RETA CARO COMPREHENSIVE EXAM 2026
QUESTIONS WITH SOLUTIONS GRADED A+
◉ Ton of Refrigeration. Answer: Rate BTUs transfer per unit time
288,000 BTUs/24 Hours
12,000 BTUs/12 Hours
200 BTUs/1 Minute
rate of refrigeration or cooling
◉ Pressure. Answer: Force per unit area.
◉ PSIA. Answer: Absolute pressure; measures pressure from zero
pressure
◉ PSIG. Answer: Gauge pressure, uses atmospheric pressure as the zero
point (14.7psia); 0PSIG = 14.7PSIA
◉ Temperature. Answer: Measure of the intensity of the heat energy in
an object or space
, ◉ Fahrenheit to Celsius. Answer: F=1.8(C)+32
◉ Heat. Answer: A form of energy measured in BTUs
◉ BTU. Answer: British Thermal Unit; the amount of heat required to
change the temperature of one pound of pure liquid water, one degree
Fahrenheit
◉ Heat Quantity. Answer: Quantity of heat, measured in BTUs, depends
on the mass of an object
◉ Sensible Heat. Answer: heat energy that causes a change in
temperature, can be sensed on a thermometer, does not change state
◉ Latent Heat. Answer: heat energy that causes a change in state, cannot
be measured with a thermometer
◉ Latent Heat of Fusion. Answer: heat energy moving into or out of a
solid object while a change of state is occuring (for water, latent heat of
fusion is 144 BTUS/lb). Change is either solid becoming a liquid or
liquid becoming a solid
◉ Latent Heat of Vaporization. Answer: Heat energy that moves from a
liquid into the vapor while a change of state is occurring. (liquid water
remains in a pan at a constant temperature 212F until it all evaporates)
QUESTIONS WITH SOLUTIONS GRADED A+
◉ Ton of Refrigeration. Answer: Rate BTUs transfer per unit time
288,000 BTUs/24 Hours
12,000 BTUs/12 Hours
200 BTUs/1 Minute
rate of refrigeration or cooling
◉ Pressure. Answer: Force per unit area.
◉ PSIA. Answer: Absolute pressure; measures pressure from zero
pressure
◉ PSIG. Answer: Gauge pressure, uses atmospheric pressure as the zero
point (14.7psia); 0PSIG = 14.7PSIA
◉ Temperature. Answer: Measure of the intensity of the heat energy in
an object or space
, ◉ Fahrenheit to Celsius. Answer: F=1.8(C)+32
◉ Heat. Answer: A form of energy measured in BTUs
◉ BTU. Answer: British Thermal Unit; the amount of heat required to
change the temperature of one pound of pure liquid water, one degree
Fahrenheit
◉ Heat Quantity. Answer: Quantity of heat, measured in BTUs, depends
on the mass of an object
◉ Sensible Heat. Answer: heat energy that causes a change in
temperature, can be sensed on a thermometer, does not change state
◉ Latent Heat. Answer: heat energy that causes a change in state, cannot
be measured with a thermometer
◉ Latent Heat of Fusion. Answer: heat energy moving into or out of a
solid object while a change of state is occuring (for water, latent heat of
fusion is 144 BTUS/lb). Change is either solid becoming a liquid or
liquid becoming a solid
◉ Latent Heat of Vaporization. Answer: Heat energy that moves from a
liquid into the vapor while a change of state is occurring. (liquid water
remains in a pan at a constant temperature 212F until it all evaporates)
