Refrigeration: Exam- Operators Final
Exam Questions and All Correct
Answers 2026 Updated.
Freon 22 - Answer A refrigerant that has the following characteristics: it is nonflammable,
odourless, nontoxic, it does not have a corrosive effect on metal if water is present and at
atmospheric pressure it has a boiling point of -40.6*c.
Miscibility - Answer The ability of a refrigerant to be dissolved into oil and vice versa is called:
Ammonia is too toxic - Answer Ammonia systems are seldom used for air conditioning
purposes in large buildings mainly because
Section VI - Answer The ASME section that deals with Recommended Rules for Care &
Operation of Heating Boilers is
fittings - Answer According to the Act, valves, gauges and regulating or controlling devices are
called
the Boiler and Pressure Vessel Act. - Answer To determine how to you appeal a decision by
the Boiler and Pressure Vessel Safety Branch requiring your plant to have certified operators in
attendance you would refer to
Recommended Rules for the Care and Operation of Heating Boilers - Answer The ASME Code
Section VI is called
Part HLW - Requirements for Portable Water Heaters
Part HLW - Requirements for Portable Water Heaters
Part HF - Subpart HW - Requirements for Boilers Fabricated by Welding - Answer Three
subsections of ASME Section IV are
less heat content than the water. - Answer In a mixture of ice and water at 0oC and
equilibrium, the ice has
1 joule of heat. - Answer One Newton-Meter of work is equivalent to
kJ/kg. - Answer The unit of specific heat in the SI system is
,492 C - Answer The freezing temperature of pure water on the rankine scale is
373 C - Answer The boiling temperature of pure water on the kelvin scale is
convection. - Answer The transfer of heat within a fluid due to the movement of the fluid is
called
superheated. - Answer When a gas, such as steam, is heated above the boiling temperature it
is said to be
373 K - Answer Convert 212oF to Kelvin.
force per unit area - Answer Pressure is defined as
103.3 kPa. - Answer A pressure of 15 psi is equal to
density - Answer The mass of a unit volume of a substance is called its
molecular activity within a substance. - Answer Heat content or enthalpy is a measure of the
net refrigerating effect. - Answer The amount of heat absorbed by the refrigerant in the
evaporator expressed as kJ/kg is called
the heat needed to melt 1 tonne of ice at a temperature of 0*C in 24 hours. - Answer One
tonne of refrigeration is equivalent to
near the top. - Answer In an icebox, the ice should be located
False, this is true of the regulations only. - Answer The application of the Act is left to the
discretion of the director or administrator of the department since not all circumstances are the
same. True or False
the boiler and pressure vessel regulation. - Answer A reasonable standard against which to
measure the knowledge and/or performance of those people engaged in the installation,
operation, use, and repair of pressure vessels is provided by
- Answer The ASME section that deals with Recommended Rules for Care & Operation of
Power Boilers is
, Section VII - Answer The ASME section that deals with Recommended Rules for Care &
Operation of Power Boilers is
the Boiler and Pressure Vessel Regulations. - Answer To determine how to prepare a boiler
for internal inspection by an inspecting power engineer you could refer to
atmospheric pressure - Answer The pressure exerted on the surface of the earth due to the
weight of the air surrounding the earth is called
heat, when added to a substance, that causes a rise in temperature of the substance with no
change in state - Answer Sensible heat is
gauge pressure. - Answer Pressure indicated on a common gauge connected to the discharge
of a pump is called
149 C - Answer Convert 300o Fahrenheit to Celcius.
False. Heat is a measure of molecular activity the more the molecules of an object or substance
are moving, the higher the heat content. Temperature is a measure of the heat content of a
substance as long as all of the substance is in the same state (solid, liquid or gas). The
temperature of a substance is independent of the amount of substance whereas heat content
takes into account the mass of the substance. Since there are more molecules the increased
mass, the heat content of the mass increases as the temperature remains constant. Steam has
much more heat content than the same mass of water at the same temperature. - Answer 1
kg of steam at a temperature of 100oC has the same heat content as 1 kg of water at the same
temperature. True or False
heat required to change a substance from the solid state to the liquid state with no change in
temperature - Answer Latent heat of Fusion is
The Second Law of Thermodynamics. - Answer The law that states that heat will only flow
from a hotter substance to a colder one is
less heat content than the water. - Answer In a mixture of ice and water at 0*C and
equilibrium, the ice has
molecular activity within a substance. - Answer Heat content or enthalpy is a measure of the
Exam Questions and All Correct
Answers 2026 Updated.
Freon 22 - Answer A refrigerant that has the following characteristics: it is nonflammable,
odourless, nontoxic, it does not have a corrosive effect on metal if water is present and at
atmospheric pressure it has a boiling point of -40.6*c.
Miscibility - Answer The ability of a refrigerant to be dissolved into oil and vice versa is called:
Ammonia is too toxic - Answer Ammonia systems are seldom used for air conditioning
purposes in large buildings mainly because
Section VI - Answer The ASME section that deals with Recommended Rules for Care &
Operation of Heating Boilers is
fittings - Answer According to the Act, valves, gauges and regulating or controlling devices are
called
the Boiler and Pressure Vessel Act. - Answer To determine how to you appeal a decision by
the Boiler and Pressure Vessel Safety Branch requiring your plant to have certified operators in
attendance you would refer to
Recommended Rules for the Care and Operation of Heating Boilers - Answer The ASME Code
Section VI is called
Part HLW - Requirements for Portable Water Heaters
Part HLW - Requirements for Portable Water Heaters
Part HF - Subpart HW - Requirements for Boilers Fabricated by Welding - Answer Three
subsections of ASME Section IV are
less heat content than the water. - Answer In a mixture of ice and water at 0oC and
equilibrium, the ice has
1 joule of heat. - Answer One Newton-Meter of work is equivalent to
kJ/kg. - Answer The unit of specific heat in the SI system is
,492 C - Answer The freezing temperature of pure water on the rankine scale is
373 C - Answer The boiling temperature of pure water on the kelvin scale is
convection. - Answer The transfer of heat within a fluid due to the movement of the fluid is
called
superheated. - Answer When a gas, such as steam, is heated above the boiling temperature it
is said to be
373 K - Answer Convert 212oF to Kelvin.
force per unit area - Answer Pressure is defined as
103.3 kPa. - Answer A pressure of 15 psi is equal to
density - Answer The mass of a unit volume of a substance is called its
molecular activity within a substance. - Answer Heat content or enthalpy is a measure of the
net refrigerating effect. - Answer The amount of heat absorbed by the refrigerant in the
evaporator expressed as kJ/kg is called
the heat needed to melt 1 tonne of ice at a temperature of 0*C in 24 hours. - Answer One
tonne of refrigeration is equivalent to
near the top. - Answer In an icebox, the ice should be located
False, this is true of the regulations only. - Answer The application of the Act is left to the
discretion of the director or administrator of the department since not all circumstances are the
same. True or False
the boiler and pressure vessel regulation. - Answer A reasonable standard against which to
measure the knowledge and/or performance of those people engaged in the installation,
operation, use, and repair of pressure vessels is provided by
- Answer The ASME section that deals with Recommended Rules for Care & Operation of
Power Boilers is
, Section VII - Answer The ASME section that deals with Recommended Rules for Care &
Operation of Power Boilers is
the Boiler and Pressure Vessel Regulations. - Answer To determine how to prepare a boiler
for internal inspection by an inspecting power engineer you could refer to
atmospheric pressure - Answer The pressure exerted on the surface of the earth due to the
weight of the air surrounding the earth is called
heat, when added to a substance, that causes a rise in temperature of the substance with no
change in state - Answer Sensible heat is
gauge pressure. - Answer Pressure indicated on a common gauge connected to the discharge
of a pump is called
149 C - Answer Convert 300o Fahrenheit to Celcius.
False. Heat is a measure of molecular activity the more the molecules of an object or substance
are moving, the higher the heat content. Temperature is a measure of the heat content of a
substance as long as all of the substance is in the same state (solid, liquid or gas). The
temperature of a substance is independent of the amount of substance whereas heat content
takes into account the mass of the substance. Since there are more molecules the increased
mass, the heat content of the mass increases as the temperature remains constant. Steam has
much more heat content than the same mass of water at the same temperature. - Answer 1
kg of steam at a temperature of 100oC has the same heat content as 1 kg of water at the same
temperature. True or False
heat required to change a substance from the solid state to the liquid state with no change in
temperature - Answer Latent heat of Fusion is
The Second Law of Thermodynamics. - Answer The law that states that heat will only flow
from a hotter substance to a colder one is
less heat content than the water. - Answer In a mixture of ice and water at 0*C and
equilibrium, the ice has
molecular activity within a substance. - Answer Heat content or enthalpy is a measure of the
