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高级管道工理论知识试卷(Senior plumbing theoretical knowledge test)

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2021-02-13 19:11
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2021年2月13日发(作者:型号规格)


高级管道工理论知识试卷



Senior


plumbing


theoretical


knowledge


test




Senior plumbing theoretical knowledge test



(H-2) objective test part of the answer.



Choice question



Hydraulic pipe bender is generally used for bending diameter


of not more than mm (A).



A.44.5 B. 45. 5 C. 46. 5 D. 47. Five



The bending


radius of


hot bending


bend


should


not be


less than


the outer diameter of the times (A)



A.3.5 B. 4 C. 4. 5 D. Five



The use of electric pipe bending machine, when the bending is


larger than the outer diameter of pipes (C) mm must be placed


in the tube bending mandrel.



A.80 B. 70 C. 60 D. Fifty



The


general


provisions


of


pipe


bending,


tube


wall


thinning


rate


shall not exceed (C)



A.5% B. 8% C. 15% D. 20%



When the temperature changes of the steel tube (T) less than


(B), can not be considered compensation.



A.300C B. 320C C. 340C D. 360C



The pre tension waveform expansion device, the tension


deviation not more than mm (A).



A.5 B. 10 C. 15 D. Twenty



The


waveform


expansion


device


lining


one


end


of


the


sleeve


and


the other end can be wave wall welding (C)



A. fixed B. Fixed C welding. Free mobile D. Fixed thread



In the square lifting telescopic device, tension deviation


should be less than mm (B).



A. + 5 B. + 10 C. + 15 C. + 20



There are different flow and adapt to economic flow diameter,


the diameter of the flow (A)



A. diameter B. Economic flow C. Nominal diameter



D. nominal flow



In


the


network


in


order


to


prevent


water


hammer


damage


caused,


for maximum flow rate (C)



A.0.5-0.7m/S B. 1-1. 6m/S C. 2. 5-3m/S



D.3-3.6m/S



For


gas,


hydrogen,


low


pressure


air


pipe,


the


general


pressure


gauge (B).



A. spring tube B. Diaphragm type C. Acetylene type D. Oxygen


type



The rotor flowmeter is suitable for the pressure is not more


than (B) pipeline.



A.0.098Mpa B1. 96Mpa C. 5. 88Mpa D. 6. 3Mpa



Tube


pressure


gauge


should


be


set


at


ambient


temperature


is


in


the form of U (C) within the scope of the place.



A.10-500C B. 15-600C C. 10-600C D. 20-600C



Bourdon


tube


pressure gauge


pipeline pressure


fluctuations


in


the measurement, indicating meter should be dial for maximum


scale (C)



A.2/3 B. 3/4 C. 1/2 D. 1/3



Two adjacent fixed bracket between the pipe should be in a


straight


line,


each


deviation


shall


not


be


greater


than


10m


(A)


mm.



A.5 B. 3 C. 7 D. Nine



The pipe connector shall not be placed on the hanger, and to


support the distance not less than mm (C), so as not to affect


the welding operation and maintenance.



A.90 B. 95 C. 100 D. One hundred and five



17 indoor pipe casing diameter should not be greater than the


external diameter of the pipe through the (C) mm.



A.8 B. 4 C. 6 D. Eight



18,


the


pipeline


through


the


underground


structures


or


basement


walls,


should


be


used


for


building


waterproof


casing,


vibration


or strict waterproof requirements of the pipeline through the


foundation should be set up (A)



A. flexible waterproof casing B. Waterproof casing C. Rigid


waterproof casing



D. general cement casing



19, when the medium is water, compressed air pipe flange


connection, the gasket material should be (A).



A.


rubber


plate


B.


Cloth


rubber


sheet


C.


Asbestos


board


D.


Epoxy


resin board



The top 20, the pump body is provided with a vent hole for use


(A).



A. irrigation B. Drainage C. Pressure measurement D. Flow


measurement



21, a method for water suction diameter not greater than (A)


mm pump foundation construction.



A.300 B. 400 C. 500 D600



22, the pump


shaft and the


packing


friction


is provided


at the


(C), in order to prevent the pump shaft packing wear.



A. B C flange gasket. Sleeve D. Bearing



23,


in


the


pipeline


trench


laying,


convenient


maintenance,


pipe


wall


and


ditch


and


gully


wall


distance


of


not


less


than


mm


(B),


and should set up 0. 002-0. 005 slope, slope water entrance.



A.100 B. 150 C. 200 D. Two hundred and fifty



Drainage pipe 24, contact with acid and alkali, should


generally be used as filling material interface (A).



A. asphalt rubber B. Cement powder C. Asbestos cement D.



The pipe diameter of not less than 25, the public canteens


kitchen


waste


drainage


containing


a


large


amount


of


grease


and


silt and other dry matter (B) mm, the pipe diameter not less


than 75mm.



A.95 B. 100 C. 150 D. Two hundred



26, water well water seal depth is m (A), wells should be


installed on the ventilation pipe, the bottom mud tank should


be set up.



A.0.25 B. 0. 3 C. 0. 15 D. 0. Five



27, the introduction of pipe passes through the bearing wall


and foundation should be left to the top of the pipe hole, the


upper part of the clearance of not less than m (C).



A.0.5 B. 0. 3 C. 0. 15 D. 0. One



28,


fire


water


supply


pipe


flow


rate


should


not


be


greater


than


m/S (A)



A.2.5 B. 3 C. 2 D. 3. Five



29, pipe and the heat exchanger is connected, all uses (C)


connection.



A. welding B. Wire C. Flange connection D. Glue connection



30, closed boiling water supply system according to the


calculated temperature of boiling water (D) 0C.



A.100 B. 95 C. 110 D. One hundred and five



31, the general heating system pressure is not less than (A)



A.0.02Mpa B0. 04Mpa C. 0. 06Mpa D. 0. 08Mpa



32, hot water heating system pipe from beam, column and wall


surface is not less than the parallel method (C).



A.50mm B. 80mm C. 100mm D. 120mm



By 33, high pressure steam heating system (C)



Double A. for type B. Double tube for type C, type D, a double


tube type for



34, check the pipe in Beijing costume from the bottom side of


the expansion tank (B) high, leading to


the boiler room


at the


pool.



A.50mm B. 100mm C. 200mm D. 250mm



35, the radiator assembly, should be carried out (B).



A.


pressure


test


B.


Hydraulic


test


C.


D


strength


test.


Flow


test



The


general


layout


of


the


air


compression


pipeline


36,


workshop


(A).



A. single branch type B.



Ring type C. Double branch type D. Multi branch



37, when mixed with air or oxygen acetylene, when reaching a


certain oxidation (A) in case of fire explosion.



A. volume ratio of B. When the pressure of C. When the


temperature is D. Flow



Qualified strength and tightness test of 38, after the pipe


pressure


is


needed


(C)


pipeline


working


pressure


of


compressed


air blowing into the tube of debris.



A.


is


not


greater


than


B.


Equal


to


C.


Not


less


than


D.


Not


equal


to



39,


for


the


homogeneous


fluid,


within


the


unit


volume


(A)


music


for density.



The quality of A. B. The weight of C. D gravity. severe



40,


acetylene


pipeline


and


sliding


contact


line


overhead


laying,


parallel minimum spacing is m (D).



A.0.5 B. 2 C. 0. 25 D. Three



To determine the problem



41, regardless of what kind of materials are stainless steel


pipe should be the same as the straight pipe material (V)



The


formula


for


calculating


the


total


length


of


42,


600


expected


curve bend: L= n /2 (R+r) +2L. (*)



43, hot bending, bending angle for the pipe, the heating pipe


length, bending length plus two times the length of the pipe


diameter (V)



44, flexible wall pipe than pipe wall of the rigid side along


the bolt resistance to be small. (V)



45,


the


flow


rate


under


the


condition


of


equal


by


DN50mm


in


the


pipe flow is 2 times of DN25mm tube (x)



46, the fluid velocity is in the pipeline resistance rate is


higher, the smaller resistance (x)



47, the throttle orifice is arranged on the pipeline, sharp


edges


should


be


filled


in


part


of


small


medium


moving


direction


(V)



48,


from


the


point


to


the


pressure


differential


gauge


distance


not less than 3m or greater than 50m. (V)



49, through the pipeline foundation, wall, floor, roof and


other places, should be left holes (V)



Drainage pipe 50, concealed or buried, hidden in the front to


do irrigation experiment, can not do the irrigation test (x)



Fan 51, most often the wind is centrifugal fan (x)



52, the water from the tap water factory sent along one


direction


to


form


the


user's


piping


factory,


called


the


branch


network (V)



53, the pipeline is connected with a heat exchanger, are


connected by welding (x)



Dry


pipe


54,


the


workshop


of


various


industrial


pipelines,


the


general


frame


should


be


ruined,


along


the


wall


or


pillar


laying,


installation


height


is


generally


not


less


than


2.


5m


(Chinese)



55, the fuel line also need to install the compensator, the


general use of sleeve type telescopic device (x)



56,


the


layout


of


pipeline,


and


should


be


the


main


building


and


the central line of the road parallel or vertical laying (V)



57, the heating system used open expansion water tank,


installed in the top of the system, and directly communicated


with the atmosphere. (V)



58, high pressure steam heating system is generally used for


double tube type (V)



59, no floor drain for water, but there is a displacement of


(x)



60, the length of more than 1 branch. 5m, should be set in the


middle pipe supporting hook (V)



Senior plumbing theoretical knowledge test



(H-2) the subjective part of the answer questions



Simple, calculation



According to the characteristics and scope of the heating


system, heating system which is divided into several systems?



Answer: divided into local heating system, central heating


system and heating system.



What are the common failure of hot water heating system?



Answer: there is imbalance, local radiator, expansion tank


problems, then the home position system return water


temperature is too low and the water temperature is too high


heat.



If the industrial pipeline is horizontally arranged, what is


the order of the pipeline from top to bottom?



Answer: the order is: gas pipe, tube, oxygen acetylene tube,


compressed air pipe, heat pipe, hot water pipe and drainage


pipe.



What are the characteristics of the elbow crease?



Answer: the characteristic is: the total length of the elbow


crease elbow and back wall before and after bending does not


bend, and bend in side wall due to local heating and heating


bending, creasing regularly.



Given a rope outside the park rope diameter is 2cm, allowable


stress by]=100N/cm2 [for the rope under tension for how much?



Solution: S= D2 by]=3 [pi. 14 * 22 * 100=314 (N)



44



Answer: the rope tension is 314N.



This drawing questions



Carbon steel pipe thread connection should be like?



Answer:


thread


connection,


should


be


in


the


pipe


thread


on


the


external packing, packing note shall enter the tube in order


to avoid congestion, the hand will be screwed into the pipe,


and


then


pipe


clamp


handle


once


tightened,


not


back.


The


wrench


tightened after appropriate, shall not handle with a wrench


handle growth way to tighten the screw. After the completion


of the external thread connection filler removal, re loading


and unloading shall not use the original packing material, it


should be change. The working temperature is less than 2000C


of the pipeline, the threaded joints (pressure pipe except)


sealing material should use teflon tape or sealing paste, but


may not be screwed into the tube sealing material.



That type of pipe support as shown in the picture



The graph represents the pipe support sliding support



Senior plumbing theoretical knowledge test



Part of the answer skills test (H-2)



Short answer:



First


according


to


the


different


production


methods,


which


can


be divided into several?



Answer: bend, bend, bend stamping welding.



Measuring instruments commonly used are there?



Answer: temperature, pressure, flow and level measuring


instrument.



What is the fixation effect?



Answer:


not


allowed


to


have


a


fixed


support


for


pipeline


axial


displacement,


it


not


only


bear


the


weight


of


the


pipe,


but


also


control the pipeline surface expansion and contraction


deformation.



The pipeline construction to include what?



Answer:


pipeline


construction


preparation


including


technical


preparation, material preparation and site preparation work.



What is the water system room with the line?



Answer:


the


task


is:


according


to


the


requirements


of


users


of


water, water pressure and water quality, the water from the


water


distribution


network


transport


to


the


indoor


water


point.



Calculation and drawing problems



The diagram shows the name of that



Analysis of the questions:


-


-


-


-


-


-


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