Automobile Engineering in ME
An engine has a clearance volume of 100 cm³ and a swept volume of 800 cm³. The compression ratio is

0.33402777777778
0.37569444444444
0.29236111111111
0.41736111111111

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Automobile Engineering in ME
The main characteristics of a maintenance free (MF) battery is that

A maintenance free battery requires little maintenance during normal use and it is sufficient to add water instead of an electrolyte containing sulphuric acid
A maintenance free battery has a relatively short shelf life when compared with standard batteries
Since it is sealed, the water in maintenance free battery is not lost through evaporation thus accordingly it is not necessary to top up the cells with water
Recharging of a maintenance free battery is neither required nor possible

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Automobile Engineering in ME
The main function of a master cylinder is to

Ensure that all the wheel brakes are supplied with the same amount of fluid pressure
Convert brake pedal force into hydraulic pressure
Adjust the extent of brake pedal free play
Boost the force applied to brake pedal

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Automobile Engineering in ME
When the front wheels of a vehicle are locked during braking, then

Rear tyres skid across the road surface, and the vehicle spins around
Front tyres skid across the road surface, and the vehicle spins around
Stopping distance becomes extremely long
Driver loses control over the steering, and the vehicle continues moving in its current direction

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