Q Process Technology Equipment Ch. 7 Test A. Anti-surge B. Multistage compressor C. Axial compressor D. Centrifugal compressor E. Compressor F. Cylinder G. Deadheading H. Liquid buffered seal I. Dry carbon rings J. Dynamic compressor K. Liquid ring compressor L. Interlock M. Labyrinth seal N. Lubrication system O. Single stage compressor P. positive displacement compressor Q. Reciprocating compressor R. Rotary compressor S. Seal system T. Separator U. Surging compressor V. Inlet guide vane 1.__-recycle flow returned from the discharge of a compressor stage to a lower pressure suction; serves to prevent surging 2.__control instrumentation designed to prevent damage to the compressor by preventing it from operating at or near an undesirable pressure and by preventing flow conditions that result in surge. 3.__-a dynamic compressor that contains a rotor with contoured blades followed by a set of stationary blades (stator). In this type of compressor, the flow of gas is axial or parallel to the shaft 4.__-a dynamic compressor in which the gas flows from the inlet, located near the suction eye, to the outer tip of the impeller blades 5.__a mechanical device used to increase the pressure of a gas or vapor 6.__-a cylindrical chamber in a positive displacement compressor in which a piston compresses and then expels the gas 7.__-creating a condition in which all outlet paths from a compressor's discharge line are closed 8.__a device that promotes separation of liquids from gases 9.__an easy-to-replace, low-leakage type of seal consisting of a series of carbon rings that can be arranged with a buffer gas to prevent process gases from escaping 10.__a compressor that uses centrifugal or axial force to accelerate a gas and then to convert the velocity to pressure 11.__-a stator, located in front of the first stage of a compressor, which directs the gas into the compressor at the correct angle; also called intake guide vane 12.__a type of hardware or software that does not allow an action to occur unless certain conditions are met 13.__a shaft seal designed to restrict flow by requiring the fluid to pass through a series of ridges in an intricate path 14.__a close-fitting bushing in which oil or water are injected in order to stop the process fluid from reaching the atmosphere 15.__a rotary compressor that uses an impeller with vanes to transmit centrifugal force into a sealing fluid (eg, water), driving it against the wall of a cylindrical casing to form a compression area 16.__a system that circulates and cools sealing and lubricating oils 17.__-a device designed to compress gas multiple times by delivering the discharge from one stage to the suction of another stage 18.__-a device that uses screws, sliding vanes, lobes, gears, or pistons to deliver a set volume of gas with each stroke or rotation 19.__a positive displacement compressor that uses the inward stroke of a piston to draw (intake) gas into a chamber and then uses an outward stroke to positively displace (discharge) the gas 20.__a positive displacement compressor that uses a rotating motion to pressurize and move gas through the device 21.__-system designed to prevent process gas from leaking out of the compressor shaft, 22.__-device used to physically separate two or more components in a mixture 23.__-stage compressor-a device designed to compress gas a single time before discharging it 24.__--the intermittent flow of gas through a compressor that occurs when the discharge pressure is fluctuating, resulting in flow reversal and instability within a compressor 25._______ratio determines the maximum pressure increase that can be expected to be achieved in ea stage of compression. 26. Name three reasons why centrifugal compressors are so widely used in the process industries 27. The type of compressor that uses sliding vanes to force gases out of a chamber is classified as what kind of compressor? a. Rotary b. Centrifugal c. Axial d. Dynamic 28. Because of its design a diaphragm compressor is especially well-suited for use in what types of service? (Select all that apply.) a. Toxic gas service b. Laboratory applications c. Wastewater treatment d. Food and beverage industry 29. List three factors that need to be considered when selecting a compressor for a specific service. 30. A lubrication system in a compressor: a.provides circulation and cooling of sealing and lubrication oils b. minimizes total leakage c. increases the pressure on process gases d. transfers heat to the seals 31. Surging can cause (select all that apply): a. seal oil contamination b. vibration c. destruction of the machinery d. deadheading conditions 32. (True or False) Interlock systems are used to bypass emergency shutdown systems in order to keep production running so a particular unit can meet its production goals. 33. (True or False) Compressors move liquids, and pumps move gases. 34. (True or False) A dynamic compressor might stall when it is backed up to its surge point on the compressor's performance curve. 35. What type of seal system is designed to restrict flow by requiring the fluid to pass through a series of ridges in an intricate path? a. Lubrication b. Labyrinth seal c. Liquid buffered seal d. Dry carbon rings 36. List three personal safety hazards associated with compressors. 37. Which of the following is an equipment hazard associated with compressors? (Select all that apply.) a. Discharge of harmful gas into the air b. Chemical exposure c. High voltage electricity d. Inadequate lubrication 38. List four things a process technician can do to monitor compressor equipment and guard against hazards. PreviousNext