1. What is SAE? Mention the importance of SAE to the automobile domain.

SAE stands for society of automotive engineers. This society is responsible for developing the standards for the engineering of powered vehicles of all kind. The vehicles may include car, boat, truck and even aircraft. SAE has developed standards for ground vehicles and aerospace vehicles. SAE also encourages students of engineering, technology, science and math’s disciplines. This society has been publishing technical information since 1906.

2. How does the thermostat work?

When the engine is too cold the thermostat closes the main valve, thus stopping the flow to the radiator. When the engine is too hot, it opens the main valve for normal circulation through the radiator.

3. Why involute curve used in gear?

● It’s smooth to drive the gear. ● In gears contact is only point, this type is curve take the more load than normal one

4. What does it mean when your car emits white smoke?

White smoke is a sign of a coolant leak as is milky brownish oil. This could be due to bad head gasket or cracked block. Burning oil smoke is usually more bluish in color. White smoke is usually associated with a coolant leak, but burning oil can also look like white smoke

5. What happens if gasoline is used in a Diesel engine? Diesel engine will work?

No, it will not work, as the Compression ratio of Petrol engine is 6 to 10 & that of Diesel engine is 15 to 22. Thus on such high compression, gasoline gets highly compressed & it may blast.

6. What is the range of the engine efficiency for two stroke engine? Why you don\'t see two stroke engines in car? What are problem with two stroke engine?

The range of two stroke engine is too high compare to the four stroke engine because of each revolution one power in two stroke engine. I cannot see the 2 stroke engine in car. Power loss is more.

7.What is the formula for calculating BHP in SI units?

Boiler horse power (BHP) is a power unit used for measuring the power output of boilers, widely used in the past, but now confined to North America. The boiler horsepower conversion formula is as follows. 1 Boiler Horsepower = 9,809.5 Watts

8.What is the meaning of CC engine?

CC stands for Cubic centimeter. CC represents the total volume of an engine cylinder. The engine which has more CC can produce more power than others.

9. Why freezer in the fridge is placed in top level?

Because density of cold air is higher than warm air, hence it is placed at top. Cold air comes downward & cool the bottom part.

10. Poisons ratio is higher in (rubber/steel/wood)

When a material is compressed in one direction, it usually tends to expand in the other two directions perpendicular to the direction of compression. This phenomenon is called the Poisson effect. Poisson’s ratio is a measure of the Poisson effect. For rubber = 0.5 For steel = 0.288 For wood lesser than 0.2 Thus Poisson’s ratio is higher in RUBBER.