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#183input-rangeverified

Your head of powertrain has found a battery cell with excellent specifications and yet cheap. He decides upon a 142s2p accumulator configuration using the cells with a capacity of 5.8 Ah. The manufacturer specifies an internal impedance of 1.5 mOhm. However, after a while you notice the cells are horrible quality and their real capacity caries significantly leading to an unbalanced accumulator. He performed experiments to find an approximation of the cells SoC relation to their open-circuit volage (EMF) as shown in the following figure: Assume due to imbalance, exactly half of the accumulators cells are at 40% SoC and half at 80% SoC. What current will be drawn at the maximum allowed power usage? (answer in A) Round the voltage in the figure and the answer to the nearest decimal (e.g. 3.15V becomes 3.2V and 1.15 A becomes 1.2 A) Please use the following format: 12.3 or 1.23 (no ',' comma, no latters), round to 3 significant digits.

FSCH 2021
#184single-choiceverified

Which of following procedures is allowed at the endurance event? A: Conditions change from damp to dry: A team interrupts their first stint to changes from wet tires with a tread depth of 2.6mm to dry tires. B: Conditions change from wet to damp: A team interrupts their first stint to changes from wet tires with a tread depth of 2.2mm to dry tires. C: Conditions change from wet to dry: A team changes from wet tires with a tread depth of 2.5mm to dry tires during the driver change. D: Conditions change from dry to damp: A team changes from dry tires to wet tires with a tread depth of 2.4mm during the driver change.

FSCH 2021
#185inputverified

During last year acceleration a top speed of 100 km/h was reached. Due to big impreovement in the new drivetrain, the new vehicle reaches a top speed of 120 km/h. The aerodynamics chief has some worries about the stability of the rear wing bracing due of the highr aerodynamics load. Given the geometry below, by how much % does the bearing force in point A change in comparison to last year (The aerodynamic package did not change and therefore some values can be assumed for both vehicles). All the useful parameters are given below: cL=3.8, cD=1.2, A=1m², p=1.1kg/m³, L1=50mm, L2=100mm, H1=125mm, H2=165mm Please use the following format: 12.3 or 1.23 (no ',' comma, no latters), round to 3 significant digits.

FSCH 2021FSCH 2023FSCH 2024
#194single-choiceverified

University of the World is competing in FSN2018, so far they have completed all events they've participated in and their endurance run has already started. The entire team is very excited, but during the driver change a situation occurs. After John jumped out of the vehicle and other teammembers helped Elizabeth, the team's second driver, into the car. After she activates the tractive system one of the team members accidentally switches the tractive system master switch to OFF. John spots the mistake and quickly switches the TSMS back to ON. Is he allowed to do so?

FSN 2018