Lisbon Quiz 1

The system described by the transfer function G(s) = (s+1) / [s(s+2)] is:

A new sports car has a drag coefficient of 0.29 and a frontal area of 7 m2, and is traveling at 170 km/h. How much power, in kW, is required to overcome aerodynamic drag if r=1.3 kg/m3?

A torsional torque of 3kN.m is applied to a circular shaft with D=60mm and L=200mm. What is the maximum shear stress?

Which of the following welding technique(s) use an electrode covered with flux?

What is the maximum size of a CAN 2.0a base data frame with DLC = 5?

Consider a circuit whose power as function of time is given by: P(t)=50sen(500t)+20. Compute the effective value of the reactive power rounded to centesimals.

Consider a rod with initial diameter of 15 mm. When a force is applied, the rod has a normal stress of 0.1GPa resulting in a variation of diameter of -0.002mm. Knowing that E=200GPa, calculate the Poisson Ratio of the material, rounded to the nearest thousandth

In a car's front suspension, if the percentage of anti-dive is increased, the amount of longitudinal load transfer will:

For 300V TS. If TS and LVS are present in the same enclosure and there is no adequate isolator between them, what is the minimum distance they must be spaced?

Consider a magnetic core whose volume is 0.0035 m^3. By applying a certain voltage to the coils, the induction field B in the core increased from 0 to 1.6T. Consider that H is a function of B such that H(B)=63.6exp(1.579B). What is the total energy stored in the core? (round to centesimals)

Consider an incompressible, stationary and fully developed flow where an interface between two Newtonian fluids with different dynamic viscosities exists. Taking surface tension into account there is a discontinuity in the pressure field in the interface between the two fluids.

If we have a voltage of 1.2V at the entrance of a MCP6N11-005 Instrumentation Amplifier, can we use the output of this device as a source voltage for a dsPIC33EP256MU806?

Considering the open loop KG(s), with G(s)=α/s and K=50. The step response of the unity feedback system in closed loop...