Lisbon Quiz 3
Lisbon Engineering Quiz
Test your knowledge on engineering principles with our Lisbon Quiz 3! This engaging quiz covers various topics related to mechanical systems, sound levels, and vehicle dynamics.
Challenge yourself with:
- Multiple-choice questions
- In-depth engineering concepts
- Practical applications in automotive and mechanical engineering
Regarding a turning process, the increase on the tool nozzle radius:
Decreases roughness.
Decreases the cutting force.
The cutting stability does not depend on the tool nozzle radius.
Its value is between 2-4mm.
A team member measures the RTDS sound level at a 10 m distance, which gives 68 dBA. The sound frequency is 200 Hz. Is the RTDS rules compliant?
Yes
No
Not enough information
Choose the most correct.
High temperature plastic deformation occurs at the material's recrystallization temperature.
High temperature plastic deformation allows a better surface roughness than low temperature.
The strength obtained at low temperature plastic deformation is higher than at high temperature.
High temperature plastic deformation requires several operations until the final part is obtained.
In a car with 4 electric motors the power at the input of each of motor must not exceed 20 kW. Assume there are no losses from the battery outlet to the motor input.
True
False
What is the power dissipated if 3.4 V is applied to an inductor at 56 ºC formed by 15 turns of 0.5 mm^2 copper wire wound around a 20 mm diameter iron core (assume that for this wire ϝ = 1.68×10❻❸ Ω.m at 25 ºC and the tempco is 0.004 K❻¹ ). Answer in mΩ to the unit.
The rise time (10% to 90%) of a given one stage low pass RC network is 3.00ms. What are possible values for R and C? (one or more)
R = 1500 Ohm and C = 950.6 nanoFarad
R = 3000 Ohm and C = 420.8 nanoFarad
R = 2000 Ohm and C = 640.0 nanoFarad
R = 2500 Ohm and C = 546.2 nanoFarad
None of the above
Late delivery of one static event's related document(s) or corresponding corrected version(s) never incur in a deduction of points greater than the points you can score on the event
True
False
A car is to make a straight of 75m. The maximum motor torque is 90 N.m, the gear ratio is 14, the car mass is 300 kg, the wheel radius is 0.3m. The maximum torque is provided by the motor until the maximum power of 80kW is reached, after that que car maintains its velocity. You don't knock down any cones, how much do your score if the best time was 4.4s.
64.88
54.88
44.88
34.88
It is allowed for the same connector to have pins connected to both the tractive system and the low voltage system.
True
False
True, but only for interlock purposes
Determine the value of damping coefficient to produce a damping ratio of 0.75, consider a corner sprung mass of 70 kg, motion ratio = 1.3 and a sprung natural frequencie of 4.8 Hz
5351,8 N/m/s
3352,5 N/m/s
4116,7 N/m/s
586,9 N/m/s
None of the above
Your team was on Endurance in dry condition. You got a flat when going off course and decided to change the whole set. Is it allowed?
Yes
No
Determine the sprung (fs) and unsprung (fu) natural frequencies of a car with corner sprung mass = 110 kg, corner unsprung mass = 20 kg, tyre vertical stifness = 200 N/mm and wheel center rate = 200 N/mm
Fs = 4.8 Hz fu = 22.5 Hz
Fs = 4.6 Hz fu = 23.5 Hz
Fs = 23,5 Hz fu = 4,7 Hz
Fs = 22.0 Hz fu = 5.5 Hz
None of the above
Typically a conter flow heat exchanger has a higher efficiency than a parallel flow one.
True
False
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