TERM 3 Exemplar test


Question 1 1 Explain what a lever is.


Question 2 2 Draw a diagram for each of these levers, showing where the load force, effort force and the fulcrum are positioned: 2.1


first-class lever


2.2 second-class lever 2.3 third-class lever


Question 3 3 The principle of using levers to gain mechanical advantage is used in some of our Technology tools. Name one tool that uses the principle for each class of levers.


Question 4 4 When gears mesh they turn in opposite directions. Draw a diagram to show how you can make the input gear and the output gear turn in the same direction.


(3)


(1)


(3)


(2)


Question 5 5 If an input gear has an RPM of 150, what will the RPM on the output gear be for the following ratios? 5.1 4 : 1 5.2 1 : 3 5.3 1 : 2 5.4 2 : 1


(2)


Question 6 6 Make a 2-D sketch to show a gear system where the output force is five times greater than the input force. The system has a ratio of 1 : 5.


Question 7 7 Make a 3-D sketch of a gear that intermeshes at an angle to change the turning force and its direction through 90°. What is the name of this gear?


Question 8 8 What materials would be suitable to make gears for the following: 8.1 a child’s toy 8.2 a gear in a car’s gearbox


Term 3 Exemplar test 129


(2)


(4)


TERM 3


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