Refrigeration Final Flashcards
What is defined as “the science of producing and maintaining temperature below the surrounding atmosphere”?
refrigeration
What is the measure of the intensity of the heat of an area called?
temperature
Atmospheric pressure at seas level is what?
14.7 psia
Refrigerants in refrigeration systems ______ while changing a liquid to a gas and ______ when changing from a gas to a liquid.
A) release heat. Absorb heat
B) gain heat. Retain heat
C) discharge heat. Collect heat
D) absorb heat. Release heat
D) absorb heat. Release heat
The vapor pressure of a liquid ______ when heat is applied until boiling occurs and the liquid _____.
A) increases. Vaporizes
B) decreases. Contracts
C) condenses. Chills
D) increases. Contracts
A) increases. Vaporizes
Which law states that energy can neither be created nor destroyed, but can be converted from one type to another?
The first law of thermodynamics
Which law states that heat always travels from a warm object to a colder one?
The second law of thermodynamics
For refrigeration, specific heat is usually expressed how?
btu/Pound/°F
The latent heat required to change the state of 1 lb. Of water into ice is?
144 BTU
A condition of both pressure and temperature at which both liquid and vapor can exist in the same container simultaneously:
Saturation temperature
Identify component number one from the drawing
A) metering device
B) evaporator
C) compressor
D) condenser
E) strainer/ dryer
A) metering device
Identify component number 4 from the drawing
A) metering device
B) evaporator
C) compressor
D) condenser
E) strainer/ dryer
D) condenser
Identify component number 2 from the drawing
A) metering device
B) evaporator
C) compressor
D) condenser
E) strainer/ dryer
B) evaporator
Identify number five from the drawing:
A) high pressure side
B) low pressure side
C) high pressure liquid side
D) low pressure vapor side
C) high pressure liquid side
1 ton of refrigeration is equal to:
A) 288,000 BTU/24 hours
B) 200 BTU/ minute
C) 3.33 BTU/second
D) all of the above
E) none of the above
D) all of the above
Proper humidification______the rate of evaporation from the skin:
A) reduces
B) increases
C) has no effect on
D) kills any mildew that can appear from
A) reduces
The total heat contained in a substance, which is the sum of sensible heat and latent heat is:
heat of enthalpy
What does the abbreviation NOA stand for?
National occupational analysis
Which of the following statements is true for a NOA?
A) The NOA forms the basis for the Alberta apprenticeship training program
B) The NOA is developed by HRSDC staff from their perceptions of the trade
C) The NOA is developed by staff from the host jurisdiction
D) The NOA is the sole document used to develop a Red seal exam
D) The NOA is the sole document used to develop a red seal exam
What are the three types of questions used on a red seal exam?
Recall, application and critical thinking
Why is it important to obtain a red seal endorsement?
The red seal is the industry accepted standard for excellence in a trade
Which statement is true?
A) The noa for a specific trade should be studied to prepare for a provincial apprenticeship exam
B) in an NOA a task is bigger in scope than a block
C) industry practitioners are people that own businesses in a trade
D) industry practitioners are people that work Hands-On in a trade
D) industry practitioners are people that work Hands-On in a trade
What does the acronym PAC stand for?
Provincial apprenticeship committee
Alberta’s apprenticeship and industry training system relies on the support of____to keep its programs current and relevant:
A) PAC
B) LAC
C) Alberta apprenticeship and industry training board
D) Alberta occupational committees
E) all of the above
E) all of the above
