1. What is velocity ratio of gear drive?
It is the ratio of the following terms:
Where
d= Diameter of the wheel
N =Speed of the wheel
ω = Angular speed
2. Which type of pair does cam and follower constitutes?
The cam and the follower have a line contact and constitute a higher pair
3. What is the Function of the distributor in petrol vehicles?
Spark timing.
4. Which is not present in CI engines?
Carburettor
5. Why chromium is used in steel alloys?
To prevent from corrosion
6. When can the trusses be called rigid trusses?
A truss is said to be rigid in nature when there is no deformation on application of any external force.
7. What are the examples of lower pairs?
Pairs having surface areas contact between the links is called lower pairs
Examples include:
• Nut turning on a screw
• Shaft rotating in a bearing
• Universal joint
• Steering in automobiles
• All pairs of a slider crank mechanisms
8. What are higher pairs and give examples?
Pairs having a line or a point contact between the links is called higher pairs
Examples include:
• Cam and follower pair
• Ball bearing
• Roller bearing
• Wheel rolling on a surface
9. The ball and a socket joint is an example of which pairs?
Spherical pairs
10. What is turning pair?
When one pairs has a turning or rotating motion relative to other pairs, such pairs are called turning pairs.
It is the ratio of the following terms:
Where
d= Diameter of the wheel
N =Speed of the wheel
ω = Angular speed
2. Which type of pair does cam and follower constitutes?
The cam and the follower have a line contact and constitute a higher pair
3. What is the Function of the distributor in petrol vehicles?
Spark timing.
4. Which is not present in CI engines?
Carburettor
5. Why chromium is used in steel alloys?
To prevent from corrosion
6. When can the trusses be called rigid trusses?
A truss is said to be rigid in nature when there is no deformation on application of any external force.
7. What are the examples of lower pairs?
Pairs having surface areas contact between the links is called lower pairs
Examples include:
• Nut turning on a screw
• Shaft rotating in a bearing
• Universal joint
• Steering in automobiles
• All pairs of a slider crank mechanisms
8. What are higher pairs and give examples?
Pairs having a line or a point contact between the links is called higher pairs
Examples include:
• Cam and follower pair
• Ball bearing
• Roller bearing
• Wheel rolling on a surface
9. The ball and a socket joint is an example of which pairs?
Spherical pairs
10. What is turning pair?
When one pairs has a turning or rotating motion relative to other pairs, such pairs are called turning pairs.
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