Mechanical Devices Quiz
Test your knowledge of Mechanical Devices, with this quiz.
This quiz consists of 15 questions, including multiple-choice and short-answer questions on the topic of Mechanical Devices for GCSE Design and Technology.
For multiple-choice questions, choose the correct answer. Scroll down to begin the quiz.
Questions
Which type of motion moves back and forth in an arc?
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In a first-order lever, where is the fulcrum positioned?
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Which of the following is a function of a cam and follower system?
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What is the purpose of a pulley system?
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In a simple gear train, what happens when a larger gear drives a smaller gear?
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Define rotary motion and give an example of where it is used in a mechanical device.
Rotary motion is movement in a circular direction around a fixed axis. An example is the motion of a bicycle wheel.
Describe how a bell crank linkage changes the direction of force.
A bell crank linkage is designed to change the direction of a force by 90 degrees. When force is applied to one arm of the linkage, it pivots around a fixed point, transferring the force to the other arm in a perpendicular direction.
What is the function of a follower in a cam and follower system?
The follower moves up and down (or follows a specific pattern) as the cam rotates, converting rotary motion into reciprocating or oscillating motion.
Explain how a second-order lever provides a mechanical advantage.
In a second-order lever, the load is positioned between the fulcrum and the effort. This reduces the effort required to lift the load, providing a mechanical advantage as the effort arm is longer than the load arm.
Identify one advantage and one disadvantage of using a simple gear train in a mechanical system.
Advantage: It allows torque and speed to be adjusted efficiently.
Disadvantage: It can create friction and require lubrication to work smoothly.
How does a push/pull linkage transfer force in a straight line?
A push/pull linkage consists of two fixed pivot points and two moving links that allow force to be transferred in a straight-line motion, maintaining the direction of input movement.
Describe how a pulley system can reduce the effort needed to lift a heavy object.
A pulley system spreads the weight of an object over multiple pulleys, reducing the amount of effort needed to lift it. A system with more pulleys increases the mechanical advantage, making lifting easier.
What happens when a gear with 20 teeth drives a gear with 40 teeth?
The larger gear (40 teeth) will rotate at half the speed of the smaller gear (20 teeth) because it has twice as many teeth, resulting in a reduction in output speed but an increase in torque.
Explain the difference between linear and reciprocating motion, giving an example of each.
Linear motion moves in a straight line in one direction (e.g., a train on a track).
Reciprocating motion moves back and forth along the same path (e.g., a sewing machine needle).
Why do engineers use different types of motion in mechanical systems?
Engineers use different types of motion to suit specific functions, improve efficiency, and optimise mechanical advantage. For example, rotary motion is useful in wheels and turbines, while reciprocating motion is essential in pistons and pumps.
