FSG#009_DONE 21.01.2021

1) Calculate the heat produced by a 30 ohms resistor which takes a current of 3 amperes when it is switched on for 15 seconds.

5.2 kJ

3200 J

4050 J

3.08 kJ

2) In the following system k=50N/mm and m=50kg. Calculate the natural frequency (give answer in hz round to 2nd decimal)

4) The increase of tire angular speed leads to :

a) tire thread overheat

B) increase of tire pressure

C) invcrease of effective tire radius

D) slip ratio creation

5) Referring to the following figure, determine the voltage level that the output will reach during the pulse. (give answer in V round to 1 decimal)

6) A car is taking a steady state turn of 12m radius banked at 10deg.If the coefficient of friction is 2 the maximum speed is (answer in km/h round to 2 decimals)

7) Which of the following statements considering the tires are correct?

a. If a puncture occurs from external factor the team may change the tires with no time penalty.

b. IF the team wishes to change from wet to dry the required time will be added to the total time.

c. Tire change must be done within 13 min after the driver change.

8) Which of the following is not true about the BOM?

a. There must be 2 systems as CBOM.

b. It must be filled in metric units.

c. The costs of hand or power tool must be included in the CBOM.

d. The processes for the modification of a bought part are required in the DBOM.

e. The systems, assemblies and subassemblies are defined by the website

9) Which material is suited as a firewall for a cooling hose running through the monocoque under the driver`s legs?

a. Aluminum with holes smaller than 8 mm diameter

b. Aluminum grid with a minimal spacing of 2 mm between the strings

c. There is no firewall needed

d. The material does not matter, if it is sealed

e. Aluminum without any holes

10) A Racing Car is moving at 28km/h while the engine is at 10000rpm. If the Primary drive ratio is 3.66,the 1st Gear ratio is 2.421, the Final drive ratio is 3.5 and the diameter of wheel 0.51m find the car’s SlipRatio. (For rpm conversion ignore the decimals. For wheel speed round to the nearest integer. For theSlip Ratio take into consideration two decimals )

11) Consider a car with the following characteristics: 1) suspended mass 165kg 2) front weight bias 50% 3) wheel rates (with tire) 25N/mm front & 35N/mm rear 4) wheel base 1.54m 5) ground clearence 40mm 6)front & rear motion ratio = 1 7) higher front wing endplate edge from the ground 245mm 8) foremost edge of front wing 900mm from the center of ftont axle . If we assume that a driver of 70kg gets in the car without a change of CG, is the front wing acceptable from the rules? (gravity acceleration =9.81m/s^2)

a. Yes

b. No

12)Which of the following inpurity in cast iron makes it hard and brittle?

A. Silicon

B. Sulphur

C. Manganese

D. Phosphorus

13) A spur gear with helical teeth transfers a moment of 2kNm. The diameter of the gear is 50mm and the helix angle is β=15°. What is the minimum axial force to be supported? (give answer in kN round to 1 decimal)

14) What is the maximum height of the centre of gravity to be successful at the tilt test with a trackwidth with of 1100mm (answer in m round to 2 decimals )