RETA CARO EXAM 2025
ANSWER ALL QUESTIONS IN THIS SECTION
QUESTION 1
the primary reason for concern about CFC-12 concentration in an engine room is -
ANSWERS-oxygen deprivation
QUESTION 2
the published lower explosive limit for ammonia is - ANSWERS-16%
QUESTION 3
under normal conditions an ammonia vessel should only be filled to what
percentage - ANSWERS-80%
QUESTION 4
which refrigerant can be detected by its odor even in low concentrations -
ANSWERS-R-717
END OF
PAGE 1
, RETA CARO EXAM 2025
QUESTION 5
Which refrigerant would have the lowest condensing pressure at 95 Degrees F -
ANSWERS-CFC-11
QUESTION 6
A cartridge type gas mask may legally be used for personal protection when -
ANSWERS-the type of the hazard is known and the concentration is known
QUESTION 7
a vapor can NOT be - ANSWERS-subcooled
QUESTION 8
what kind of measure is a to of refrigeration - ANSWERS-a rate of heat transfer in
BTUs per Unit of time
END OF
PAGE 2
ANSWER ALL QUESTIONS IN THIS SECTION
QUESTION 1
the primary reason for concern about CFC-12 concentration in an engine room is -
ANSWERS-oxygen deprivation
QUESTION 2
the published lower explosive limit for ammonia is - ANSWERS-16%
QUESTION 3
under normal conditions an ammonia vessel should only be filled to what
percentage - ANSWERS-80%
QUESTION 4
which refrigerant can be detected by its odor even in low concentrations -
ANSWERS-R-717
END OF
PAGE 1
, RETA CARO EXAM 2025
QUESTION 5
Which refrigerant would have the lowest condensing pressure at 95 Degrees F -
ANSWERS-CFC-11
QUESTION 6
A cartridge type gas mask may legally be used for personal protection when -
ANSWERS-the type of the hazard is known and the concentration is known
QUESTION 7
a vapor can NOT be - ANSWERS-subcooled
QUESTION 8
what kind of measure is a to of refrigeration - ANSWERS-a rate of heat transfer in
BTUs per Unit of time
END OF
PAGE 2
