CFESA EXAM
What is indicated by a pressure gauge reading a vacuum when a kettle
is cold? - ANSWERS-The kettle is working fine
If an air vent continually vents steam, what is the problem? -
ANSWERS-The air vent is faulty and must be replaced
What will happen if the water jacket is overfilled? - ANSWERS-
Space needed for steam is reduced and so is the heating capacity of
the kettle
What protects the element from being dry fired in a self-contained
tilting kettle? - ANSWERS-Either a tilt switch or a low water cutoff
of some type
What protects elements from dry firing in self-contained non tilting
kettles? - ANSWERS-A low water cutoff device of some kind
What is the major enemy of steam kettles? - ANSWERS-Corrosion
What is used to protect the water jacket from corrosion? -
ANSWERS-Distilled water or rust inhibitor
,Why is proper and thorough cleaning of steam kettles so important? -
ANSWERS-If not thoroughly cleaned, the inner kettle jacket will
corrode from the acidic foods cooking in the kettle
Are boiler permits required for steam kettles in most jurisdictions? -
ANSWERS-Yes, they are pressure vessels
What controls the steam pressure in most self-contained electric
kettles? - ANSWERS-A thermostat
If a kettle is equipped with a pressure switch, what is its function? -
ANSWERS-High-pressure safety cutoff control
How can a thermostat control steam pressure? - ANSWERS-
Thermostats are able to control steam pressure due to the pressure
temperature relationship of water and steam. At every temperature
about 212 degrees there will be a corresponding pressure
What care must be given to tapered plug draw off valves? -
ANSWERS-You must be careful never to drop them or scratch them.
Apply some food grade grease to the tapered plug after every cleaning
What is meant by trunnion kettle? - ANSWERS-A tilting kettle
If trunnions are leaking, what is the probable cause? - ANSWERS-
The seals on the trunnions are worn and need to be replaced
,How can you determine the proper size relief valve for a steam kettle?
- ANSWERS-Check with the manufacturer. The proper size relief
valve can never exceed the MAWP rating on the data plate on the
kettle
What is a BTU? - ANSWERS-The amount of heat required to raise 1
pound of water 1 degree F
How many Btu does it take to raise one pound of water 1 degrees
Fahrenheit? - ANSWERS-1 Btu
What what temperature does water boil? - ANSWERS-212 degrees
If enough heat is added to a pot of water to raise the temperature of
the water to 212 degrees will the water be boiling? - ANSWERS-No,
not until latent heat is added
What is latent heat of vaporization? - ANSWERS-The additional
latent heat it takes to turn 1 lb of a substance at its boiling point, into
steam
What is the value of the latent heat of vaporization of water? -
ANSWERS-970 Btu
What is condensate? - ANSWERS-The liquid created when a
substance cools enough to give up its latent heat
, How much steam will be created when one cubic foot of water is
boiled off? - ANSWERS-1500 cubic feet
What is the boiling point of water at 10 Psi? - ANSWERS-239
degrees
What is the boiling point of water at 15 Psi? - ANSWERS-250
degrees
Why does steam cook food so quickly? - ANSWERS-Because of the
high amount of latent heat transferred when the steam condenses on
the food
What are the three characteristics foods are judged on? - ANSWERS-
Color, texture, and taste
Color change in food is directly related to what? - ANSWERS-
Temperature
At what temperature does food color begin to change? - ANSWERS-
Color begins to break down at 215 to 220 degrees F
What does cooking food at 212 degrees in an atmospheric steamer do
to food color? - ANSWERS-Enhances the color of the food
What is indicated by a pressure gauge reading a vacuum when a kettle
is cold? - ANSWERS-The kettle is working fine
If an air vent continually vents steam, what is the problem? -
ANSWERS-The air vent is faulty and must be replaced
What will happen if the water jacket is overfilled? - ANSWERS-
Space needed for steam is reduced and so is the heating capacity of
the kettle
What protects the element from being dry fired in a self-contained
tilting kettle? - ANSWERS-Either a tilt switch or a low water cutoff
of some type
What protects elements from dry firing in self-contained non tilting
kettles? - ANSWERS-A low water cutoff device of some kind
What is the major enemy of steam kettles? - ANSWERS-Corrosion
What is used to protect the water jacket from corrosion? -
ANSWERS-Distilled water or rust inhibitor
,Why is proper and thorough cleaning of steam kettles so important? -
ANSWERS-If not thoroughly cleaned, the inner kettle jacket will
corrode from the acidic foods cooking in the kettle
Are boiler permits required for steam kettles in most jurisdictions? -
ANSWERS-Yes, they are pressure vessels
What controls the steam pressure in most self-contained electric
kettles? - ANSWERS-A thermostat
If a kettle is equipped with a pressure switch, what is its function? -
ANSWERS-High-pressure safety cutoff control
How can a thermostat control steam pressure? - ANSWERS-
Thermostats are able to control steam pressure due to the pressure
temperature relationship of water and steam. At every temperature
about 212 degrees there will be a corresponding pressure
What care must be given to tapered plug draw off valves? -
ANSWERS-You must be careful never to drop them or scratch them.
Apply some food grade grease to the tapered plug after every cleaning
What is meant by trunnion kettle? - ANSWERS-A tilting kettle
If trunnions are leaking, what is the probable cause? - ANSWERS-
The seals on the trunnions are worn and need to be replaced
,How can you determine the proper size relief valve for a steam kettle?
- ANSWERS-Check with the manufacturer. The proper size relief
valve can never exceed the MAWP rating on the data plate on the
kettle
What is a BTU? - ANSWERS-The amount of heat required to raise 1
pound of water 1 degree F
How many Btu does it take to raise one pound of water 1 degrees
Fahrenheit? - ANSWERS-1 Btu
What what temperature does water boil? - ANSWERS-212 degrees
If enough heat is added to a pot of water to raise the temperature of
the water to 212 degrees will the water be boiling? - ANSWERS-No,
not until latent heat is added
What is latent heat of vaporization? - ANSWERS-The additional
latent heat it takes to turn 1 lb of a substance at its boiling point, into
steam
What is the value of the latent heat of vaporization of water? -
ANSWERS-970 Btu
What is condensate? - ANSWERS-The liquid created when a
substance cools enough to give up its latent heat
, How much steam will be created when one cubic foot of water is
boiled off? - ANSWERS-1500 cubic feet
What is the boiling point of water at 10 Psi? - ANSWERS-239
degrees
What is the boiling point of water at 15 Psi? - ANSWERS-250
degrees
Why does steam cook food so quickly? - ANSWERS-Because of the
high amount of latent heat transferred when the steam condenses on
the food
What are the three characteristics foods are judged on? - ANSWERS-
Color, texture, and taste
Color change in food is directly related to what? - ANSWERS-
Temperature
At what temperature does food color begin to change? - ANSWERS-
Color begins to break down at 215 to 220 degrees F
What does cooking food at 212 degrees in an atmospheric steamer do
to food color? - ANSWERS-Enhances the color of the food
