Quiz Preparation – UMD Racing e.V.

Quiz „Basics“

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

a. The vehicle may be presented without having passed Technical Inspection

b. The vehicle must be presented without bodywork

c. The vehicle must have passed Technical Inspection

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

a. The cones must have a minimum distance of 5 meters

b. Details of the cones used and more detailed track layout figures can be found in the Event Handbook

c. The cones and markings must be also visible at night

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3. What is BSPD short for?

a. Brake System Plausibility Device

b. Brake System Plausability Design

c. Beer Supply Performance Distinction

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4. What is the minimum height of the university name and the car number added together?

a. 200 mm

b. 150 mm

c. 50 mm

d. 250 mm

See FSG Rules 2023 T12.2.2 and T12.1.2

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

a. The maximum duration is one secound

b. Animal voices, except goat voices, are forbidden

c. It can be similar to the road noise, but must be louder

d. The used sound must be easily recognisable

See FSG Rules 2023 E4.12

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6. What is the resulting time of a SkidPad run?

a. time of the right circle plus penalties

b. average of the time of the left and the time of right circle plus penalties

c. time of the left circle plus penalties

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7. Which system is the content of CCBOM in 2026?

a. Autonomous System

b. Wheels, Wheel Bearings and Tires

c. Chassis and Body

d. Engine and Tractive System

See FSG Rules 2023 S1.4.1

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

a. The driver must pull into the driver change area for discussion with the officials

b. The track is slippery. The driver must be prepared for evasive maneuvers to avoid the situation

c. The driver must be prepared to overtake a slower car on the racing line

d. The driver must pull into the driver change area for a mechanical inspection of the vehicle

See FSG Rules 2023 D2.1.10

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9. How many different tyre sizes can be used on a car during an Autocross run?

a. 2

b. 1

c. Isn’t mentioned in the rules

d. 4

See FSG Rules 2023 T2.6.2

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

a. did not finish

b. disqualified

c. 30 secs

d. 2 secs

See FSG Rules 2023 D9.1.7

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Quiz „Electrical“

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1. For this Wheatstone Bridge based NTC temperature measurement circuit, which is the lowest voltage measurement (VAB) that is possible to obtain at 60ºC? (NTC B: 3435 +/-1%) Give answer in Volts rounded to two decimal points.

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2. The following processes have to be measured by the AMS. (Multiple choice)

a. Cell voltages when the charger is connected to the accumulator

b. Cell temperatures of 30% most thermally critical cells

c. TS current when the LVS is active

d. Cell temperatures of at least 30% of all cells distributed in at least 75% of all segments

e. TS current but only if it can be displayed during technical inspection

f. All cell voltages that are SCS

See FSG rules 2023: EV5.8.1, EV5.8.1 & EV5.8.3, EV5.8.10

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

a. NiMH type cells are allowed

b. There must be inspection holes in the side wall and the bottom of the TSAC if the wall thickness cannot be determined otherwise

c. Accumulator container attachments can be made of 1 mm thick steel

d. All electrical safety items used for working on the accumulator must be rated for 1000 VDC

e. The maximum temperature limit for LiFePo4 cells is 60°C

f. If carried out correctly, a three-point bending test is sufficient to prove adequate strength of composite material used for a TSAC if the data and photos are provided in the SES

g. The TSAC can be protected from rear impact by a square tube with an edge length of and a wall thickness of 1.2 mm

h. The ESO’s name and phone number can be displayed in characters with a height of 25 mm on the TSAC’s lid

See FSG rules 2023. Correct answers:

EV5.5.5
T 3.2.1, T 3.15, 5.5.2, Asquare tube=90.24 mm²
EV 5.5.14
IN 3.2.2 only for TS voltage

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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

W = 0.5 * C * U^2

∆W = W_end – W_start = 0.5 * C ((U_end)^2 – (U_start)^2)

5 / 10

5. 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)

series connection: L = 0.5 H + (L1*L2)/(L1 + L2) = 0.7 H
sub-in and rearrange to Solve for L2: (2L2)^2/(3L2) = 0.2 H
sub-in L2 to find L1

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6. How long will it take to discharge C1 below 60V using the following constant current sink if it is initially charged at 565V? (MOSFET’s VGSth: 4V) Give answer to two decimal places in secs.

Circuit’s current: MOSFET will operate in linear zone, close to the activation voltage. Therefore, as VGSth is 4V, VS can be taken as 8V. From these 8V and the 47R current limiting resistor, the discharge current of the circuit will be 8/47->0,17A
As the constant current discharge of a capacitor depends on capacity, as V=i·t/C->
t=V·C/i=(565-60)·0,0012/0,17=3,56s

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7. 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

a. 5 compartments in series with 4p22s configurations

b. 4 compartments in series with 6p26s configurations

c. 6 compartments in series with 4p28s configurations

d. 4 compartments in series with 4p32s configurations

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

a. Only VHDL

b. Only Verilog

c. Both

d. Neither of these

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9. How much current flows when 99 C passes down a wire in 11 s? Give answer in amps as a whole number.

Q = I * t

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10. 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

The magnetic field lines H around the straight, current-carrying wire run in concentric circles, with their centres lying on the wire axis. The field lines thus enter the wire perpendicularly in one half of the circle and leave it perpendicularly in the opposite half. This means that one semicircle of the induction loop is penetrated by the time-varying magnetic flux (t), while the opposite semicircle is penetrated by exactly the opposite flux -(t) for reasons of symmetry. The total flux at any time is zero at all times, which means that no induction voltage and thus no effective voltage Ueff is indicated at any time. The specification of the data in the task was therefore completely superfluous.

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Quiz „General Engineering“

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1. 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:

a. The attachments are positioned 220 mm apart, measured center to center, and have a thickness of 1.7 mm

b. From the driver’s shoulders rearwards to the mounting point or structural guide, the shoulder harness is 8° above the horizontal

c. The bar is bent (not straight) and the team uses an analysis method of inducing 7kN to each attachment in the horizontal plane to prove compliance

d. The steel tube has a thickness of 2 mm, and a 0.26% in carbon and 1.7% manganese content

See FSG rules 2023 T3.2

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2. 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.

Ekin = 0.5*m*v^2
W = Fr*s = μ*m*g*s
Kinetic energy of the car is completely converted by friction into heat and deformation work W. -> Ekin = W
s= v^2/2*μ*g

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A cantilever is subjected to forces

. Determine the bar force

F_{S 8}

Given F1=F4=F, F2=F3=2F, a

a. 7.27F

b. 2.85F

c. -6F

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4. A helicopter of mass 4200 kg is carrying a crate using a light extensible rope. The crate has a total mass of 800 kg, including its contents. The helicopter and crate are accelerating upwards at 2.0 ms^-2. What is the tension in the rope? Use gravititational field strength g is 9,81 N/kg. Air resistance can be ignored. Give answer to nearest whole number in Newtons

Tension = net force -> Tension = m*a (of system) + m*g (of system)

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An air stream

dot{M}_L = 5.5 kg/s,

cp_L=1 kJ/(kgK)

is to be heated in a plate heat exchanger from

θ_L′=20∘C

θ_L′′=150∘C

. For this purpose, a flue gas stream

dot{M}_R = 7.22

cp_R=1.1 kJ/(kgK)

with a temperature of

θ_R′=300∘C

is available. The overall heat transfer coefficient is

W/(m^2*K)

.
What is the required heating surface AAA if the fluid streams are arranged in counterflow?

a. 314,12 m^2

b. 281,7 m^2

c. 328,1 m^2

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6. An object is fired vertically upwards from the ground at time t = 0 s in still air at a speed of 9.6 m/s. On the way up, what is the height of the object above the ground when it has a speed of 1.9 m/s. At what time does it reach this height on the way down? Give both answers separated by a comma to one decimal place.

Possible solution:

use this formula to calculate the required height: „v^2 = u^2 + 2as“ -> 4.513m
use same formula again to calculate the maximum height the object reaches -> 4.697m
then use this formula to calculate the time the object takes to reach maximum: „v=u + at“ -> 0.785s
calculate the time taken for the object to fall from the maximum height to 4.5m (first answer): „s =1/2at^2“-> 0.194s
add together the two calculated times -> 1.0s

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7. How much current flows when 99 C passes down a wire in 11 s? Give answer in amps as a whole number.

Q = I * t

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8. A water tank under a pressure of p = 117.72 kPa has three pipes connected to it, which are sealed 5 meters below the water surface by three plates with areas A₁, A₂, and A₃.
Task:
Sort the pressures p₁, p₂, and p₃ according to their magnitude.

a. p2>p1>p3

b. p1>p2>p3

c. p2>p3>p1

d. p1=p2=p3

e. p2=p1>p3

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9. A 30 lbs model helicopter flying at 51 mph, calculate its kinetic energy. Answer in J to 3 significant figures.

KE=0,5 * m * v^2

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10. Your team is the first car at the design event during FSN2022 and it’s quite cold for this time of the year, 12 degrees C. To impress the judges, you decide to make some tea for them. What is the minimum required time to prepare the tea, knowing that you have to boil 4 tea cups of 370ml each and you have an electrical heater with a power of 500W. Give your answer to the nearest whole number in secs.

Q= m * c * Δ𝑇
P * t = Q
Sub-in equations and rearrange for t

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