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MSSC-M3 Manufacturing Processes Exam Questions with Correct Answers

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MSSC-M3 Manufacturing Processes Exam Questions with Correct Answers Levers are classified as __________. -Ans- First class, Second class, or Third class A(n) __________ is produced when the forces applied to a lever cause it to rotate. -Ans- rotational movement The mechanical advantage of a second-class lever can be found by the ratio of the length of the __________ arm divided by the length of the __________ arm. -Ans- effort, resistance A spring scale is used to measure __________. -Ans- force The mechanical advantage of a first-class lever can be found by the ratio of the length of the __________ arm divided by the length of the __________ arm. -Ans- effort, resistance The English unit of measurement of weight is the __________. -Ans- pound-force (lb-f) A second-class lever has its __________. -Ans- load between the fulcrum and the effort arm A __________ is a bar or beam atop a fulcrum that is used to transmit force from one point to another. -Ans- lever Mass is the __________. -Ans- amount of material in an object 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. -Ans- effort, resistance The Law of Moments can be used to determine __________. -Ans- both the force needed to balance or force needed to move a load A third-class lever has its __________. -Ans- effort arm between the fulcrum and the load A mechanism refers to __________. -Ans- both parts or a complete machine The three common types of mechanisms are levers, __________, and inclined planes. -Ans- wheels A first class lever can move greater forces if __________. -Ans- the effort arm is lengthened and the resistance arm is shortened The metric system expresses force in __________. -Ans- newtons A wheelbarrow is an example of a __________ lever. -Ans- second class How should the lever shown move? -Ans- counterclockwise A pair of ice tongs is an example of a __________ lever. -Ans- third-class A force that makes an object rotate about a point is called __________. -Ans- torque Torque is calculated by multiplying a force times __________. -Ans- distance from the fulcrum that a force is applied Which of the following is one of the six mechanism safety rules? -Ans- Keep your work area safe and clean. Mechanical advantage is the ratio of the force required to move a load divided by __________. -Ans- the effort force applied The mechanical advantage of an inclined plane is the ratio of the __________ of the inclined plane divided by its __________. -Ans- length, height The coefficient of friction is the ratio of the force of friction divided by the __________. -Ans- normal force The four properties of a cam are: rise, fall, __________, and constant velocity -Ans- dwell What is the mechanical advantage of this incline plane with the object weight and force need to move it shown? -Ans- 2 The double rocker linkage is one type of __________ linkage. -Ans- four bar A __________ is often mounted on a shaft by means of a key. -Ans- Cam A linkage is a system of __________ attached together to transmit energy from one point to another. -Ans- Bars A __________ linkage changes rotary motion into reciprocating (back and forth) motion. -Ans- Slider crank An inclined plane is a flat surface set at an angle above the __________. -Ans- horizontal

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