After the investigation of the causes of the accident, the National Transportation Safety Board concluded that the reason consisted in the improper controlling of the engines’ serviceability. Although, the plane underwent a regular checking by professional mechanists, engineers did not notice any damages during the engine changes in Tulsa, Therefore, we can say that the ignoring of the standard regulating procedure, regulated by the aviation law standards, caused the plane crash. The reason of the ignoring of the air law regulations consisted in the inability to identify and prevent the usage of improper maintenance procedures, Thus, a lack of attention of engineers and a complicated construction of the plane prevented the normal controlling and resulted in the neglecting of the aviation laws and rules.

Which of the following are true statements?

a) The complicated construction of the plane led to the accident.
b) Additional reason for the accident may be the ignoring of standard regulations.
c) The core reason for the accident was the improper controlling of the engines. serviceability.
d) The engineers did not notice the damage because they were careless.

The engineers decided to change the state of suspension uprights in two phases. The first one was connected with the alteration of the upright It was changed to the forged steel from an aluminium extrusion. The second phase was connected with further development and designing the great number of other components, According to the first phase, new forged uprights were elaborate with the process which comprises design and analysis functions. “The geometric hard points (mounting points) of the suspension were linked together within the package envelope for the suspension corner assembly (wishbones, wheel, brake disc and calliper)”. Intact, these new uprights were made with the help of CATIA software, where the main output was a solid model. In fact, this model had to undergo further analysis, which was based on durability requirements of the vehicle. The analysis showed that new forged steel was better than the previous upright. Firstly, new uprights met all functional requirements or even exceeded them. Secondly, they improve the state of stiffness and durability doubled it.

Which of the following are true statements?

a) The analysis showed that new forged steel was worse than the previous upright.
b) There was an elaboration between new forged uprights and the process that comprises design and analysis functions.
c) The first change was made with the alteration of the upright.
d) The second phase was connected with designing additional details.