單項選擇題

Which of the following statements describes the relationship between viscosity and specific gravity?（）

A.Liquids with different viscosities will always have the same specific gravity
B.Liquids with different viscosities will never have the same specific gravity
C.Viscosity and specific gravity are directly proportional
D.Viscosity and specific gravity are not related in that one does not define or limit the other

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單項選擇題

Some chloronated flourocarbon refrigerants may decompose into a toxic irritating gas if it is （）.

A.stored at temperatures below 60 degrees Fahrenheit
B.charged into a system having copper fittings
C.allowed to mix with compressor oil
D.exposed to an open flame or hot surface

單項選擇題

A refrigeration system contaminated with moisture can be affected by （）.

A.acid formation
B.sludge formation
C.ice in the expansion valve
D.All of the above

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Which of the following statements describes the relationship between viscosity and specific gravity?（）

你可能感興趣的試題

Some chloronated flourocarbon refrigerants may decompose into a toxic irritating gas if it is （）.

A refrigeration system contaminated with moisture can be affected by （）.