RETA CARO EXAM REVIEW SET
QUESTIONS AND ANSWERS
10,000 PPM - ANSWERS1% concentration of Ammonia is equal to what in PPM?
11.6 - ANSWERSAmmonia is what on a PH scale?
100, 24 - ANSWERSFill in the blanks: More than _____ pounds released of ammonia in
_____ hours is a reportable release.
Thermal burns, dehydration burns, respiratory damage, and chemical burns. -
ANSWERSWhat are the four primary types of injury that can occur due to exposure to
ammonia?
50 - ANSWERSWhat is the Permissible Exposure Limit (PEL) set forth by Federal
OSHA for ammonia in PPM?
full faced air purifying respirator (APR) - ANSWERSFill in the blank: The PEL tells an
operator that they must put on a ____-_____ ___ _________ __________ if they want
to stay in that atmosphere.
300 - ANSWERSWhat is the IDLH (immediately dangerous to life and health) set forth
by Federal OSHA for ammonia in PPM?
15 - ANSWERSWhat is the LEL (lower explosive limit) for ammonia in percentage?
150,000 - ANSWERSWhat is the LEL (lower explosive limit) for ammonia in PPM?
28 - ANSWERSWhat is the UEL (upper explosive limit) for ammonia in percentage?
280,000 - ANSWERSWhat is the UEL (upper explosive limit) for ammonia in PPM?
Health 3, Flammability 1, Reactivity 0 - ANSWERSWhat is the NFPA diamond for
ammonia outdoors?
Health 3, Flammability 3, Reactivity 0 - ANSWERSWhat is the NFPA diamond for
ammonia in an enclosed space?
Blue, red, yellow - ANSWERSWhat colors correspond on the NFPA diamond for
ammonia to health, flammability, and reactivity?
No - ANSWERSCan an operator wear contact lenses at work?
, Hydrostatic expansion - ANSWERSFill in the blank: When liquid ammonia is trapped in
a vessel or pipe that is completely full, a temperature rise can cause an effect called
___________ _________.
Sulfur stick and pH or litmus paper - ANSWERSWhat are the two primary ways of
finding small ammonia leaks?
15 - ANSWERSFill in the blank: An operator must flush the body or eyes for a minimum
of __ minutes when exposed to ammonia.
heat transfer in BTUs per time - ANSWERSWhat is tonnage?
PSIA - ANSWERSWhat pressure scale must be used to calculate a compression ratio?
3 groups (CFCs, HCFCs, HFCs) - ANSWERSHow many groups of halocarbons are
there?
Carbon - ANSWERSFill in the blank: Organic compounds are structured around the
______ molecule.
Inorganic - ANSWERSFill in the blank: ________ compounds are usually non carbon
based.
True - ANSWERSTrue or False: Inorganic/organic compounds fall under the natural
group and usually are classified with the refrigerant series 700.
400, 2 - ANSWERSZeotropic refrigerants are the ___ series refrigerants that are a
blend of more than _ refrigerants.
500 - ANSWERSAzeotropic refrigerants are the ___ series refrigerants that are a blend
of usually 2 refrigerants.
Isobutene, propane, ethane - ANSWERSFill in the blank: _________, _______ and
______ are also considered natural refrigerants but are classified under hydrocarbon
refrigerants and are considered extremely flammable.
King valve - ANSWERSThe type of valve that is considered a critical isolation valve.
Regulator valve - ANSWERSThe type of valve that automatically cuts off the movement
of a gas or liquid at a certain pressure.
Solenoid valve - ANSWERSThe type of valve that is a quick acting electrical valve that
is either normally open or normally closed and allows systems to be automated.
QUESTIONS AND ANSWERS
10,000 PPM - ANSWERS1% concentration of Ammonia is equal to what in PPM?
11.6 - ANSWERSAmmonia is what on a PH scale?
100, 24 - ANSWERSFill in the blanks: More than _____ pounds released of ammonia in
_____ hours is a reportable release.
Thermal burns, dehydration burns, respiratory damage, and chemical burns. -
ANSWERSWhat are the four primary types of injury that can occur due to exposure to
ammonia?
50 - ANSWERSWhat is the Permissible Exposure Limit (PEL) set forth by Federal
OSHA for ammonia in PPM?
full faced air purifying respirator (APR) - ANSWERSFill in the blank: The PEL tells an
operator that they must put on a ____-_____ ___ _________ __________ if they want
to stay in that atmosphere.
300 - ANSWERSWhat is the IDLH (immediately dangerous to life and health) set forth
by Federal OSHA for ammonia in PPM?
15 - ANSWERSWhat is the LEL (lower explosive limit) for ammonia in percentage?
150,000 - ANSWERSWhat is the LEL (lower explosive limit) for ammonia in PPM?
28 - ANSWERSWhat is the UEL (upper explosive limit) for ammonia in percentage?
280,000 - ANSWERSWhat is the UEL (upper explosive limit) for ammonia in PPM?
Health 3, Flammability 1, Reactivity 0 - ANSWERSWhat is the NFPA diamond for
ammonia outdoors?
Health 3, Flammability 3, Reactivity 0 - ANSWERSWhat is the NFPA diamond for
ammonia in an enclosed space?
Blue, red, yellow - ANSWERSWhat colors correspond on the NFPA diamond for
ammonia to health, flammability, and reactivity?
No - ANSWERSCan an operator wear contact lenses at work?
, Hydrostatic expansion - ANSWERSFill in the blank: When liquid ammonia is trapped in
a vessel or pipe that is completely full, a temperature rise can cause an effect called
___________ _________.
Sulfur stick and pH or litmus paper - ANSWERSWhat are the two primary ways of
finding small ammonia leaks?
15 - ANSWERSFill in the blank: An operator must flush the body or eyes for a minimum
of __ minutes when exposed to ammonia.
heat transfer in BTUs per time - ANSWERSWhat is tonnage?
PSIA - ANSWERSWhat pressure scale must be used to calculate a compression ratio?
3 groups (CFCs, HCFCs, HFCs) - ANSWERSHow many groups of halocarbons are
there?
Carbon - ANSWERSFill in the blank: Organic compounds are structured around the
______ molecule.
Inorganic - ANSWERSFill in the blank: ________ compounds are usually non carbon
based.
True - ANSWERSTrue or False: Inorganic/organic compounds fall under the natural
group and usually are classified with the refrigerant series 700.
400, 2 - ANSWERSZeotropic refrigerants are the ___ series refrigerants that are a
blend of more than _ refrigerants.
500 - ANSWERSAzeotropic refrigerants are the ___ series refrigerants that are a blend
of usually 2 refrigerants.
Isobutene, propane, ethane - ANSWERSFill in the blank: _________, _______ and
______ are also considered natural refrigerants but are classified under hydrocarbon
refrigerants and are considered extremely flammable.
King valve - ANSWERSThe type of valve that is considered a critical isolation valve.
Regulator valve - ANSWERSThe type of valve that automatically cuts off the movement
of a gas or liquid at a certain pressure.
Solenoid valve - ANSWERSThe type of valve that is a quick acting electrical valve that
is either normally open or normally closed and allows systems to be automated.
