At the same temperature for the evaporator and condenser, which refrigerant
requires the largest mass flow? ANSWER CFC-12
Which refrigerant—ANSWER CFC-12—is the first to be phased out under the
Montreal Protocol?
The theoretical discharge temperature rises as the ratio of condensing pressure
to evaporator pressure rises.
According to the Montreal Protocol, a technician is exempt from certification
requirements as long as they do not work on parts of a system that contain
refrigerant.
To find refrigerant leaks, use ANSWER. A sulfur stick on ammonia or an
electronic CFC or HCFC leak detector
ANSWER oxygen deprivation is the main cause for concern over the
concentration of CFC-12 in an engine room.
The lower explosive limit for ammonia that has been reported is ANSWER
16%.
What proportion of an ammonia vessel should be filled under normal
circumstances? ANSWER 80%
This refrigerant, even at low doses, may be identified by its smell ANSWER R-
717
At 95 degrees Fahrenheit, which refrigerant would have the lowest condensing
pressure? ANSWER CFC-11
When the type of threat and its concentration are known, it is lawful to employ a
cartridge-style gas mask for personal protection.
requires the largest mass flow? ANSWER CFC-12
Which refrigerant—ANSWER CFC-12—is the first to be phased out under the
Montreal Protocol?
The theoretical discharge temperature rises as the ratio of condensing pressure
to evaporator pressure rises.
According to the Montreal Protocol, a technician is exempt from certification
requirements as long as they do not work on parts of a system that contain
refrigerant.
To find refrigerant leaks, use ANSWER. A sulfur stick on ammonia or an
electronic CFC or HCFC leak detector
ANSWER oxygen deprivation is the main cause for concern over the
concentration of CFC-12 in an engine room.
The lower explosive limit for ammonia that has been reported is ANSWER
16%.
What proportion of an ammonia vessel should be filled under normal
circumstances? ANSWER 80%
This refrigerant, even at low doses, may be identified by its smell ANSWER R-
717
At 95 degrees Fahrenheit, which refrigerant would have the lowest condensing
pressure? ANSWER CFC-11
When the type of threat and its concentration are known, it is lawful to employ a
cartridge-style gas mask for personal protection.
