Mechanical Gears Quiz
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64 terms
Terms | 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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