FSG#003
1. If PA=PB, in which direction will the piston move?
a) To the right
b) To the left
c) It will not move
d) Not enough information
2. Which is the time period?
a)√2 *T
b) T/√2
c) T/2
d) 2*T
3. The roof of an electrically heated home is 6 m long, 8 m wide, and 0.25 m thick, and is made of a flat layer of concrete whose thermal conductivity is k 0.8 W/m · °C . The temperatures of the inner and the outer surfaces of the roof one night are measured to be 15°C and 4°C, respectively, for a period of 10 hours. Determine the rate of heat loss through the roof that night. Answer in kW (xxx.xx)
4. Calculate the output voltage (Vost) when loaded with a 1kΩ resistor (Answer in V, keep 2 decimals, xxx.xx)
5. A series resistance-capacitance bridge as shown below has a standard capacitor for C1, and R3= 10kΩ. Balance is achieved with 100Hz supply frequency when R1=125Ω and R4=14.7kΩ. Calculate the resistive and capacitive components of measured capacitor (answer in the form xuF, yOhm and round to 2 decimals)
6. Given the magnitude plot of the transfer function determine which of the following is the transfer function of the system:
A)100(s^2+s)/(s^3+100s+11)
B)(s+1)/(s^2+110s+100)
C)(s^2+110s+100)/100(s+1)
D) 100(s+1)/(s^2+110s+100)
7. Homogenous cylinder with mass mk and radius R=0,5m is adjusted in weightless vertical metal pipe which main axis is coincident with cylinder axis. One side of the pipe is placed at the floor so that there are no turning frictions, and the other side is adjusted at the center m of a thin and homogenous stick with m=3kg and lenght l=2m. The stick has at its edges 2 small spheres with equal mass m1=m2=0.5kg. A thin weightless rope is wrapped around the cylinder is passing through the pulley of mass m=4kg and radius r=0.1m, and at its free edge there is body Σ of mass m=3kg. Initially the system stays still and after t=0 we let it move and until t1=2sec the pulley has done N=20/π rotations. Assume the pulley has no turning frictions and the rope is always stretched and does NOT slide at cylinder's perimeter or at the pulley. (Moment of inertia of the pulley I(pulley)=1/2m*(r^2) and moment of inertia of the stick for the axis that tangently passes through its center I(stick)=1/12m*(l^2) and g=10m/s^2) Calculate: a) The acceleration of body Σ b) Force from the rope to body Σ during t=0 -> t=2 sec c) Torque of the system as of the axis of the cylinder at t1=2sec (Answer type: " (x, y, z) " where x is (a) at m/s^2, y is (b) at Joules and z is (c) at kg*(m^2)/s
Answer in x,x,x
Δυσκολία 11/10 αλλά το CRT μπορεί.
8. What engine is allowed?
a.13B-REW
b. Yamaha R15
c. Hayabusa Engine
d. Honda CBR 1000RR
9. Which of the following belts configuration is legal?
a. FIA 8853/2016 specified: two vertical anti-submarine belts 60 mm wide mounted 100 mm apart, two lap belts 50 mm wide angled at 40 degrees from vertical mounted 75 mm forward of the seat back to seat bottom junction, two shoulder straps 75 mm wide at 10 degrees below the horizontal mounted 230 mm apart, with the driver in the upright position.
b. SFI 16.4 specified: three vertical anti-submarine belts 50 mm wide mounted 100 mm apart, two lap belts 50 mm wide angled at 80 degrees from horizontal mounted 70 mm forward of the seat back to seat bottom junction, two shoulder straps 75 mm wide at 10 degrees above the horizontal mounted 230 mm apart, with the driver in the reclined position.
c. SFI 16.6 specified: two anti-submarine belts 50 mm wide at 20 degrees forwards from vertical mounted 100 mm apart, two lap belts 50 mm wide angled at 70 degrees from horizontal mounted 76 mm forward of the seat back to seat bottom junction, two horizontal shoulder straps 75 mm wide mounted 180 mm apart, with the driver in the reclined position.
d. FIA 8853/2016 specified: two anti-submarine belts 50 mm wide at 10 degrees rearwards from vertical mounted 100 mm apart, two lap belts 80 mm wide angled at 65 degrees from vertical mounted 70 mm forward of the seat back to seat bottom junction, two shoulder straps 50 mm wide at 20 degrees below horizontal mounted 200 mm apart, with the driver in the upright position and HANS.
10. The following water tank is simply touching the floor with no support, has a bottom surface area of A=20 cm^2 and it contains water of density ρ=1000 kg/m^3 up until h=1m. The tank is then sealed by a plug which has placed on it a spring with k=1000 N/m and a body of m=10 kg attached on the other end. The system is balancing. We then push the body on top a distance of d=0.2m towards the ground. Determine if the tank will bounce upwards when the body oscillates. The tank & plug weigh together 3 kg. g=9.81m^2/s
a. It will bounce
b. It won't bounce
11. Which part of the program address space is p stored in the following C code?
a) Code/text segment
b) Data segment
c) Bss segment
d) Stack
12. Air at 100°F is flowing (laminar flow) over a flat plate 1 ft wide. Estimate the drag. The air speed is 7.2 ft/sec. (Reynolds number is given 4*10^4)
a) 0.015 N
b) 0.00038 slug*ft/s^2
c) 15e-4 N
d) 0.0034 slug*ft/s^2
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