24_01_FSG_ET
Technical Engineering Quiz
Test your knowledge with our challenging Technical Engineering Quiz! Designed for students and professionals alike, this quiz covers a variety of essential topics within electrical engineering, mechanics, and battery technology.
Join us to discover:
- Fundamental concepts and calculations
- Practical applications in engineering
- Critical thinking and problem-solving skills
1. During charging you monitor the cell temperatures by tapping the BMS CAN Bus. The Temperature is transmitted as 16-bit unsigned integer (0.00229 °C/bit). Looking at the data the temperatures look somewhat implausible (see picture below) - what went wrong most likely?
The can bus is overloaded
The conversion factor is wrong
The signed-ness is wrong
This is actually the cell voltage
The endianess is wrong
2. A heat pump works with a pump of 150W and is adding heat to a hot reservoir with a rate of 1000J/s.
If that heat pump was used for cooling what would its coeffiency of cooling be?
Assume everything works ideally under perfect conditions.
A: 0.176
B: 0.15
C: 5.6667
D: 6.6667
E: 0.45
F: 0.85
3. The graph below shows a time current characteristics of Bussmann gG fuses. Electric circuit is fused by Bussmann 100NHG00B fuse (nominal current 100 A). Consider the fault loop impedance 0,8 ohm and nominal effective voltage 400 V (ideal power supply). In what time will the fuse disconnect the circuit in case the circuit shorts?
100 miliseconds
300 miliseconds
1 second
3 seconds
4.You would like to monitor the voltage of a LiPo cell by a microcontroller. The voltage of the cell is always kept
in the range of 3000...4000 mV. The microcontroller is supplied by 3.3V, the reference voltage of the 12 bit
resolution ADC converter is 3V and the ground level for the ADC is the same as the cell’s ground.
The schematic of the system can be found below. Which one is the possible range of the ADC values?
2577...3436
1260...1680
1145...1527
2835...3780
5. Your team use a LiFePO4 TS battery with 120S1P layout. The minimal, nominal and maximal cell voltage is 2.8, 3.3 and 3.65V, the cell capacity is 7.2Ah. Only the rear wheels are driven by independent motors and inverters. The custom designed inverters have 900uF capacitance each. For the discharge circuitry, only a relay and a resistor is used. What is the minimal switching power (contact rating) that the relay must be rated for?
69.1 W
68.6 W
106.5 W
137.3 W
159.0 W
6. Your team has calculated from your vehicle model simulations that the minimum required battery pack energy to finish Endurance is 6.5 kWh. Unfortunately this year regenerative braking from electric motors will not be used during Endurance. Which of the following battery packages provides enough energy to finish the Endurance and also fulfils all requirements set in rule EV 5.3.2? Note1: when calculating the total energy of the battery package use the nominal battery cell voltage. Note 2: when calculating the energy of the battery segment to verify rule EV 5.3.2 use the indicated battery cell voltage specified in the rules. Note 3: when calculating the segment mass assume all mass is caused by the battery cells.
A, 5 segments connected in series. Each segments contains 21 cells connected in series and 3 connected parallel (21s3p)
A, 8 segments connected in series. Each segments contains 15 cells connected in series and 2 connected parallel (15s2p)
B, 5 segments connected in series. Each segments contains 30 cells connected in series and 4 cells in parallel (30s4p)
B, 8 segments connected in series. Each segments contains 10 cells connected in series and 6 cells connected in parallel (10s6p)
7. At FSA 2020, three cats, Kitty (5kg), Mauzi (3kg) and Schnurli (4kg), are climbing up and down along a rope. At a certian moment Kitty descends with an acceleration of 1.6 m/s², Schnurli pulls herself up with an acceleration of 90 Gal, while Mauzi climbs up with the constant speed of 1.968 feet/s. What is the load on the rope hanger at this moment (in Newton)? (mass of the rope neglected, consider gravity g=9.08665 m/s²) round to first decimal.
Which of the following mechanical connector(s) does not comply with rule T10?
Clevis pin with a minimum yield strength of 560 MPa secured with cotter pin
Socket head screw with all-metal torque prevailing nut
Hexagon Bolt with a minimum yield strength of 560 MPa
M6 titanium lens head bolt with 17 kN minimum tensile strength
Bolt with Nordlock spring locking washer and nylon locking nut
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