Quiz Preparation

1.

2.

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

3. An EV team without driverless components have 9 parts of scrutineering to pass before being allowed to compete on track.

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

5. Which of the following is true about presenting the vehicle for static judging?

6. What is true about the Cones & Markings for Autonomous Running?

7. What is the maximum number of drivers allowed to compete at an event?

8. What is the minimum height of the characters of the car number?

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

10. What is allowed regarding telemetry during a run?

1. What is the minimum allowed ground clearance, excluding driver?

2. What is the minimum diameter of the shutdown button in the cockpit?

3. Which statement about the Ready-To-Drive sound is correct?

4. Your team completes their best manual acceleration run in 4.2 secs. The fastest team overall completed their run in 4.1 secs. How many points did your team recieve for acceleration? Round to one decimal place.

5. What is the maximum number of drivers allowed to compete at an event?

6. Your Team Sponsor offers you a Driver’s Harness. After examining the harness and the rules, an engineer in your team reports that the attachment of the harness can not be welded to the chassis structure. Furthermore, the engineer makes 4 statements. Which of these statements is true?

7. What is the minimum diameter of a shutdown button placed on the side of the vehicle behind the driver’s compartment?

8.

The following parts are part of the Shutdown Circuit (Multiple choice)

9. Which of these is/are not a penalty during autocross? (Multiple choice)

10. What is the minimum tread depth of the rain tires?

11. Your team reiceves 59.3 points for their autocross run. The fastest time overall was 71.9 secs. How long was your team’s fastest run? Round to one decimal place.

12. What is the minimum height of the university name on both sides of the car?

13. What is the volume of the smallest allowed head restraint? Give answer to two decimal places in m^3

14. What is the diameter of the inside skidpad circle?

15. Your team completes their best manual acceleration run in 5.3 secs. The fastest team overall completed their run in 3.9 secs. How many points did your team recieve for acceleration? Round to one decimal place.

16. In which currency must the costs be displayed in the CBOM?

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

18. As a DV-EV Team not competing in DC, what is your maximum total score of Busniess Plan Presentation, Cost and Manufacturing, Skid Pad, Acceleration and Efficiency together?

19. What are requirements of using a standard Impact Attenuator?

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

1. Which of the following statements about the Tractive System Accumulator are wrong? (Multiple choice)

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

3. 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.

4. A capacitor with a capacitance of 100 μF is currently charged to a voltage of 199.8V. How much additional energy is needed to charge it to a voltage of 301.4V. Give answer to 4 significant figures in Joules

5. 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

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

7. 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

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

9. Which of these HV- and LV-components have to be fire-retardant? (Multiple Choice)

10. 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)

1. The kinetic energy of a 8 lbs 4 oz box as it was dropped reaching ground is 10125J. Determine the speed as it lands. Give answer to one decimal place in m/s.

2. An air as an ideal gas expands adiabatic from a volume of V1 = 1,00l with its pressure of p1 = 10^5 Pa to 1/10 of its original pressure. What volume V2 (in litres) does the gas reach after it’s expansion? Round to two decimal places

3. Answer in MJ, round to one decimal number (example 45.7), no unit in the answer

4. Calculate delta_h1 and delta_h2 in mm (integers), seprate the value with a comma, no space in between, delta_h1 is the first value (exp.: 126,4)

5. Calculate the pull force on the plate in Newton. Round to 2 numbers seperated by a point (exanple: 9.13)

6. During last year acceleration a top speed of 100 km/h was reached. Due to big improvements 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 to the higher 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). Give answer rounded to one decimal place.

CL=3.8     CD=1.2     A=1 m²     rho=1.1 kg/m³     L1=50 mm     L2= 100 mm     H1= 125 mm     H2= 165mm

7.

8. Using an indicator, the cylinder pressure can be plotted as a curve over the piston stroke. The curve recorded for the compression stroke of an internal combustion engine can be approximated by the relationship p⋅V^n=const..
What is the amount of work done by the volume change if the following values are given?

given: V_1=10^-3 m^3; p_1=0.1 MPa; p_2=3 MPa; n=1.3

Round to one decimal number seperated by a point. Input in Joul without writing the unit in the field below (example: 152.9).

9. A vehicle with the mass 190kg, wheelbase 1,56m and tyre static radius 222mm is weighed. Scales measure 83kg (front) and 107kg (rear) when the car measured on the perfectly flat ground and the same values when the front axle is elevated by 0,85m. What is the car’s COG height? Give answer to the nearest whole number in mm

10. The previous season you could recuperate only 25% of your initially stored energy, but this season a big improvement in your drivetrain allows you to recuperate 63% of the initially stored energy.  Knowing that you had 9.6 kWh of energy in your accumulator during the last season, how much energy must your new accumulator have, if you assume, that it’s the same length and speed? Give answer in kWh to one decimal place.