MECHANICAL LAW EXAM MICHIGAN
ASSESSMENT TEST 2026 TESTED QUESTIONS
WITH FULL SOLUTION GRADED A+
◉ When transporting cylinders containing used refrigerant, DOT
requires that you Answer: attach DOT classification tags.
◉ Which compounds have the highest ozone depletion potential
(ODP)? Answer: CFCs
◉ Approved refrigerant recovery cylinders can be identified by
which color code Answer: yellow tops and gray bodies
◉ Under EPA's regulations, what standard must reclaimed
refrigerant meet before it can be resold? Answer: ARI 700
◉ The state of the refrigerant entering the compressor of a
refrigeration system is Answer: low pressure vapor
◉ Refrigerant that is cleaned using oil separation and single or
multiple passes through devices, such as; replaceable core filter
driers, which reduce moisture, acidity and particulate matter is
Answer: Recycling
, ◉ Which of the following leak detection methods is the most
effective for locating the general area of a small leak? Answer:
Electronic leak detector
◉ A compound pressure gauge for the low side of a system
measures pressure in Answer: Psig and Inches of mercury ( in. Hg)
◉ When first inspecting a hermetic system known to be leaking you
should look for Answer: Traces of oil
◉ When charging a system with nitrogen Answer: Only charge with
nitrogen vapor and use a regulator
◉ Refrigerant entering the Thermal Expansion Device of an R-22
heat pump is Answer: Saturated or sub-cooled liquid
◉ Replacement of is a repair which would always be considered a
major repair under EPAs regulations Answer: An evaporator or a
condenser
◉ At high temperature R-12 and R-22 can decompose to form
Answer: hydrochloric and hydroflouric acid or phosgene gas
ASSESSMENT TEST 2026 TESTED QUESTIONS
WITH FULL SOLUTION GRADED A+
◉ When transporting cylinders containing used refrigerant, DOT
requires that you Answer: attach DOT classification tags.
◉ Which compounds have the highest ozone depletion potential
(ODP)? Answer: CFCs
◉ Approved refrigerant recovery cylinders can be identified by
which color code Answer: yellow tops and gray bodies
◉ Under EPA's regulations, what standard must reclaimed
refrigerant meet before it can be resold? Answer: ARI 700
◉ The state of the refrigerant entering the compressor of a
refrigeration system is Answer: low pressure vapor
◉ Refrigerant that is cleaned using oil separation and single or
multiple passes through devices, such as; replaceable core filter
driers, which reduce moisture, acidity and particulate matter is
Answer: Recycling
, ◉ Which of the following leak detection methods is the most
effective for locating the general area of a small leak? Answer:
Electronic leak detector
◉ A compound pressure gauge for the low side of a system
measures pressure in Answer: Psig and Inches of mercury ( in. Hg)
◉ When first inspecting a hermetic system known to be leaking you
should look for Answer: Traces of oil
◉ When charging a system with nitrogen Answer: Only charge with
nitrogen vapor and use a regulator
◉ Refrigerant entering the Thermal Expansion Device of an R-22
heat pump is Answer: Saturated or sub-cooled liquid
◉ Replacement of is a repair which would always be considered a
major repair under EPAs regulations Answer: An evaporator or a
condenser
◉ At high temperature R-12 and R-22 can decompose to form
Answer: hydrochloric and hydroflouric acid or phosgene gas
