General Science Class 6th MCQs=745

Force and Machine                

• A machine is a device that helps to make work easier.
• There are seven types of simple machines. (Lever, Pulley, Inclined plane, wheel and axle, screw, wedge)
• There are three types of pulley, fixed pulley and movable pulley and compound pulley.
• The speed of the driven shaft depends on the number of teeth in each gear.
• When one gear drives another gear, both the gears revolve in the opposite direction. If it is needed to turn both the gear in the same directions, a third gears called “idler gear”.

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Pulley is simple machine used to …the objects.
a) Move                      
b) Lift             
c) Rotate                     
d) stop

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A flag pulley is an example of………………
a) Fixed pulley                       
b) Movable pulley
c) Wheel-axle             
d) gear

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A movable pulley can lift greater load by applying ……………effort.
a) Equal  
b) Less
c) more           
d) none of these

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A hand drill consists of two mutually perpendicular……….
a) gear                        
b) pulleys
c) wheels                    
d) leavers

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A … is a push or a pull. NTS PST 24/11/2019 (8:30)
a) Simple machine      
b)  Pulley        
c) Force                      
d) none of these

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