Mechanisms. General revisionOnline version Check how much have you learned about mechanisms with the following test. by Rubén Campos 1 Mechanisms are elements that transmit .................. and movements. a forces b rotations c accelerations d elements 2 Which is the force that we have to apply to raise an object of 300Kg with one pulley? a 3000Kg b 300Kg c 150Kg d 600Kg 3 Which is the force that we have to apply to raise an object of 300Kg with a moveable pulley? a 3000Kg b 300Kg c 150Kg d 600Kg 4 Which is the force that we have to apply to raise an object of 800Kg with a hoisting tackle composed by six pulleys? a 100Kg b 400Kg c 200Kg d 600Kg 5 Calculate the speed at which the big wheel rotates knowing that the small one rotates at a speed of 10 000rpm and the diameter of the small wheel is 10cm and the big one 50cm a 2000 rpm b 200 rpm c 20000 rpm d 200000rpm 6 If we join one gear of 60 teeth that rotates at 6000 rpm to another gear of 10 teeth. At which speed will it rotate? a 1800 rpm b 4000 rpm c 3600 rpm d 20000 rpm 7 The rack and pinion mechanism transforms a rotatory movement to a.................... one a mixed b up and down movement c rotatory d linear 8 In the International System of units (S.I) the unit used to measure the rotatory speed is........ a degrees per minute b revolutions per minute c radians per second d radians per minute
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