Quiz Preparation

1. What is the maximum amount of points a EV team can recieve at an event?

2.

Which of the following parts are not part of the Shutdown Circuit? (Multiple choice)

3. How many points are assigned for the BOM and BOM discussion in the Cost and Manufacturing Event?

4. Which of the following documents is directly evaluated during Engineering Design Event?

5. What is the penatly for driving off course during endurance?

6. How many percentage of points is the Cost Understanding in the Overall Cost and Manufacturing Event?

7. What is the diameter of the outside skidpad circle?

8. What does the red flag mean during the driving disciplines?

9. Which of the following requirements is a must for all types of vehicles, when moving the vehicle on the competition site?

10. What is the minimum number of points a team recieves for finishing an autocross run?

1. What does the red flag mean during the driving disciplines?

2. What does a black flag mean?

3. What is the minimum number of points a team recieves for finishing an acceleration run?

4. Your team completes their best manual acceleration run in 4.1 secs. The fastest team overall completed their run in 3.2 secs. How many points did your team recieve for acceleration? Round to one decimal place.

5. A team missed the intial deadline for a document and submitted this 24 hours after the deadline. After that the team’s document got accepted. The team will recieve a 10 point penalty.

6. How many points are assigned for the BOM and BOM discussion in the Cost and Manufacturing Event?

7.

The Electrical System Officer must: (Multiple Choice)

8. What are not the diameter of the skidpad circles? (Multiple choice)

9. What is the diameter of the outside skidpad circle?

10.

Assuming the skid pad event has only two participants, both EV without driverless. Team A and Team B: calculate the score rounded to two decimals for the team scoring the lower amount of points using the following data.

11. Can a team be eliminated from the Engineering Design Event by the judges, if every document of theirs was accepted and they are present at the Engineering Design Event?

12. Your team recieves 4.7 points for their autocross run. The fastest time overall was 69.1 secs. How long was your team’s fastest run? Round to one decimal place.

13. Each team must have two 0.8kg fire extinguishers.

14. What does the yellow and red striped flag mean during Endurance and Autocross Event?

15. How many points are assigned for the Overall Vehicle Concept in the Engineering Design Event? (Multiple choice)

16. Your team completes their best autocross run in 84.9 secs and that was the fastest overall time. How many points did your team recieve for autocross? Round to one decimal place.

17. The car is tipped to 60° during the tilt test?

18. How many sets of dry tyres are allowed to be used during one event?

19. Your team completes their best manual skidpad run in 5.1 secs but goes off course. The fastest team overall completed their run in 4.6 secs. How many points did your team recieve for skidpad? Round to one decimal place.

20. What is the penatly for driving off course during acceleration?

1. Coco, the three-legged cat with a mass of 3.5 kg, is standing still on a horizontal frictionless surface. While playing with a ball of yarn, having a mass of 0.05 kg, Coco kicks it backwards with one of her three legs so hard that the ball of yarn reaches a speed of 2.3 m/s.
The resulting speed of Coco is:

2.

The figure shows internal single walls of the TSAC and their cutouts.
Which of these walls are rules compliant? Mark all correct answers.

3. Which of the following statements regarding the rules are correct (2024)?
Mark all correct answers.

4. A single-cylinder four-stroke engine with a total displacement of 623.7 cm3 has the following theoretical design: piston stroke s = 52 mm, connecting rod length l = 66 mm, piston diameter d = 38 mm. The ignition timing point is given as Sk = 2.0 mm before TDC.
Calculate the ignition timing point in ° crankshaft before TDC. Round to one decimal.

5. In which cases will team members be denied their on-site member pass?
Mark all correct answers!

6. Your vehicle has its right-hand base coordinate frame defined with the x-axis pointing forward into the driving direction and the z-axis upwards.
A camera is positioned on the vehicle as follows, in the vehicle coordinate frame:
x = 500 mm, y = 160 mm, z = 1140 mm
and the Euler angles ZY′X′′
roll = 100°, pitch = 0°, yaw = 90°
Assume the camera has no distortion, a resolution of 1280 px × 1080 px, and the principal point (cx and cy) and the focal lengths (fx and fy) are given by:
cx = 636 px, cy = 548 px, fx = 241 px, fy = 238 px
The point (u, v)0 is defined to be (u, v)0 = (-cx, -cy) as commonly used.
Within the camera image plane, z-axis in viewing direction, an object center is detected at pixel:
u = 795 px, v = 467 px
Another sensor determines the euclidian distance of the object to the camera frame as:
d = 2.7 m
Calculate the 3D position of the object in the vehicle coordinate frame in meter. Round to three decimals. Give the solution in the following format: x, y, z, e.g. 1.234, 5.678, 9.012

7. Given is a parallel-plate capacitor with area A, separated by a uniform gap of thickness d1 filled with a dielectric with permittivity ε. At time t1, the voltage of the capacitor is V1. The capacitor is not connected to any electrical network.
How much energy is needed to change the plate spacing to d2 = 4 × d1?

8.

The figure shows a simplified quarter vehicle modal. The drive torque T(M) is the input, the wheel speed W is the output of the system. The torque due to the acceleration of the vehicle is modelled by the constant disturbance d. I models the inertia of the wheel and s is the complex variable of the Laplace transform.

Which statements are correct? Mark all correct answers.

9. The TS of an EV can be simplified to be
an ideal TS energy storage and
an unshielded TS cable running through free air.

The ideal TS energy storage consists of the following parts:
an ideal voltage source V0 supplying 600 V DC at any load
an ideal resistor Ri of 28.5 mΩ which combines all resistances in the high current path of the TS energy storage, such as the cell, contact, busbar, wiring, fuse, and outlet connector resistances
an ideal circuit-breaker as the main fuse having an appropriate DC voltage rating and a characteristic such that the instantaneous tripping current is 10 times the rated current

The TS cable has the following properties:
the cross-section A is 2×6 mm2
the length l is 10 m
the specific conductivity κ is 56 m/(Ω*mm2)
a 30 % increase in the wire’s resistance covers the thermal behavior and all other effects during a short-circuit event
Select the rated current In and breaking capability Icn of the TS energy storage circuit-breaker, such that
a short circuit event at any point of the TS wire triggers instantaneous tripping
a short circuit event at any point of the TS wire can be interrupted
the maximum possible rated current is chosen, although the value might be well above the typical continuous current rating of the cable
available values for the rated current In have a step of 10 A (e.g. 10 A, 20 A, 30 A)
the minimum possible breaking capability is chosen
available values of the breaking capability Icn have a step of 10 kA (e.g. 40 kA, 50 kA, 60 kA)
Give the rated current In in A and the breaking capability Icn in kA in the following format: In, Icn e.g. 123, 456

10.

The figure shows the output voltage Vout versus the input voltage Vin as the transfer function of 74LVC1G34, a non-inverting LVTTL buffer.
The non-inverting LVTTL buffer obeys the following static discipline:

Does the given tranfer curve satisfy the static discipline? Mark all correct answers.

1. In which cases will team members be denied their on-site member pass?
Mark all correct answers!

2. In the following there are multiple statements abount the rules. Which statements are correct?

3. According to the FS Rules and the competition handbook: Which statements are true?

4. Mark all true statements according to the FS Rules

1. A thin circular, isolated wire made of copper with radius R lies on a table with its ends
connected to a Volt meter. Another, straight wire lies exactly along a diameter of the
circular wire, connected to an alternate current source i(t) = I0 sin(wt).
The experimental setup is shown in the following Figure:

Which effective voltage Ueff does the Volt meter display?
R = 10 cm, maximum current I0 = 1 A, f = 50 Hz.
Give your answer in Volts with three decimal places

2. Three inductors are connected as shown in the following figure:

Given that L1 = 2L2, find L1 and L2 such that the equivalence inductance is L = 0.7 H.
Give your answers in Henry, rounded to three decimal places separated by a comma (L1, L2)

3. Which of the following statements about LV battery packs with lithium based chemistry other than LiFePo4 is not true?

4. 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 of horrible quality and their real capacity varies significantly leading to an unbalanced accumulator.

He performed experiements to find an approximation of the cells SoC relation to their open-circuit voltage (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? Give answer in Amps to nearest whole number

5. Your team is considering two languages, Verilog and VHDL, for programming an FPGA. Which languages could be used?

6. Your BSPD has been triggered although the driver did not touch the driving pedal. What could have gone wrong? (multiple choice)

7. Which of the following statements regarding the Brake System is false?

8. You have an electric car with these specifications:

• ten 12V batteries
• constant velocity of 80 km/h
• flat road (friction 1.2kN -> aerodynamic load included)
• load for battery 160 Ah
• efficiency of 80% (Motor)

How far can you drive with one load? Give answer to nearest whol number in km.

9. Which of the following statements is false regarding the difference between Lead-based batteries, Nickel-based batteries and Lithium-based batteries?

10. You want to drive with a Lithium Polymer Cell with 3.2 Ah and weighing 70 g. Which of the following configurations would be allowed by the rules? Hint: Unorm = 3.7 V, Umax = 4.2 V

1. Calculate the maximum possible cornering speed (in kph) for the following FSAE car when going through a 20 m radius corner.

m = 260kg; cl *A * Rho = -6 kg/m; Tyre coefficient of friction = 1.5; g = 9.81 m/s^2.

The vehicle can be treated as a point mass, driving resistances neglected. Round to 1 decimal

2. A cat of mass 12 kgs ran at 65mph. What is its kinetic energy? Answer in J to the nearest whole number

3. A racing car rolls to a stop on a horizontal course with an initial speed of v. It decelerates
only by friction with a rolling resistance of μF, which is supposed to be independent of
the current velocity.
What is the distance s the car needs to stop?
v = 300 km/h, μF = 0.15, g = 9.81 m/s2.
Give your answer in meters, rounded to four significant places.

4. If the density of aluminium is 2.71 kg/m^3, find the volume of a 0.888 kg of aluminium. Give answer in m^3 with two decimal places.

5. A racing car rolls to a stop on a horizontal course with an initial speed of v. It decelerates
only by friction with a rolling resistance of μF, which is supposed to be independent of
the current velocity.
What is the distance s the car needs to stop?
v = 230mph, μF = 0.17, g = 9.81 m/s2.
Give your answer in meters, rounded to four significant places.

6. A lorry contains an engine with a power of 0.255 W. The lorry drives for 51 s. Calculate the energy transferred in Joules and round to one decimal places.

7. A spring in a church clock has a spring constant of 10 N/m. What is its elastic potential energy store if it is stretched 8 m? Give answer in Joules to three significant figures.

8. A team is in the process of validating the compliance of the shoulder harness bar used in their car. Choose the part in which their configuration is incompliant:

9. Calculate the force Fc working at point C.

Rax = 4kN, Ray = 10 kN

Rbx =5 kN, Rby = 8 kN

10. The given gearbox consists of two gear sets with wheels 1, 2 and 3, 4 respectively. The wheels are fixed to their shafts. Calculate the drive speed (in rpm) of wheel 4?

Given: n1=600 rpm, z1=18, z2=90, z3=24, z4=120