RETA CARO Exam Review – Refrigeration
Safety Questions and Correct Answers||
GRADED A+|| LATEST UPDATE 2026
10,000 PPM -CORRECTANSWER 1% concentration of Ammonia is equal to what in
PPM?
11.6 -CORRECTANSWER Ammonia is what on a PH scale?
100, 24 -CORRECTANSWER Fill in the blanks: More than _____ pounds released of
ammonia in _____ hours is a reportable release.
Thermal burns, dehydration burns, respiratory damage, and chemical burns. -
CORRECTANSWER What are the four primary types of injury that can occur due to
exposure to ammonia?
50 -CORRECTANSWER What is the Permissible Exposure Limit (PEL) set forth by
Federal OSHA for ammonia in PPM?
full faced air purifying respirator (APR) -CORRECTANSWER Fill in the blank: The PEL
tells an operator that they must put on a ____-_____ ___ _________ __________ if
they want to stay in that atmosphere.
, 300 -CORRECTANSWER What is the IDLH (immediately dangerous to life and health)
set forth by Federal OSHA for ammonia in PPM?
15 -CORRECTANSWER What is the LEL (lower explosive limit) for ammonia in
percentage?
150,000 -CORRECTANSWER What is the LEL (lower explosive limit) for ammonia in
PPM?
28 -CORRECTANSWER What is the UEL (upper explosive limit) for ammonia in
percentage?
280,000 -CORRECTANSWER What is the UEL (upper explosive limit) for ammonia in
PPM?
Health 3, Flammability 1, Reactivity 0 -CORRECTANSWER What is the NFPA diamond
for ammonia outdoors?
Health 3, Flammability 3, Reactivity 0 -CORRECTANSWER What is the NFPA diamond
for ammonia in an enclosed space?
Blue, red, yellow -CORRECTANSWER What colors correspond on the NFPA diamond
for ammonia to health, flammability, and reactivity?
Safety Questions and Correct Answers||
GRADED A+|| LATEST UPDATE 2026
10,000 PPM -CORRECTANSWER 1% concentration of Ammonia is equal to what in
PPM?
11.6 -CORRECTANSWER Ammonia is what on a PH scale?
100, 24 -CORRECTANSWER Fill in the blanks: More than _____ pounds released of
ammonia in _____ hours is a reportable release.
Thermal burns, dehydration burns, respiratory damage, and chemical burns. -
CORRECTANSWER What are the four primary types of injury that can occur due to
exposure to ammonia?
50 -CORRECTANSWER What is the Permissible Exposure Limit (PEL) set forth by
Federal OSHA for ammonia in PPM?
full faced air purifying respirator (APR) -CORRECTANSWER Fill in the blank: The PEL
tells an operator that they must put on a ____-_____ ___ _________ __________ if
they want to stay in that atmosphere.
, 300 -CORRECTANSWER What is the IDLH (immediately dangerous to life and health)
set forth by Federal OSHA for ammonia in PPM?
15 -CORRECTANSWER What is the LEL (lower explosive limit) for ammonia in
percentage?
150,000 -CORRECTANSWER What is the LEL (lower explosive limit) for ammonia in
PPM?
28 -CORRECTANSWER What is the UEL (upper explosive limit) for ammonia in
percentage?
280,000 -CORRECTANSWER What is the UEL (upper explosive limit) for ammonia in
PPM?
Health 3, Flammability 1, Reactivity 0 -CORRECTANSWER What is the NFPA diamond
for ammonia outdoors?
Health 3, Flammability 3, Reactivity 0 -CORRECTANSWER What is the NFPA diamond
for ammonia in an enclosed space?
Blue, red, yellow -CORRECTANSWER What colors correspond on the NFPA diamond
for ammonia to health, flammability, and reactivity?
