TECHNICAL ROUND QUESTIONS OF MARUTI SUZUKI INDIA LIMITED !!

1. The purpose of jigs and fixtures are to

a. Increased production rate
b. Increased machining accuracy
c. Facilitate interchangeable manufacturing
d. Enable employ less skilled operators
e. All of the above

Ans:e

2. Tool life of the cutting tool is most affected by

a. Cutting speed
b. Tool geometry
c. Cutting feed and depth
d. Microstructure of material being cut
e. Not using coolant and lubricant
Ans:a

3. A feeler gauge is used to check

a. Radius
b. Screw pitch
c. Surface roughness
d. Unsymmetrical shape
e. Thickness of clearance
Ans:e

4. Metal in machining operation is removed by

a. Tearing chips
b. Distortion of metal
c. Shearing the metal across a zone
d. Cutting the metal across a zone
e. Pushing the metal with tool
Ans:c

5. Ductility of material can be defined as

a. Ability to undergo large permanent deformation in compression
b. Ability to recover its original form
c. Ability to undergo large permanent deformation in tension
d. All of the above
e. None of the above
Ans:a

6. Inconel is an alloy of

a. Nickel, chromium and iron
b. Nickel and copper
c. Nickel and chromium
d. Nickel and zinc
e. Nickel and lead

Ans:a

7. Casting defects caused by the molten metal is

a) Blow holes
b) Swell
c) Scab
d) All of the above
Ans.: d

8. Forming operation which does not involve rotation of work piece is

a) Spinning
b) Thread rolling
c) Ring rolling
d) Upsetting
Ans.: d

9. Greater forging capacity is achieved with

a) Mechanical press
b) Power hammer
c) Hydraulic press
d) None of them
Ans.: c

10. Which of the following welding process uses consumable electrodes

a) TIG
b) MIG
c) Thermit
d) Laser
Ans.: b

11. The crystal structure of alpha iron

a) BCC
b) FCC
c) HCP
d) Cubic
Ans.: a

12. Severe quenching can cause

a) Blow holes
b) Warping
c) Inclusions
d) Non of them
Ans.: b

13. Glass bead peening on components done to

a) Improve creep strength

b) Improve fatigue strength

c) Improve finish

d) Impart further coating

Ans.: b

14. Trajectory of a robot mean :

a) Path traced by the end effectors

b) Kinematics of Robot

c) Robot joints

d) Robot programming
Ans: a

15. Rayleigh’s method of computing the fundamental natural frequency is based on

a)Conservation of energy

b)Conservation of momentum

c)Conservation of masses

d)Laws of statics

Ans: a

Source-https://www.freshersworld.com/

WHY PETAL DISC BRAKES ARE USED INSTEAD OF ROUND DISC BRAKES?

Generally the disc of disc brake is round in shape but few disc brakes have petal shaped disc.What is the reason behind this?We will try to find out the answer of this question in this article.

When we apply brakes the kinetic energy of the wheels is converted to heat energy.As brake pads are in direct contact with the disc, so disc gets heated up.Now, if this heat is not properly dissipated then the disc may get overheated and might change its property.For this purpose, holes are provided in disc brakes.But in extreme conditions we require additional mechanism to remove this heat.For this purpose cuttings are provided in disc in the form of petal,as a result the diameter of disc remains same so effective braking is achieved with enough cooling.

You can notice that not all discs are given petals. Some discs are the usual round ones while only some get petals and there is a good reason for it. The reason petals are given is if the disc is expected to undergo heavy braking forces and has to dissipate a lot of heat a lot quickly or else if the disc is of a smaller size and the area is not enough to handle to heat dissipation rate.

Also petal discs look cooler and they add an extra aesthetic value to the entire thing.

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KNOW WHY BEER BOTTLES ARE GREEN OR BROWN IN COLOUR !!!

You might have imagined why beer is sold in brown or green bottle?Why not in transparent bottle?This article will give you the answer.

In earlier days beer was sold in clear bottles which was transparent. The manufacturers noticed that the liquid in the clear bottles was getting affected by the sunlight and smelled very bad. This is because the UV rays coming from sun reacts easily with the acid in beer when stored in clear bottles. So when light enters beer bottle it breaks down the acid in the hops and this reacts with the already present sulphur, making the beer taste horrible. In order to solve this problem brands started using brown colour for beer bottles as brown stops the UV rays to react with the liquid inside the bottles.

After World War II there was a shortage of brown bottles and hence European manufacturers of beer began to use green bottles. Eventually these green bottles became a symbol of sophistication because most of these Euro beers were of extremely high quality. And so we got to the brown and green variants of a typical beer bottle.