10 Questions
What is the main function of cranks and sliders in a mechanism?
To convert rotary motion into reciprocating motion
In which scenario can the crank arm be used as the driving force?
In the crankshaft
What is the relationship between the distance moved by the slider and the radius of movement of the crank arm?
The distance moved by the slider is twice the radius of movement of the crank arm
In which type of engine can the slider operate as the driver and turn the crank?
Steam engines
What is an example of a device that uses a crank and slider mechanism to compress air?
A compressor
What is the effect of a simple gear train on the direction of the rotation of the driver gear?
It reverses the direction of the rotation of the driver gear.
What happens to the speed of the driven gear when the gears in a simple gear train have different sizes?
The speed can be increased or decreased.
What is the purpose of using gears of different sizes in a simple gear train?
To change the speed of the driven gear.
What is the term used to describe the amount of change in speed in a simple gear train?
Velocity ratio.
What is the arrangement of the shafts in a simple gear train?
The shafts are parallel.
Study Notes
Cranks and Sliders
- Convert rotary motion into reciprocating motion
- Crank arm can be used as the driving force, such as in a crankshaft
- Slider can also operate as the driver, turning the crank, as seen in steam engines where the wheels are driven by steam pressure
- Slider movement is twice the radius of the crank arm's movement
Simple Gear Trains
- A simple gear train consists of two spur gears meshed and fixed on parallel shafts.
- The rotation direction of the driver gear is reversed in a simple gear train.
- The driven gear rotates in the opposite direction of the driver gear.
- When gears of different sizes are used, speeds can be increased or decreased.
- The ratio of the speed change is referred to as the velocity ratio.
This quiz covers the concepts of cranks and sliders, which convert rotary motion into reciprocating motion. It explores their applications and key characteristics.
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