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#139single-choiceverified

Your Team has build a steering system using a CFRP steering column. It is bonded to the steering rack pinion shaft. During scrutineering you get told that a bonded connection is not allowed (T 2.6.10). In order to create the necessary mechanical connection you decide to add a shoulder bolt going through the necessary diameter of the shoulder bolt? Consider only one bolt and a required safety factor of 1.5 or higher. Allowed average contact pressure for the CFRP column is p_max=60MPa. Your steering column comes with an outer diameter of 25mm and an inner diameter of 20mm. The steering system is designed for a torque of 20Nm. Use the simplification of projected area for average contact pressure calcualtion p=F/(d*t) F:Force d:diameter of shoulder Bolt t:material thickness

FSA 2021FSA 2021
#143single-choiceverified

The car of an FSA technical inspector stays away from balconies but has lost a leg in a terrible racing accident. The simplified mechanical model of the cat consists of a solid body (B_1) that represents the head, torso and legs. The body B_1 has the mass m and the dimensions that can be taken from the sketch (top view of the cat). The 3 legs are assumed to be vertical bars. The cat's tail is modeled as a beam B_2 with the line load q. This is connected at the height of the center of gravity with B_1 and can be privoted in the horizontal plane. x_1 in mm: 100 x_2 in mm: 250 x_3 in mm: 275 w in mm: 125 I_t in mm: 400 m in kg: 2 q in kg/m: 0.5 alpha in deg: 30 The cat moves its tail by the angle alpha to the right. Which of the following statements is true?

FSA 2021FSA 2021
#151inputverified

Your current race car burns 4 liters of RON100 gasoline in your IC engine during an endurance race. By what amount [kg] you may lower your fossil carbon dioxide emissions by using a E85 mixture (per volume) as biofuel? Assume complete combustion and the same amount of chemical energy needed to run your engine on E85 fuel during an endurance. Consider the properties below. round to 2 decimal places and number format be like "3.14". Please use the following format: 12.34

FSA 2021