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Refrigeration > Refrigeration Protocols > Flashcards

Refrigeration Protocols Flashcards

1
Q

Which environmental issue is addressed by the Kyoto Protocol?

A

Climate Change / Global Warming / Greenhouse effect

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2
Q

Which Refrigerant from the following has the least impact on direct global warming
R134a
R404a
R717
R744

A

R717 (ammonia)

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3
Q

What is the energy efficiency ratio of a refrigeration system?

A

Refrigeration effect / compressor work done

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4
Q

What happens if the difference between condensing and evaporating temperatures decrease?

A

work done decreases and discharge temperature decreases

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5
Q

Which refrigerant types are covered by the Kyoto Protocol?

A

HFC’s / PFC’s

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6
Q

Which of the following gasses is not covered by the Kyoto Protocol?
Hydroflourocarbons
Carbon Dioxide
Methane
Hydrocarbons

A

Hydrocarbons (HC)

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7
Q

Which of the following has the highest GWP (Global warming Potential)?
R22
R134a
R290
R404a

A

R404a

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8
Q

Which of the following has the lowest GWP
R404a
R134a
R410a
R407c

A

R134a

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9
Q

Indirect global warming results from

A

Inefficient Refrigeration systems

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10
Q

Direct global warming results from

A

Refrigerant leaking into the atmosphere

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11
Q

Which of the following is classed as an Ozone Depleting Substance?
R123a
R22
R600
R744a

A

R22

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12
Q

What is the energy efficiency ratio for a heat pump system?

A

Heating Capacity / Total system input power

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13
Q

Refrigerants that are least damaging should have

A

Low GWP and Low ODP

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14
Q

Which Gas is most damaging to the atmosphere?

A

Chlorine

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15
Q

What is the Kyoto Protocol

A

An agreement between various countries to limit the emission of greenhouse gasses into the atmosphere

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16
Q

Which of the following has the lowest GWP
R134a
R407c
R1234yf
R410a

A

R1234yf

17
Q

Which international agreement is responsible for phasing out HCFC’s

A

Montreal Protocol

18
Q

Which of the following would make a refrigeration system more efficient?
Less subcooling at the expansion valve outlet
Reduce the suction superheat
More subcooling at the expansion valve inlet
Increase the condensing pressure

A

More subcooling at the expansion valve inlet

19
Q

Which of the following would result in an increase in power consumption
High thermostat set point
Low thermostat set point
Low refrigerant charge
High refrigerant boiling point

A

Low refrigerant charge

Refrigeration (6 decks)

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