Millwright period 3 compressors Questions with Complete Solutions (Latest 2025) What are the 2 main categories of screw compressor - Correct Answers ✅Oil wet and oil free dry screw comp Witch rotor is the driver on a screw compressor - Correct Answers ✅The male rotor What determines the capacity of a screw compressor - Correct Answers ✅Rotor length, diameter, lobe flute design and speed What determines the discharge pressure of a screw compressor - Correct Answers ✅The location of the inlet port along the rotor, the length of path and the discharge port location What function does the oil in a wet screw compressor serve - Correct Answers ✅Remove heat, seal gaps to prevent leakage, lubricate and reduce noise What is the simplest type of control system in a screw compressor - Correct Answers ✅Online/offline control Which control system allows the compressor to produce only the amount of air required - Correct Answers ✅Modulation control 1 / 2
Millwright period 3 compressors Questions with Complete Solutions (Latest 2025) What must be included to prevent rotor contact on a dry screw compressor - Correct Answers ✅Timing gears need to be used Where are the thrust bearings located on a screw compressor
- Correct Answers ✅On the discharge side
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Air filter should be able to remove particles down to what size before air enters the compressor - Correct Answers ✅5 microns What two functions do oil separators perform - Correct Answers ✅Oil separation from air, acts as an oil reservoir What two functions do the minimum pressure valve perform - Correct Answers ✅Maintain a minimum air pressure in separator, acts as a check valve preventing flow reversal What is the function of the thermal mixing valve - Correct Answers ✅To maintain a minimum oil injection temp What is the advantage of the helical lobe blower vs the 2 lobe blower - Correct Answers ✅Increases Pr and smother air delivery