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Plant Operations BOMA Pre-Quiz 1-100 with 100% correct answers already graded A+.docx, Exams of Oral Biology

Plant Operations BOMA Pre-Quiz 1-100 with 100% correct answers already graded A+.docx

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Download Plant Operations BOMA Pre-Quiz 1-100 with 100% correct answers already graded A+.docx and more Exams Oral Biology in PDF only on Docsity! Plant Operations BOMA Pre-Quiz 1-100 with 100% correct answers already graded A+ How may fittings be attached to a high pressure boiler? a. threaded b. certified welds c. flanges d. any of the above - answer d. any of the above Which test determines the relieving capacity of safety valves? a. hydrostatic test b. accumulation test c. orsat test d.evaporation test - answer b. accumulation test Flue gasses can leave at high temperatures. We can recover some of this heat using a(n): a. flash tank b. open feedwater heater c. economizer d. air compressor - answer c. economizer Feed water is typically heated with: a. commercial hot water heaters b.waste or extracted steam c. another burner d. superheaters - answer b.waste or extracted steam High vibrations in a feed water pump could be caused by: a. high pressure in the DA tank b. cold feed water c. hot feed water d. those things always vibrate - answer c. hot feed water Which type of pump is best for handling dirty water? a. chemical b. centrifugal c. gear d. positive displacement - answer b. centrifugal Which is not a part of a centrifugal pump? a. volute b. impeller c. piston ring d. vanes - answer c. piston ring Why have check valves on multiple feedwater pumps? a. quick start up b. efficiency c. reduce the number of valves d. prevent it from going clockwise - answer a. quick start up May dynamic displacement pumps be started with the discharge valve closed or throttled? a. true b. false - answer a. true Lubricating oil pumps are typically: a. a waste of money b. rotary c. centrifugal d. dynamic displacement - answer b. rotary Centrifugal pumps differ from reciprocating in that they are: a. positive displacement b. dynamic displacement c. steam driven d. belt driven - answer b. dynamic displacement Most codes restrict the temperature of water entering the sewer to a max of: a. 115F b. 140F c. 165F d. 212F - answer b. 140F Why do compressors have unloaders? a. decrease efficiency b. increase motor starting load c. capacity control d. all of the above - answer c. capacity control Air compressors require: a. high viscosity oil b. low sulfur oil d. rheostat - answer a. orsat analyzer When putting a cold boiler back in service, open the vent until: a. you get 25psi in the boiler b. the boiler is warm c. the steam stops are open d. never leave it open - answer a. you get 25psi in the boiler Low pressure steam boilers have maximum allowable working pressures of: a. 5 psig b. 15 psig c. 55 psig d. No MAWP - answer b. 15 psig In watertube boilers, heat and gases of combustion pass: a. through the tubes b. around the tubes c. in the tubes of the closed feedwater heater d. all of the above - answer b. around the tubes The type of boiler with the largest capacity of energy is: a. a water tube boiler b. a fire tube boiler c. either a water tube or fire tube boiler d. boilers cannot explode - answer b. a fire tube boiler The burner box of a firetube boiler could be: a. inside the boiler b. outside the boiler c. either d. neither - answer c. either On a boiler, the water column: a. measures inches of H20 b. reduces turbulence in the gauge glass c. allows the hydrostatic test d. feeds water into the boiler - answer b. reduces turbulence in the gauge glass The fitting which is most critical in stopping a boiler explosion is: a. low water cut off b. feed water control valve c. automatic cutoff d. safety valves - answer d. safety valves The _____ has water on one side and gasses of combustion on the other: a. water surface b. steam surface c. fire side d. heating surface - answer d. heating surface Which will not be found on a safety valves nameplate? a. temperature settings b. ASME stamp d. all of the above - answer d. all of the above Steam stop valves should be _____ valves: a. OS & Y gate b. OS & Y glove c. blowdown valves d. needle valves - answer a. OS & Y gate Steam lines expand and contract so we install a. expansion bends and loops b. rigid pipe hangers c. external braces d. nothing - answer a. expansion bends and loops How many tricocks are on old large boilers? a. 1 b. 2 c. 3 d. 1 for low pressure and 3 for high pressure - answer c. 3 What type of blower pushes air through the boiler? a. forced draft b. induced draft c. natural draft d. tertiary air - answer a. forced draft We install blowers to: a. increase steam pressure b. reduce thermal shock c. increase the combustion efficiency d. increase the mechanical efficiency - answer c. increase the combustion efficiency A flame scanner monitors: a. the pilot and main flame b. the pilot only c. the main flame only d. the boiler water level - answer a. the pilot and main flame A cushioned check valve is used for: a. a safety valve b. an automatic non-return valve c. a pressure relief valve d. A and C - answer b. an automatic non- return valve When a fluid is flowing through a restriction: a. pressure and speed increase b. pressure and speed decrease c. pressure increases and speed decreases d. pressure decreases and speed increases - answer d. pressure decreases and speed increases Natural draft can be increased by: a. increasing the diameter of the chimney b. increasing the height of the chimney c. decreasing the diameter of the chimney c. organic boiler treatment d. any of these chemicals - answer d. any of these chemicals mechanical treatment of boiler feedwater is: a. performed in the D.A. tank b. external treatment c. is at 220+F d. all of the above - answer a. performed in the D.A. tank Which of the following would NOT stop boiler tube corrosion? a. slightly acidic boiler water b. open feedwater heater c. proper chemical treatment d. phosphates - answer a. slightly acidic boiler water Fires that are burning liquids are class _____ fires: a. A b. B c. C d. D - answer b. B When should you take your conductivity readings? a. before blowing down b. after blowing down c. at high firing rate d. at low firing rate - answer a. before blowing down A PH of 7.2 would be: a. slightly acid b. slightly alkaline c. neutral d. very acid - answer b. slightly alkaline What is a good T.D.S. reading for a steam boiler? a. .25 ppm b. 250 ppm c. 3000 ppm d. 5000 ppm - answer d. 5000 ppm Steam pressure gauges should have a range of: a. the safety valve setting b. 1.5 to 2 times the safety valve setting c. 3 times the safety valve setting d. 110% of the MAWP - answer b. 1.5 to 2 times the safety valve setting Condensate return water should be maintained at the PH of: a. 7-8 b. 10-11 c. perfectly neutral d. 5-7 - answer a. 7-8 The dissolved solids in water can be measured by: a. a hydrostatic test b. an evaporation test d. 144 - answer c. 14.7 For control of efficient combustion, we have: a. balanced draft b. perfect combustion c. natural draft d. air-tight setting - answer d. air-tight setting The carbon dioxide level of flue gases for natural gas should be: a. 0 to 4% b. 10 to 12% c. 19.5 to 21.5% d. 24 to 28% - answer b. 10 to 12% Scale is: a. alkaline boiler water b. calcium carbonate and magnesium carbonate deposits c. gases in water d. sodium deposits which decrease boiler efficiency - answer b. calcium carbonate and magnesium carbonate deposits With broken gauge glass, the water level is checked by: a. blowing down the glass b. blowing down the water column c. using the tricocks d. never check the water level; secure the boiler during repairs - answer c. using the tricocks The lowest visible level of water in a boiler must be _____ above the top row of tubes: a. 1" b. 3" c. 6" d. 12" - answer b. 3" When is the safest time to blow down watertube boilers? a. lowest firing rate b. boiler is secured c. high firing rate d. low steaming rate - answer b. boiler is secured The biggest fuel safety factor is it's: a. fire point b. flash point c. pour point d. service factor - answer b. flash point Which two ways might we tell the water level inside a steam boiler? a. water column and gauge glass b. tricocks and gauge glass c. highwater alarm and low water alarm d. audible alarm and automatic shut down - answer b. tricocks and gauge glass Steam pressure gauges are protected from high temperature of steam by: a. welded flanges d. primary - answer b. excess Acceptable PH levels of the boiler water might be: a. 5-7 b. neutral c. 9-11 d. 12-13 - answer c. 9-11 Impurities on the surface of the water cause increase in surface tension and then: a. foaming b. carryover c. priming d. scaling - answer a. foaming THe low water alarm should be tested: a. each shift b. daily c. weekly d. monthly - answer a. each shift Heat transferred by the movement of a fluid is: a. conduction b. convection c. radiation d. sensible - answer b. convection The total heat in BTU's required to convert 10lbs of ice at 32 degrees Fahrenheit to water at 82 degrees Fahrenheit is: a. 1440 btu's b. 1940 btu's c. 2300 btu's d. 500 btu's - answer b. 1940 btu's The boiling point of water at 125 psia is ______ than the boiling point at 14.7 psia: a. higher b. lower c. is equal to 72.7 C d. is equal to 460 R - answer a. higher The heat needed to convert 1 lb. of water at 212 F to steam at 212F: a. 970.4 btu's b. 144 btu's c. 212.1 btu's d. 460.0 btu's - answer a. 970.4 btu's The point at which a vapor changes to liquid is called the: a. latent heat b. sublimation c. dew point d. specific humidity - answer c. dew point The Rankine scale starts at: a. 0 F b. 460 below freezing point of water c. 492 below freezing point of water d. 273 C - answer c. 492 below freezing point of water