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# Mechanical Gears Quiz

 in the pulley and belt mechanism, you held onto the output of the mechanism and tried to stop movement to test for the mechanism's...torque
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#### Definitions

in the pulley and belt mechanism, you held onto the output of the mechanism and tried to stop movement to test for the mechanism's... torque
in a mechanism, when the input goes from a small gear to an output which is a larger gear, the speed will... When this happens, the amount of torque will.... decrease, increase
when a big gear turns a small one, the output provides more... but less... than the input. speed, torque
which of the following mechanisms moved more quickly, the lead screw or the rack and pinion? consider the gear ratio. which mechanism moved the farthest with one turn of the crank handle? lead screw, rack and pinion
the difference between linear and reciprocating mechanisms is that in a linear mechanism, in order to make the output move in the opposite direction, you have to turn the input... In a reciprocating mechanism, the mechanism moves...... when the input moves... opposite, back & forth, in one direction
gear ratio formula turns of output gear = number of teeth on output gr
turns of output gear = number of teeth on input gr
for a pulley and belt, what is the position of the input shaft compared to the output shaft? parallel
for a pulley and belt, is the speed increased, decreased, or constant? increased
for a pulley and belt, is the torque increased, decreased, or constant? decreased
for a pulley and belt, what is the input to output ratio? 1:2.5
for a pulley and belt, is the flow of power reversible? yes
for a pulley and belt, does the input shaft turn in the same direction as the output shaft? yes
for a pulley and belt, does the input shaft turn in the same direction as the output shaft if the belt is crossed? no
for a worm and wheel, what is the angle of the input shaft compared to the output shaft? they're perpendicular
for a worm and wheel, is the speed increased, decreased, or constant? decreased
for a worm and wheel, is the torque increased, decreased, or constant? increased
for a worm and wheel, what is the gear ratio? 20:1
for a worm and wheel, is the flow of power reversible? no
for a worm and wheel, is the direction of travel reversible? yes
for a simple gear with idler, what is the position of the input shaft compared to the output shaft? parallel
for a simple gear with idler, is the speed increased, decreased, or constant? decreased
for a simple gear with idler, is the torque increased, decreased, or constant? increased
for a simple gear with idler, what is the gear ratio? 4:1
for a simple gear with idler, is the flow of power reversible? yes
for a simple gear with idler, compare the direction of travel between input and output gears. they turn the same way
for a simple gear with idler, predict what the direction of travel would be between the input and output gears if the idler gear is eliminated from the mechanism. the output gear would turn the opposite way
for a cam and follower, what is the type of input movement? rotary
for a cam and follower, what is the type of output movement? reciprocating
for a cam and follower, how many times does the follower move up and down with one revolution of the crank? once, 1:1
for a cam and follower, is the flow of power reversible? no
for a cam and follower, is the direction of travel reversible? yes
for a lead screw , what is the type of input movement? rotary
for a lead screw, what is the type of output movement? linear
for a lead screw, how many revolutions of the crank are needed to move the screw block 1 inch? 6
for a lead screw, is the flow of power reversible? no
for a lead screw, which is increased in the output? force or speed? speed
for a lead screw, is the direction of travel reversible? yes
for a bevel gear assembly, what is the angle of the input shaft compared to the output shaft? 90 degrees
for a bevel gear assembly, is the speed increased, decreased, or constant? constant
for a bevel gear assembly, is the torque increased, decreased, or constant? constant
for a bevel gear assembly, what is the gear ratio? 1:1
for a bevel gear assembly, is the flow of power reversible? yes
for a universal joint, what is the angular range between the input shaft and the output shaft in which this mechanism will work? 90<x<270
for a universal joint, is the speed increased, decreased, or constant? constant
for a universal joint, is the torque increased, decreased, or constant? constant
for a universal joint, what is the speed ratio of the input shaft to the output shaft? 1:1
for a universal joint, is the flow of power reversible? yes
for a universal joint, do the input and output shafts turn in the same direction? yes
for a crown and pinion, what is the angle of the input shaft compared to the output shaft? perpendicular
for a crown and pinion, is the speed increased, decreased, or constant? increased
for a crown and pinion, is the torque increased, decreased, or constant? decreased
for a crown and pinion, what is the gear ratio? 3.2:1
for a crown and pinion, is the flow of power reversible? yes
for a crown and pinion, is the direction of travel reversible? yes
for a rack and pinion, what is the type of input movement? rotary
for a rack and pinion, what is the type of output movement? what distance does the rack move with one revolution of the crank? linear, 2 inches
for rack and pinion, if the diameter of the pinion gear were increased, would the rack move a shorter or longer distance? longer
for a rack and pinion, is the flow of power reversible? yes
for a rack and pinion, is the direction of travel reversible? yes
for a crank and slider, the input to this system is what type of motion? rotary
for a crank and slider, the output of this system is what type of motion? reciprocating
for a crank and slider, how far does the slider move each revolution of the crank? once, 1:1
for a crank and, if the diameter of the crank gear were increased, would the slider move a shorter or longer distance? longer
for a crank and slider, is the flow of power reversible? yes

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