MSSC Manufacturing Processes and Production Exam (questions and answers)

MSSC Manufacturing Processes and Production Exam (questions and answers) The three common types of mechanisms are levers, ______, and inclined planes. - CORRECT ANSWER-wheels The metric system expresses force in ______. - CORRECT ANSWER-newtons A spring scale is used to measure ______. - CORRECT ANSWER-force The English unit of measure of weight is the ______. - CORRECT ANSWER-poundforce (lb-f) The Law of Moments can be used to determine ______. - CORRECT ANSWER-both the force needed to balance OR force needed to move a load Torque can be calculated by multiplying the distance from the fulcrum and ______. - CORRECT ANSWER-the force applied A force that makes an object rotate about a point is called ______. - CORRECT ANSWER-torque A second-class lever has its ______. - CORRECT ANSWER-load between the fulcrum and the effort arm A third-class lever has its ______. - CORRECT ANSWER-effort arm between the fulcrum and the load A(n) ______ is produced when forces applied to a lever cause it to rotate. - CORRECT ANSWER-rotational moment Mechanical advantage is the ratio of the force required to move a load divided by _____. - CORRECT ANSWER-the effort force applied The mechanical advantage of a third-class lever can be found by the ratio of the length of the ______ arm divided by the length of the ______ arm. - CORRECT ANSWEReffort, resistance The coefficient of friction is the ratio of the force of friction divided by the ______. - CORRECT ANSWER-normal force Rolling friction is ______. - CORRECT ANSWER-less than both static and kinetic friction What is the unit of measure for the coefficient of friction? - CORRECT ANSWER-it has no unit One application that takes advantage if both high and low friction is a(n) ______. - CORRECT ANSWER-belt sander A wheel reduces friction because _____ friction is less than sliding friction. - CORRECT ANSWER-rolling The mechanical advantage of an inclined plane is the ratio of the ______ of the inclined plane divided by its ______. - CORRECT ANSWER-length, height The double rocker linkage is one type of ______ linkage. - CORRECT ANSWER-four bar The slider crank linkage is also known as the ______ linkage. - CORRECT ANSWERthree bar What type of linkage consists of a driver arm, connecting rod, and a follower? - CORRECT ANSWER-double rocker The follower of the ______ linkage moves in an arc. - CORRECT ANSWER-crank rocker A ______ linkage changes rotary motion into reciprocating (back and forth) motion. - CORRECT ANSWER-slider crank The crank rocker linkage is one type of ______ linkage. - CORRECT ANSWER-four bar A ____ is mounted on a shaft by means of a key. - CORRECT ANSWER-cam The four properties of a cam are: rise, fall, ______, and constant velocity. - CORRECT ANSWER-dwell A cam is a wheel that, when combined with a cam follower, produces a(n) ______ motion. - CORRECT ANSWER-recip