Oilers/Plant Tenders (HHC) Civil Service Practice Exam

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When a compressor is used for compression of natural gas, it is a fact that _________

Only synthetic oils are recommended
Properly refined straight mineral oils are recommended
Water-based lubricants are acceptable
Any type of oil can be used

The correct answer is: Properly refined straight mineral oils are recommended

When compressing natural gas, it is widely accepted that properly refined straight mineral oils are recommended because they offer the necessary lubrication and thermal stability required for the operation of compressors in this context. These oils have properties that support efficient heat transfer and can withstand the high pressures associated with gas compression. Straight mineral oils have the right viscosity and additives to protect compressor components from wear, reduce friction, and prevent mechanical failure. They also help to maintain performance over extended operational periods, which is crucial given the continuous and demanding nature of gas compression work. Choosing the correct lubricant is vital for ensuring the longevity and reliability of the compressor, as improper lubrication could lead to increased maintenance needs, inefficient operation, and possible mechanical breakdowns. In contrast, the other options imply the use of lubricants that do not meet these stringent requirements or are unsuitable for the specific conditions present when compressing natural gas.