Answer:e. support reinforcing bars in beams and slabs, prior to concrete placement.
Explanation: Chairs are used for construction of foundations,large steel supports,deck constructions and for underground works. Chairs can be for rebar support ( rebar support chairs),post tension chairs.
Bolsters are usually long made of metallic materials mainly used as support for construction of different infrastructures like roads it helps to ensure the concretes and other construction materials stay firmly connected. Image 1 is a metal be chair
Image 2 is a metal bolster
Answer:
A) m' = 351.49 kg/s
B) m'= 1036.91 kg/s
Explanation:
We are given;
Pressure Ratio;r_p = 12
Inlet temperature of compressor;T1 = 300 K
Inlet temperature of turbine;T3 = 1000 K
cp = 1.005 kJ/kg·K
k = 1.4
Net power output; W' = 70 MW = 70000 KW
A) Now, the formula for the mass flow rate using the total power output of the compressor and turbine is given as;
m' = W'/[cp(T3(1 - r_p^(-(k - 1)/k)) - T1(r_p^((k - 1)/k))
At, 100% efficiency, plugging in the relevant values, we have;
m' = 70000/(1.005(1000(1 - 12^(-(1.4 - 1)/1.4)) - 300(12^((1.4 - 1)/1.4)))
m' = 70000/199.1508
m' = 351.49 kg/s
B) At 85% efficiency, the formula will now be;
m' = W'/[cp(ηT3(1 - r_p^(-(k - 1)/k)) - (T1/η) (r_p^((k - 1)/k))
Where η is efficiency = 0.85
Thus;
m' = 70000/(1.005(0.85*1000(1 - 12^(-(1.4 - 1)/1.4)) - (300/0.85)(12^((1.4 - 1)/1.4)))
m' = 70000/(1.005*(432.09129 - 364.9189)
m'= 1036.91 kg/s
For question 1:
A typical sort of mishap in which a robot injures a worker. This can occur when the <u><em>robotic platform injures a worker</em></u>. These types of incidents should be avoided in the workplace. The control framework is taken to avoid these mishaps:
- When work is protective gear like helmets and safety shoes should be used.
- The robotic equipment should be kept separate from the regular working environment.
- Robots should be employed for efficiency.
- Workers are well trained in the use of safety equipment.
- This sort of disaster might occur anywhere when safety precautions are not taken.
For question 2:
The common occurrence when an incident was caused by a robotic, this example is the robot strikes the mold setter head, which can result in dangerous occurrences.
- It should be ensured that it does not happen again.
- First and foremost, the dinosaur's work must be restricted to a certain region, and the job of other employees wouldn't be in direct opposition with the robot's work.
- The robot is utilised for automation, whereas the workers are used in other tasks.
- This should also be ensured that all workers wear a helmet, safety footwear, and other safety equipment while work.
- There should be appropriate arrangements for first aid and medical facilities.
For question 3:
Once activated, the security toolkit will be able to identify the areas where adequate safety measures were not applied, and the further calculation can be defined as follows:
It will be able to trigger safety engine as well as on engineers to check into and <em><u>ensure proper safety disting to look into and guarantee the likelihood of an accident</u></em>:
- strolling on the shop floor or on a building site without personal protection equipment standing beneath the possessive object ( like those done by cranes).
- Scaffolding and ladders must be made of approved materials.
- It can activate safety engines and on-site engineers to investigate and <em><u>guarantee adequate safety distinguishment to investigate and assure the possibility of an accident:</u></em>
- strolling just on the shop floor or on a construction site while utilizing protective gear for protection sitting beneath the possessing object ( like those done by cranes).
- <em>Scaffolds and platforms</em> must be made of approved materials.
- <u>Slings, D-shackles, Bow Shackles, and Crane Hooks</u> must be examined on a regular basis by a third party since the utilized machinery at the site is just too old, welders must protect their <em><u>eyes with black glass</u></em>.
Control measures:
Begin any task with the good method statement, or what is written must be as follows:
- The risk response strategy must be followed, but high-risk occurrences must be handled with care.
- Third-party examination at regular loads, when operating on the <em><u>shop floor, aim to employ automated machinery</u></em>.
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