Absorption: Level 2 Flashcards

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1
Q

Compression refrigeration systems use the mechanical energy of ________ to achieve refrigeration

A

compression

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2
Q

Absorption refrigeration systems use _____ energy to achieve refrigeration

A

heat

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3
Q

A substance that soaks up refrigerant returning from the evaporator is called a _________

A

absorbent

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4
Q

A substance that transfers heat from a conditioned space to an unconditioned space is called a ________

A

refrigerant

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5
Q

A substance that soaks up a refrigerant and lowers their combined pressure is an _________

A

absorbent

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6
Q

When a solid attracts and holds another substance on its outer surfaces, the process is called __________

A

adsorption

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7
Q

When one substance attracts and combines with another substance to form a uniform solution, the process is called ___________

A

absorption

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8
Q

Which of the following may be installed between high and low sides of an absorption system?

  1. check valves
  2. pump
  3. liquid traps
  4. all of the above
A

all of the above

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9
Q

T or F

An absorbent will absorb refrigerant when heated and released when cooled

A

false

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10
Q

T or F

In absorption chillers, the refrigerant is typically a form of sodium and the absorbent is water

A

false

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11
Q

T or F

Water may act as a refrigerant in some systems and as an absorbent in another

A

true

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12
Q

T or F

Continuous cycle absorption systems are often used in domestic refrigerators in recreational vehicles and in year-round air conditioning of both homes and large buildings

A

true

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13
Q

T or F

The capacity of air-cooled chillers varies with ambient air temperature and the temperature of the chilled water

A

True

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14
Q

T or F

An increase in the temp of the air used to cool the condenser in a residential absorption chiller will result in a decrease in the overall capacity of the system

A

true

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15
Q

T or F

A double-effect absorption chiller system uses lithium bromide as the refrigerant and water as the absorbent

A

False

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16
Q

T or F

All absorption systems use heat energy to produce the refrigeration effect

A

true

17
Q

T or F

The upper shell of a lithium bromide absorption chiller contains the generator and condenser

A

true

18
Q

T or F

Evaporative cooling systems are most effective in dry climates

A

true

19
Q

If a substance tends to absorb another, it is said to have an ________ for the other substance

A

affinity

20
Q

When an absorbent becomes saturated with the refrigerant, it is called a ______ solution

A

strong

21
Q

When a refrigerant mixture is not fully saturated, it is referred to as a _____ solution

A

weak