unit project construction organization design C.
the bursting disc safety device has a large discharge capacity and is the most widely used safety relief device now.
C.
Chapter II 1 [single choice] among the following common classification statements about tower cranes, the wrong one is ().
⑤ ① ④ ⑥ ② D.
7.
A.
The critical temperature of carbon dioxide is 31.2 ℃, which is a high-pressure liquefied gas and belongs to the first group of media.
A.
Only when the general contractor has the qualification of tower crane installation and disassembly and is constructed by the general contractor, it can be compiled by the general contractor.
class II C.
construction unit D.
class IV sliding view answer ☟☟☟ answer: B analysis: the media of pressure vessels are divided into the following two groups: the first group of media are chemical media, explosive media and liquefied gas with extreme and high toxicity.
Under certain circumstances, the safety valve and bursting disc can be used in combination to protect the safety valve from medium adhesion and corrosion.
① ② ③ ④ ⑤⑥ B.
according to the luffing mode, it can be divided into trolley luffing tower crane and boom luffing tower crane.
[single choice] special construction scheme shall be prepared before installation and disassembly of tower crane.
According to the rotation mode, it can be divided into upper rotary tower crane and lower rotary tower crane.
The simplest and most efficient learning method: textbook + courseware + question brushing, the combination of the three is indispensable.
The special construction plan shall be reviewed and approved before implementation.
supervision unit slide check answer ☟☟☟ answer: C analysis: a special construction scheme shall be prepared before the installation and disassembly of tower crane.
technical measures sliding view answer ☟☟☟ answer: B analysis: construction organization design is that the construction unit formulates the project construction procedure, construction flow direction, construction sequence, construction progress, construction method, and construction plan according to the project overview, construction period, site environment, mechanical equipment, construction machines, transformation and distribution facilities, etc.
Rome wasn’t built in a day! If you want to pass the exam, you must stick to your study, accumulate over time, and there is no shortcut! Construction safety 11 [single choice question] [2020 real question] a general construction contractor undertook the school construction project, with a total construction area of 53125 square meters, including four individual projects: teaching building, dormitory building, gymnasium and supporting ancillary facilities.
Travel limiter B.
The construction unit in option C of this question is more in line with the meaning of the question.
The bursting disc safety device is a non reclosing pressure relief device with a large discharge capacity.
before construction Construction personnel, technical measures (including quality and safety), material supply, and make plans for the layout and construction of transportation roads, equipment and facilities, hydropower and energy and other on-site facilities.
A.
Among the following statements about their use, the correct one is ().
Before the construction of the single project of the gymnasium, the general contractor shall first prepare ().
the regular inspection of the safety valve is generally at least once every two years, If it is otherwise specified in the safety technical specifications, D.
⑥ ⑤ ④ ③ ② ① C.
The safety valve is the main safety protection device of pressure vessels such as boilers.
⑤ ① ④ ⑥ ③ ② slide to check the answer ☟☟☟ answer: C analysis: installation process of tower crane: ① foundation fabrication and installation; ② Install the tower body; ③ Install jacking frame; ④ Install slewing ring; ⑤ Install TASS section and cab; ⑥ Install the spire; ⑦ Install the balance arm; ⑧ Install the boom; ⑨ Install steel wire ropes and electrical devices; ⑨ Commissioning.
The construction organization design of the unit project should be prepared before construction.
The special construction scheme shall be reviewed by the technology, safety, equipment and other departments of the unit, approved by the technical director, and approved by the supervision unit for implementation.
A.
Chemical safety 99 [single choice] in order to facilitate safety supervision, use management and inspection, pressure vessels need to be classified.
A.
Construction unit B.
101.
class III D.
torque limiter sliding check answer ☟☟☟ answer: B analysis: the main safety protection devices of tower crane include travel limiter (including lifting height limiter, rotation limiter, amplitude limiter, travel limiter), lifting weight limiter (also known as force measuring ring), torque limiter.
Class I b.
The second group of media is media other than the first group.
special construction scheme D.
the relief device should slide a certain distance from the pressure source of pressure equipment.
Check the answer ☟☟☟ answer: D analysis: Tower cranes are classified according to whether there is a walking mechanism, There are fixed and mobile types.
In the above steps, sequence according to the installation process requirements of the tower crane, and the correct one is ().
Check the answer ☟☟ answer: a analysis: B option is wrong.
safety valve C.
B.
B.
force measuring ring D.
D.
A.
The pressure is 0.5MPa and the volume is 3M ³， According to the first group of medium diagrams, it belongs to the second type of pressure vessel.
C.
The special construction scheme of tower crane shall be prepared by ().
5.
according to the jib support mode, it can be divided into tower head type and flat head type.
[single choice] safety valves and bursting discs are commonly used safety relief devices.
[single choice] the installation process of tower crane includes: ① installing the tower body; ② Install the balance arm; ③ Install the boom; ④ Install jacking frame; ⑤ Foundation fabrication and installation; ⑥ Install the slewing ring and other steps.
Now the most widely used safety relief device is a spring-loaded safety valve..
general contractor C.
It can be classified according to whether there is a walking mechanism, and there are fixed and flying modes.
3.
Temporary power use organization design B.
The single project of the gymnasium is a unit (sub unit) project in the group project.
The medium of a pressure vessel is carbon dioxide (melting point -78.5 ℃, boiling point -56.6 ℃, critical temperature 31.2 ℃), pressure 0.5MPa, volume 3M ³。 According to the classification diagram of pressure vessels (see the figure below) in the supervision regulation on safety technology of fixed pressure vessels (tsg21), the grade of this pressure vessel is ().
[single choice] the main safety protection devices of tower crane do not include ().
A.
