WorksheetsGrade 9 Mechanisms Revision
Total questions: 20
Worksheet time: 11mins
The most commonly used gear other than the "cog" gear is a (a) gear
What does the r stand for in rpm
Rotation
Revolutions
Rendering
Repetition
Which of the following gears turn rotational movement into linear movement
Spur
Bevel
Rack
Worm
When liquid or fluid is used to produce force or movement. It is called (a)
Which type of gear is used to change the direction of rotation through 90 degrees?
Spur
Bevel
Rack
Worm
What is the purpose of a differential gear in a vehicle?
To increase speed
To transfer power to all wheels
To reduce friction
To control steering
Which gear type is most commonly used in bicycles?
Sprocket
Spur
Rack
Cog
Select all the correct options. A Ratchet and Pawl system is:
to prevent movement
allow movement in one direction only.
to slow things down
to speed things up
A device with two projections pointing in opposite directions to which a rope can be tied.
(a)
A disc with a groove cut into the circumference
(a)
Which gear is used mostly in situations that require power to be transmitted at right angles
Bevel
Spur
Rack
Pinion
(a) gears can have different angles of application but tend to be 90 degrees.
What type of gear is commonly used in situations that require power to be transmitted at right angles?
Bevel
Spur
Rack
Pinion
What does the term 'rpm' stand for?
Rotation Per Minute
Revolutions Per Minute
Rendering Per Minute
Repetition Per Minute
True or False
A gear is a machine component used to transmit motion or force.
True
False
Which of the following can be seen as ADVANTAGES of using a pulley system?
Reduces friction and heat
Must be in a straight line
Runs very quietly
Can be used in wet environments
Which of the following can be seen as DISADVANTAGES of using a pulley system?
Reduces friction and heat
Must be in a straight line
Runs very quietly
Can be used in wet environments
What type of gear is commonly used in bicycles?
Sprocket
Spur
Rack
Cog
What is the gear ratio for a driver gear with 50 teeth and a driven gear 25 teeth? Remember your answer must be a ratio.
(a)
What is the velocity of the driven gear, IF the driver gear has 50 teeth and turns at 1000 rpm and the driven gear has 25 teeth?
(a)
