Question 1: A typical two-stage compressor would have an automated shutdown device that would be activated under the following condition: A - High intercooler temperature B - High lubricating oil level C - Low vibration D - High lube oil pressure
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Question 2:
A typical two-stage compressor would have an automated shutdown device that would be activated under the following condition:
A - Low lubricating oil temperature
B - Low intercooler temperature
C - Low suction scrubber liquid level
D - Cylinder lubricator low flow
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Question 3: A typical two-stage compressor would have an automated shutdown device that would be activated under the following condition: A - High lubricating oil level B - Low lubricating oil pressure C - Low lubricating oil temperature D - High lube oil pressure _______________________________________________
Question 4: The method of unloading a compressor by means of clearance pockets is used with: A - Axial compressors B - Rotary compressors C - Reciprocating compressors D - Centrifugal compressors _______________________________________________
Question 5: To prevent surging, the capacity of the compressor must: A - Be shut down immediately B - Not be allowed to fall below the surge limit C - Not produce a pressure equal to that in the system D - Be below the surge limit _______________________________________________
Question 6:
One method of preventing a compressor from going into surge is to: A - Open a vent to atmosphere when the compressor gets close to maximum capacity B - Throttle in the discharge valve and create a higher backpressure on the compressor C - Throttle in the suction to the compressor to prevent the pressure from becoming too high D - Recycle some of the discharge gas back to the suction when the flow becomes low _______________________________________________
Question 7: The method of controlling compressor output that is typically used with electric motors is: A - Variable speed control B - Bypass control C - Start and stop control D - Constant speed control _______________________________________________
Question 8: An axial flow compressor is more unstable than the centrifugal type, as its: A - Surge limit occurs at lower flows B - Output is controlled by flow transmitters C - Recycle valve is equipped with a positioner to minimize stroking time D - Surge limit occurs at higher flows _______________________________________________
Question 9: A pressure switch in the discharge side of a compressor is used to activate the: A - Stop/start control B - Variable speed control C - Bypass control D - Surge control _______________________________________________
Question 10: A variable speed control is used to:
A - Run the compressor driver at constant speed at all times B - Shut down the compressor when little or no air is required by the system C - Sense the pressure in the discharge side of the compressor D - Maintain the discharge pressure at a constant value _______________________________________________
Question 11: You are working in a gas plant when an alarm indicates that the capacity of the #3 compressor is about to fall below surge point. The compressor is an axial flow type. To correct this before surging begins, you: A - Open a discharge line blowoff valve to the suction side B - Close a discharge line blowoff valve to the suction side C - Open a suction line blowoff valve to the discharge side D - Close a suction line blowoff valve to the discharge side _______________________________________________
Question 12: A typical two-stage compressor is not normally equipped with a:
A - Lubricator shutdown B - Crankcase gauge glass C - Flow indicator D - Low discharge gas temperature shutdown _______________________________________________
Question 13:
A typical two-stage compressor is not normally equipped with a:
