MD HVAC MASTERS COMPREHENSIVE TEST
PAPER 2026 COMPLETE ANSWERS
ACCURATE
⫸ Temperature Answer: The level of heat or heat intensity, measured
with thermometers
⫸ Heat Answer: Is the motion of molecules, and travels from a warm
substance to a cold substance
⫸ Conduction Answer: Energy travelling from one molecule to another,
involves direct contact
⫸ Radiation Answer: Passes through air and heats the first solid object
it comes in contact with
⫸ Sensible Heat Answer: Heat transfer that results in the change of
temperature of a substance
⫸ Convection Answer: Used to move heat from one location to another,
and is energy travelling through a fluid from one substance to another
⫸ Latent Heat Answer: Results in the change in state of a substance, its
energy is stored when a liquid turns to gas, and released when a gas
turns to a liquid.
,⫸ Specific Heat Answer: The amount of heat necessary to raise the
temperature of 1lb of a substance 1 degree F.
⫸ Matter Answer: A substance that occupies space and has mass, and is
made up of atoms
⫸ Mass Answer: Is the property of matter that responds to gravitational
attraction.
⫸ Density Answer: Describes a substance's mass to volume relationship
⫸ Specific Gravity Answer: Is a unitless number because it is the
density of a substance divided by the density of water. Water is used as a
comparison. The density of water is 62.4 lb/ft^3 which equals 1,
anything greater than 1 will sink anything less will sink.
⫸ Specific Volume Answer: Indicates the volume that each pound of a
gas occupies,when air is heated it volume increases and whens its cooled
its volume decreases, one pound of clean dry air has a total volume of
13.33 ft^3.
⫸ Law of conservation of energy Answer: States that energy is neither
created or destroyed but can be converted from one form to another.
, ⫸ One ton of refrigeration Answer: Is the amount of heat required to
melt 1 ton of ice in a 24 hour period
⫸ Temperature/Pressure Relationship Answer: Correlates the vapor
pressure and the boiling point of water and is the basis for controlling a
system's temperature.
⫸ Refrigeration Process Answer: The boiling point of water can be
changed and controlled by controlling the vapor pressure above the
water
⫸ Superheated Answer: A liquid under pressure above its boiling point
without vaporization, is found my subtracting the evaporator outlet temp
by the evaporator saturation temp. Low superheat means overfed coil
high superheat means starved coil. should be 8-12 degrees of overall
temprature for outlet inlet should be 10-20 degrees F.
⫸ Saturated Answer: When the change of state is occurring and when
the refrigerant is at equilibrium, and both liquid and gas are present.
⫸ Subcooled Answer: Liquid cooler than the condensing saturation
temperature.
⫸ Refrigerant Answer: A substance that can be changed easily to a
vapor by boiling it and then changed to a liquid by condensing it
PAPER 2026 COMPLETE ANSWERS
ACCURATE
⫸ Temperature Answer: The level of heat or heat intensity, measured
with thermometers
⫸ Heat Answer: Is the motion of molecules, and travels from a warm
substance to a cold substance
⫸ Conduction Answer: Energy travelling from one molecule to another,
involves direct contact
⫸ Radiation Answer: Passes through air and heats the first solid object
it comes in contact with
⫸ Sensible Heat Answer: Heat transfer that results in the change of
temperature of a substance
⫸ Convection Answer: Used to move heat from one location to another,
and is energy travelling through a fluid from one substance to another
⫸ Latent Heat Answer: Results in the change in state of a substance, its
energy is stored when a liquid turns to gas, and released when a gas
turns to a liquid.
,⫸ Specific Heat Answer: The amount of heat necessary to raise the
temperature of 1lb of a substance 1 degree F.
⫸ Matter Answer: A substance that occupies space and has mass, and is
made up of atoms
⫸ Mass Answer: Is the property of matter that responds to gravitational
attraction.
⫸ Density Answer: Describes a substance's mass to volume relationship
⫸ Specific Gravity Answer: Is a unitless number because it is the
density of a substance divided by the density of water. Water is used as a
comparison. The density of water is 62.4 lb/ft^3 which equals 1,
anything greater than 1 will sink anything less will sink.
⫸ Specific Volume Answer: Indicates the volume that each pound of a
gas occupies,when air is heated it volume increases and whens its cooled
its volume decreases, one pound of clean dry air has a total volume of
13.33 ft^3.
⫸ Law of conservation of energy Answer: States that energy is neither
created or destroyed but can be converted from one form to another.
, ⫸ One ton of refrigeration Answer: Is the amount of heat required to
melt 1 ton of ice in a 24 hour period
⫸ Temperature/Pressure Relationship Answer: Correlates the vapor
pressure and the boiling point of water and is the basis for controlling a
system's temperature.
⫸ Refrigeration Process Answer: The boiling point of water can be
changed and controlled by controlling the vapor pressure above the
water
⫸ Superheated Answer: A liquid under pressure above its boiling point
without vaporization, is found my subtracting the evaporator outlet temp
by the evaporator saturation temp. Low superheat means overfed coil
high superheat means starved coil. should be 8-12 degrees of overall
temprature for outlet inlet should be 10-20 degrees F.
⫸ Saturated Answer: When the change of state is occurring and when
the refrigerant is at equilibrium, and both liquid and gas are present.
⫸ Subcooled Answer: Liquid cooler than the condensing saturation
temperature.
⫸ Refrigerant Answer: A substance that can be changed easily to a
vapor by boiling it and then changed to a liquid by condensing it
