Automobile Engineering Interview Preparation Guide
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Automobile Engineering frequently Asked Questions by expert members with experience in Automobile Engineering. So get preparation for the Automobile Engineering job interview

17 Automobile Engineering Questions and Answers:

1 :: WHY BIG TYRE USED IN REAR OF VEH?

Tractors have big rear tires because ,the larger the surface
area of the tractor's wheels touching the ground, the more
pulling power you have. Like how tractor pullers have large
tires.

Another reason is that the tractor doesn't have to operate
at a higher speed to get the same ground speed with larger
tires. Gear ratios don't have to be as high b/c of the
larger tires.
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2 :: WHAT IS KING PIN OFFSET?

A geometric parameter which is positive if the kingpin axis
intersects the wheel plane at or below ground level, or is
negative if the point of intersection is above ground level.
Also called scrub radius
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3 :: 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
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4 :: Explain different between two stroke engine four stroke engine?

In a two stroke engine, for every two rotations of the crank
shaft there will be one power stroke.Hence during
compression stroke, fuel will be drawn in to the crank case
(suction) and during power stroke, burnt fuel will be thrown
out through transfer ports (exaust).
In a four stroke engine, for every four rotations of the
crank shaft there will be one power stroke.
Here, suction, compression,power & exaust strokes are seperate
as there will be inlet and exaust valves.
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5 :: For the purpose of inflating car tyres, spray painting, etc. i.e. say a small workshop, what size of a compressor (CFM) is recommended? It will be generally for a hobby use and not commercial use?

spray painting it is generally used for painting in a very
smaller areas of any part and where it is very hard to paint
in a brush .... And to improve faster rate of painting,,
spray painting r used........usually reciprocating
compressor r used but size depends upon requirement...........
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6 :: does the design & fittings vary on the type of the vehicle engine.. why they use petrol for engines only & vice versa?

No, the type of fitting & design does not vary for automotive
segment. Its the same. However, its different in case of
aerospace & other sector.
In the fittings, usually of hole/shaft one of those is made at
the basic size so that it can accommodate the other one.
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7 :: By mixing oil in fule of four stroke bike will it damage engine, performance? if not than what happen?

yes, absolutely .. It leads to higher wear and tear in
cyclinder liners,piston and damage of the piston .. It even
leads to knocking and detonation where abnormal combustion
appears and dark smoke and harsh sound will be produced by
the engine.
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8 :: What is BHP & How it is measured?

BHP stands for Brake horse power
As the name implies it is the braking power required to
stall a engine Means horse power required to stop engine
rotation
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9 :: WHAT IS THE DIFFRENCE BITWEEN BS2 & BS3 ENGINE?

IN BS2 there is No catalytic converter to reduce formation
of co and HC whereas in BS3 catalytic converter is
available to reduce the formation of HC and CO. So less
emission of HC and co will take place in BS3
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10 :: WHAT IS THE MEANING OF CC OF 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.
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