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Refrigeration-City & Guilds Exam questions with accurate detailed answers

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Refrigeration-City & Guilds Exam questions with accurate detailed answers

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Refrigeration-City & Guilds Exam questions with accurate || || || || || || ||




detailed answers ||




Which group of refrigerants is covered by Regulation 2037? - ✔✔CFC's & HCFC refrigerants
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Which group of refrigerants is covered by Regulation 842? - ✔✔HFC refrigerants
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What is the EU pressure test regulation? - ✔✔EN 378
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What is the function of the compressor? - ✔✔To increase pressure and to pump the
|| || || || || || || || || || || || || || ||




refrigerant around system. || ||




On which two occasions should an external equalised valve be fitted to a refrigeration
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system? - ✔✔When the system has a large pressure drop & when the evaporator is fitted
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with a distributor.
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What does EN 378 state for a strength test? - ✔✔1.43 times the maximum pressure of the
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system for no more than 1 hour.
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What gas should not be used to pressure test a refrigeration system? - ✔✔Oxygen, it reacts
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with the oil in the system and could explode.
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Which refrigerant is kindness to the environment? - ✔✔Ammonia, which has a GWP of 0,
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(R717)



Which refrigerant group is flammable? - ✔✔Hydrocarbon (HC)
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