another. - Correct Answer: False
15.Sensible heat is the heat applied to or removed from a substance that
results in a change of state. - Correct Answer: False
16.The amount of heat in British thermal units required to change the
temperature of one pound of a substance one degree Fahrenheit is called
the specific heat of that substance. - Correct Answer: True
17.The latent heat involved with changes between the liquid and vapor states
is called the latent heat of fusion. - Correct Answer: False
18.For practical purposes, enthalpy may be taken as the sum of sensible heat
and latent heat - Correct Answer: True
19.Humidity is always present in air. - Correct Answer: True
20.The amount of moisture required to saturate air is unaffected by the dry-
bulb temperature. - Correct Answer: False
21.Factors affecting the rate of latent heat rejection include the wet-bulb
temperature of the air, the humidity of the air, the amount of moisture on
the body's surface, and the rate of air circulation. - Correct Answer: True
, 22.Thermistor thermometers are not suitable for lower temperature ranges. -
Correct Answer: False
23.Liquids at rest exert pressure in all directions, downward, sideways, and
upward. - Correct Answer: True
24.Heat transfer is the flow of heat from one object or substance to another,
and it occurs because of a difference in ___. - Correct Answer:
Temperature
25.__ is the transfer of heat in which heat is moved from one location to
another through the circulation of a fluid, such as air or water. - Correct
Answer: convection
26.Temperature is an indirect measure of the ___ attained by the molecules in
a substance and is a measure of the intensity of heat. - Correct Answer:
velocity
27.Heat that causes changes in temperature that can be measured is ___ heat.
- Correct Answer: sensible
28.The basic unit used to measure a quantity of heat is the ___. - Correct
Answer: British Thermal Unit
