QUIZ FSG by a trio of HDPs

1. You have to perform the BSPD check during electrical inspection. Then you take all the tools to check the BSPD functionality but you forgot the voltage you need to supply to the circuit. However, you remember the configuration of your battery and the formula for the voltage output of the current sensor. What about the output voltage and the conditions? You have a 137s2p accumulator configuration with the following voltage of the cells: 3.7 V, 4 V and 4.3 V. The formula for the Vout of the current sensor is: Vout = 2.5 + Iout*0.0083.

A) The voltage will be 2.570 V and the motor must be working while pressing the brake pedal hard.

B) The voltage will be 2.576 V and the motor must be working while pressing the brake pedal hard.

C) The voltage will be 2.582 V and the motor must be working while pressing the brake pedal hard.

D) The voltage will be 2.576 V and the motor must not be working while pressing the brake pedal hard but the car must be in ready-to-race conditions.

E) The voltage will be 2.582 V and the motor must not be working while pressing the brake pedal hard but the car must be in ready-to-race conditions

F) The voltage will be 2.570 V and the motor must not be working while pressing the brake pedal hard but the car must be in ready-to-race conditions

G) None of the above is true.

2. Our driver Marc during the FSG endurance was running after a car that was way slower than him and the officials did not show the blue flag to him. As a consequence of this fact, Marc was so close to him that he could feel the slipstream effect and he was approaching him faster than he though. Then, they entered in a corner and the driver before Marc suddenly pressed the brakes and got stack on the corner forcing Marc to press the brakes in order to not crash with him. Luckily, our driver had good reflexes so he could react saving the collision stopping the car just 15 cm after the other. However, the BOTS was actuated and the shutdown circuit was opened. Abel, which is surprised by the good performance of the brake system, wants to know the time that the brakes were pressed, but the time we had registered on the data is the time between starting to press the brakes and the time the TS reach 60 VDC. Therefore, we know that the dis-charge resistance is 1000 Ohms and the capacitor has 320 uF. Consider that no other circuit can help to dis-charge the TS voltage and that the BOTS acted when the car finally stopped. In addition to this, our car when Marc started pressing the brakes was at 93.431 % of the nominal voltage (137s2p configuration with voltages of the cells between 3.7 V, 4 V and 4.3 V) and running at 70 km/h with a distance to the other car of 1.1 m when it got stack on the corner. With all this information, which is the maximum time that could have passed between the moment Marc pressed the brake pedal until the voltage of the TS was below 60 VDC? Answer in seconds with 3 decimals separated by a point.

3. Regarding the certainty or the falsehood of the following statements, which is different from the others?

A) Each team must have one team captain and 2 deputies that must be all registered 24 hours before the hour of the quiz. Only the team captain can answer the registration quiz.

B) All the master switches must include a tag out system to avoid accidental activation of them.

C) If the CRD is delivered 4 days after the deadline, the BPES 2 days after the deadline, the DSS 2 days after the deadline, the IAD 3 days after the deadline and the SES 8 days after the deadline; they will have deducted 190 points.

D) A firewall with an aluminium layer of 1 mm facing the driver is rules compliant.

E) All of them are false.

4. Our team went to INDIADA to prove the functionality of the IA. Then, they started proving a set of impacts and one of them receive the following results: Initial Length: 250 mm, velocity of impact: 8 m/s, mass of the vehicle + impact: 250 kg, IA wide: 200 mm, IA high: 100 mm, Young Modulus (E) of the IA: 80 MPa. Hence, which is the total energy absorbed by the Impact and the % of lengthening? It is rules compliant in terms of absorbed energy? NOTE: The impact deformation can be simplified as a spring deformation to make the calculations easier.

A) The energy absorbed is 8000 J and the 2.8 % of lengthening is but it is not rules compliant.

B) The energy absorbed is 7350 J and the 2.5 % of lengthening is but it is not rules compliant.

C) The energy absorbed is 8000 J and the 2 % of lengthening and it is rules compliant.

D) The energy absorbed is 8000 J and the 2.8 % of lengthening and it is rules compliant.

E) The energy absorbed is 7350 J and the 2.5 % of lengthening and it is rules compliant.

F) The energy absorbed is 8000 J and the 2 % of lengthening and it is not rules compliant.

5. Something wrong occurs while precharge and the precharge relay get stuck so it cannot disconnect the precharge circuitry. The Precharge is completed, so the second AIR gets closed, and the car enters in ready-to-drive mode. What will happen if there is a torque command and there is high current drawn from the battery? Precharge circuitry is based in a RC circuit that work when the negative AIR and the precharge relay are closed and the positive AIR is opened.

A) The Precharge relay and the resistors will probably brake because of the huge amount of power drawn from the battery as these elements are not prepared to withstand this high current.

B) The car should not be able to enter ready-to-drive mode in this conditions as the SC should have been opened at the moment this failure is detected (as the intention state of this relay is to be opened and the actual state of the relay does not correspond to that).

C) It will cause the accumulator to discharge slightly faster as some power will be burned at the Precharge resistor instead of flowing directly to the motor controller.

D) Nothing wrong happens at that moment.

7. Regarding the tire change:

A) Without considering the endurance, if the operating conditions are dry, you are allowed to drive with wet tires.

B) During the endurance, if you are with dry conditions but it changes to damp conditions, then you are allowed to change tires at driver change and this time does not count if you do not exceed from 13 minutes (driver change included).

C) In the skidpad, despite in FSG, you may not change the tires if the conditions changes to wet when at the beginning you had dry conditions.

D) During the endurance, if you have wet conditions and it changes to dry conditions, you must change tires to dry and it can be done in driver change if you do not exceed the 13 minutes including the driver change time.

E) If the conditions changes from dry to wet, you are allowed and you must change the tires at driver change within 13 minutes including the driver if you do not want to have time added.

9. Something wrong occurs activating the TS and the discharge relay does not open the discharge circuitry. The car continues activating the TS and it gets in ready-to-drive mode. What will happen if there is a torque command and there is high current drawn from the battery? Discharge circuitry is based in a RC circuit that work when the AIRs are opened and the discharge relay (SPST-NC) is closed. (SC de-activated)

A) The Discharge relay and the resistors will probably brake because of the huge amount of power drawn from the battery as these elements are not prepared to withstand this high current.

C) It will cause the accumulator to discharge slightly faster as some power will be burned at the Discharge resistor instead of flowing directly to the motor controller.

D) Nothing wrong happens at that moment.

1. Alejandro wants to measure the amount of liquid in the cooling circuit of the inverter. He has installed a linear potentiometer the moving part of which can be represented as a 2^3 cm^3 cube with a wall thickness of 1mm made of titanium (density = 4500 kg/m^3). What is de density the fluid must have if the submerged volume is half of the cube’s volume? Density air = 1.25 kg/m^3. No decimal, round to unit.

2. The volume is calculated from the variation of the resistance of the potentiometer. The total volume is 5 liter and the length is 10 cm. y=0cm equals to 0l and y=10 equals to 5l. Mr Moreu’s PCB reads the potentiometer and sends the signal to the dashboard via CAN with a dlc = 1. If Refri-man puts a fluid with half of the density of the value calculated before, which value will shown on the dashboard if the actual volume in the circuit is 55%? Answer in ml round to unit.

3. 2 accumulator container in series. Each 65s2p. Maximum cell voltage = 4.2 V. Cell voltage during test = 3.7 V. Multiple choice. True?

A) Response value is >= 273kOhm.

B) Non-programmable logic must open the shutdown circuit in less than 30 seconds if a fault resistance of less than half of the response value is applied.

C) Fault resistance for imd test equals to 136.5kOhm.

D) Fault resistance for imd test equals to 120.25kOhm.

E) Halvert <3bella, a member of ESTEIB Motrosport wanna test IMD device with a fault resistance of 0.5 Ohm but he accidentally connects the device between both TSMP’s, FIRE?

F) The fault resistance must be calculated according to the maximum voltage present at the car during the imd test.

G) No other sentences are true hahaha salu2 FSN.

QUIZ FSG by a trio of HDPs

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