HVAC Contractor Final Exam Review 2025-
2026 Actual Questions And Answers Graded
A+
A system with a 120 degree saturation temperature in the condenser with R-22 has
a liquid line temperature of 105 degrees. what does the temperature difference of
15 degrees represent?
a. superheat
b. wet bulb
c. subcooling
d. air temperature difference
subcooling
When a technician uses a nitrogen cylinder to pressurize a system for leak
detection what should be used for safety
a. hand valve
b. impervious gloves
c. pressure regulator
d. temperature gauge
pressure regulator
,When the azeotropic blend of refrigerant condenses or evaporates at a different
temperature, it is called?
a. fractionation
b. segregation
c. purification
d. latent heat of fusion
fractionation
before brazing copper tubing what should be circulated through the tubing first
a. CO
b. refrigerant
c. oil
d nitrogen
nitrogen
a service technician should adjust the superheat setting on a TXV how often
,a. never
b. when absolutely necessary
c. once a month
d. routinely
when absolutely necessary
refer to house 1drawing. calculate the net summer heat gain through the east
exterior wall of bedroom 1. select the closest answer
a. 115 btuh
b. 338 btuh
c. 326 btuh
d. 1234 btuh
115 btuh
gas fitting installed in concealed locations shall be limited to which of the
following
a. threaded elbows
b. tees
c. couplings
, d. all of the above
all of the above
recovered refrigerant may only be reused under what condition
a. when it has been purified to meet ARI 700 standards
b. when it is used in the equipment is was removed from
c. when it is recycled
d. never
when is it used in the equipment is was removed from
any person who performs maintenance, service or repair that could reasonably be
expected to release class 1 or class 11 refrigerants to the atmosphere would be
considered what
a. maintenance personnel
b. technician
c. business owner
d. contractor
technician
2026 Actual Questions And Answers Graded
A+
A system with a 120 degree saturation temperature in the condenser with R-22 has
a liquid line temperature of 105 degrees. what does the temperature difference of
15 degrees represent?
a. superheat
b. wet bulb
c. subcooling
d. air temperature difference
subcooling
When a technician uses a nitrogen cylinder to pressurize a system for leak
detection what should be used for safety
a. hand valve
b. impervious gloves
c. pressure regulator
d. temperature gauge
pressure regulator
,When the azeotropic blend of refrigerant condenses or evaporates at a different
temperature, it is called?
a. fractionation
b. segregation
c. purification
d. latent heat of fusion
fractionation
before brazing copper tubing what should be circulated through the tubing first
a. CO
b. refrigerant
c. oil
d nitrogen
nitrogen
a service technician should adjust the superheat setting on a TXV how often
,a. never
b. when absolutely necessary
c. once a month
d. routinely
when absolutely necessary
refer to house 1drawing. calculate the net summer heat gain through the east
exterior wall of bedroom 1. select the closest answer
a. 115 btuh
b. 338 btuh
c. 326 btuh
d. 1234 btuh
115 btuh
gas fitting installed in concealed locations shall be limited to which of the
following
a. threaded elbows
b. tees
c. couplings
, d. all of the above
all of the above
recovered refrigerant may only be reused under what condition
a. when it has been purified to meet ARI 700 standards
b. when it is used in the equipment is was removed from
c. when it is recycled
d. never
when is it used in the equipment is was removed from
any person who performs maintenance, service or repair that could reasonably be
expected to release class 1 or class 11 refrigerants to the atmosphere would be
considered what
a. maintenance personnel
b. technician
c. business owner
d. contractor
technician
