Set 3 Practice Mode

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Q10247
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Which gas is universally taken as the basic reference for GWP?
Q10248
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What is the category of R 407c refrigerant?
Q10249
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What is the cylinder colour code of R 22 refrigerant?
Q10250
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Where does the ozone layer exist in atmosphere?
Q10251
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Which is the inorganic refrigerant?