MASSACHUSETTS REFRIGERATION LICENSE ACTUAL EXAM PAPER 2026 QUESTIONS WITH SOLUTIONS GRADED A+

MASSACHUSETTS REFRIGERATION LICENSE
COMPREHENSIVE TEST 2026 QUESTIONS
WITH SOLUTIONS GRADED A+

●● The temperature scale that freezes water at 0 deg. and boils water at
100 deg. is known as the __________ scale.. Answer: Centigrade


●● The definition of specific heat is _______________________.
Answer: the amount of heat required to raise 1 lb of a substance 1 deg. F.


●● The definition of sensible heat is ______. Answer: the heat that can
be measured by a thermometer.


●● The definition of latent heat is ______. Answer: the heat used which
causes a change of state


●● The definition of a BTU is ________. Answer: the amount of heat
required to raise 1 lb of water 1 deg. F


●● Heat energy is measured in _________. Answer: BTU


●● Three states of matter are _________. Answer: Solid, Liquid, and
Gas

,●● One ton of refrigeration is equal to __________. Answer: 12,000 btu
per hour


●● ____________ is the type of heat that is absorbed or extracted from a
substance when the substance changes state. Answer: Latent Heat


●● When a substance changes from a liquid to a gas, this is known as
the________________. Answer: latent heat of vaporization


●● When a substance changes from a gas to a liquid, this is known as
the________________. Answer: latent heat of condensation.


●● When a substance changes from a solid to a gas, this is known as
the________________. Answer: the latent heat of sublimation


●● In a refrigeration system, heat is absorbed by ______________.
Answer: the latent heat of vaporization in the evaporator.


●● In a refrigeration system, heat is rejected by _________. Answer: the
latent heat of condensation in the condenser.


●● Frost is. Answer: adsorbed by the evaporator

,●● The relationship of absolute pressure on the low side to the absolute
pressure on the high side is called the ___________. Answer:
compression ratio


●● ________________________________ Is called the refrigerating
effect. Answer: The amount of heat absorbed by the refrigerant used


●● Generally speaking the ____________________ is the type of
system that gives the greatest rate of heat transfer. Answer: flooded
evaporator


●● ________________ the total amount of heat present in a given
substance.. Answer: Enthalpy is


●● When hot air remains at the top of a room and cold air at the bottom
you will have an occurrence of a condition known as ___________.
Answer: stratified air.


●● The ____ State of a substance will have the highest heat content..
Answer: vapor


●● One cubic foot of air at 50 deg F can absorb _____________.
Answer: less moisture than it could at 100 deg. F.


●● A Baudelot cooler ________________. Answer: is a heat exchanger

, ●● When placed in a bucket of water, the refrigeration effect of 32 deg
F. Ice will always be ______________. Answer: 144 btu per pound.


●● ____________________________ Is called the ambient
temperature.. Answer: The temperature of the air that surrounds any
object


●● The highest temperature at which vapor can be liquified regardless of
the pressure applied is called ___________________. Answer: the
critical temperature of a substance.


●● The critical pressure of a substance is the pressure at which
____________. Answer: a liquid cannot become a vapor by adding heat.


●● The boiling point of water ______________ when salt is added.
Answer: increases


●● Heat travels in accordance with the __________________. Answer:
second law of thermodynamics.


●● One degree day is __________________________. Answer:
computed by taking the average of the highest and lowest temperatures
recorded for a given day and subtracting it from 65 deg. F