MECHANICAL LAW EXAM MICHIGAN
COMPREHENSIVE SCRIPT 2026 QUESTIONS
AND ANSWERS GUARANTEED TO PASS
◉ The most accurate way to measure a vacuum is with a. Answer:
micron gauge.
◉ What is the micron level to which a system should be evacuated
to? Answer: 500 microns
◉ When charging refrigerant by weight, you can charge it with
Answer: both liquid and vapor refrigerant.
◉ The sub-cooling charging method gives an indication to the
amount of Answer: refrigerant liquid at the expansion device.
◉ What is the process called when each of the refrigerants used in a
blended refrigerant leak at a different rate if released into the
atmosphere, changing the proportions of the refrigerants used in the
blend? Answer: Fractionation
, ◉ After a leak in a system using a zeotrope refrigerant is repaired
and the system has been evacuated, the system should be charged
with Answer: new refrigerant.
◉ When charging a system that uses zeotrope refrigerant, the
system should be charged with Answer: liquid refrigerant.
◉ When determining the type of burnout in a system with a
hermetic compressor, the first thing you do is Answer: check the
moisture and acid content of the system.
◉ NEMA (National Electrical Manufacturers Association) states, a
three-phased motor should operate successfully under running
conditions at the rated load when the voltage imbalance does not
exceed Answer: 1%.
◉ A metering device in a refrigeration system control that Answer:
Converts high pressure, high temperature liquid to a low pressure,
low temperature mix of liquid and vapor refrigerant.
◉ A significant difference between a DX evaporator and flooded
evaporator is Answer: In the DX evaporator, the refrigerant is
converted to vapor in the evaporator whereas it remains in liquid
form in the flooded evaporator.
COMPREHENSIVE SCRIPT 2026 QUESTIONS
AND ANSWERS GUARANTEED TO PASS
◉ The most accurate way to measure a vacuum is with a. Answer:
micron gauge.
◉ What is the micron level to which a system should be evacuated
to? Answer: 500 microns
◉ When charging refrigerant by weight, you can charge it with
Answer: both liquid and vapor refrigerant.
◉ The sub-cooling charging method gives an indication to the
amount of Answer: refrigerant liquid at the expansion device.
◉ What is the process called when each of the refrigerants used in a
blended refrigerant leak at a different rate if released into the
atmosphere, changing the proportions of the refrigerants used in the
blend? Answer: Fractionation
, ◉ After a leak in a system using a zeotrope refrigerant is repaired
and the system has been evacuated, the system should be charged
with Answer: new refrigerant.
◉ When charging a system that uses zeotrope refrigerant, the
system should be charged with Answer: liquid refrigerant.
◉ When determining the type of burnout in a system with a
hermetic compressor, the first thing you do is Answer: check the
moisture and acid content of the system.
◉ NEMA (National Electrical Manufacturers Association) states, a
three-phased motor should operate successfully under running
conditions at the rated load when the voltage imbalance does not
exceed Answer: 1%.
◉ A metering device in a refrigeration system control that Answer:
Converts high pressure, high temperature liquid to a low pressure,
low temperature mix of liquid and vapor refrigerant.
◉ A significant difference between a DX evaporator and flooded
evaporator is Answer: In the DX evaporator, the refrigerant is
converted to vapor in the evaporator whereas it remains in liquid
form in the flooded evaporator.
