# EXAM of TECHNOLOGY_mechanisms and Electricity

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EXAMEN DE TECNOLOGIA: mechanisms and Electricity
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## Mechanical Engineering

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EXAM OF TECHNOLOGY. NAME: SURNAME: COURSE: Calculate the weight to be added to balance the following mechanism. (1 point) Calculate the weight to be added to balance the following mechanisms. Given a pulley train with these diameters: D1=1, D2=4, D3=1, D4=4, D5 =2, D6=3, calculate the nº of revolutions of wheel 6 if wheel nº1 rotates 24 revolutions. (1 point) Calculate the amplitude of the horizontal movement due to the rotation of the wheel Order the figures from less to more stability. The point drawn refers to the center of masses. d ? 0,75 R=1 m D1 D3 D2 D4 D5 D6 ? 16  kg 1 m 1 m 1 m 2 kg 1 kg ? 1 k 1 m * * * *  ELECTRICITY 1.   Fil the following table with the empties values VOLTAJE INTENSITY RESISTANCE (Ώ)  10mv 20A 3A 25 Ώ  10mA 10K Ώ  1 mv 1A 25v 5 Ώ   2.   Draw a electrical circuit to control a bulb from two different positions using two way switches 3.   Indicate which of the bulbs are shining in the following circuits (asume that the main switches closet o the bateries are closed Circuit/bulb On/off A/1 B/1 B/2 B/3 C/1 C/2 C/3 D/1 D/2 D/3 4.   Draw the tecnical circuit of the next figure 5.   Calculate the electrical current that pases through the switch
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