Mock paper for campus placement

Mock paper 2 for mechanical


1) The surface and sub-surface cracks in non-magnetic alloys can be easily located and detected by the following inspection method

a)X-ray testing

b)Ultrasonic testing

c)Magnetic particle inspection testing

d)Dye penetrant testing

e)Any one of the above


2) The sprue hole is

a) A casting defect

b) A hole made for riveting

c) A blind hole in jigs

d) An eccentric hole in dies for clamping

e) An opening in mould for pouring molten metal


3) Core print are used to

a) Strengthen core

b) Form seat to support and hold the core in place

c) Fabricate core

d) None of these.


4) Blow holes are casting defects

a) Which occur due to some sand shearing from the cope surface

b) Which take the surface of internal voids or surface depression due to excessive gaseous material not able to escape

c) Which occur due to discontinuity in metal casting resulting from hindered contraction

d) Caused by two streams of metals that are too cold to fuse properly

e) None of these


5) Molten iron is desulphurized by adding the following to the ladle

a)Carbon

b)Soda ash

c)Graphite

d)Ferro-silicon

e)Ferromaganese


6) Mechanical properties of the metal improve in hot working due to

a) Recovery of grains

b) Grain growth

c) Refinement of grain size

d) Reformation of columnar grains

e) Recrystallization


7) The following type of deformation of metals takes place in cold working and hot working

a)Elastic deformation

b)Plastic deformation

c)Viscous deformation

d)Isentropic deformation

e)Visco-elastic deformation


8) The increase in hardness due to cold working is called

a) Cold hardening

b) Hot hardening

c) Work hardening

d) Age hardening

e) Induction hardening


9) Hot working operation is carried at

a) Recrystallization temperature

b) Near plastic stage temperature

c) Below recrystallization temperature

d) Above recrystallization temperature

e) Below room temperature


10) Laser is produced by

a) Graphite

b) Ruby

c) Diamond

d) Aluminium

e) Emerald


11) In the drawing operation, metals flow due to

a) Ductility

b) Work hardening

c) Plasticity

d) Shearing

e) Yielding


12) In blanking operation, the angle of shear is provided on

a) Die

b) Punch

c) Both punch and die

d) Never provided at all

e) None of these


13) Laser beam machining process is used for machining

a) Very thick materials

b) Thin materials

c) Heavy sections

d) Is not used for machining

e) There is no such limitation


14) The compound die

a) Two or more cutting operations can be performed simultaneously

b) Cutting and formation operations are combined and carried out in single operation

c) Work piece moves from one station to other with separate operation performed at each station

d) All of above


15) If N.T.L. = specification limit, then

a) Process is in control, no action required

b) P-chart can replace Xbar & R chart

c) Small steps are taken to make N.T.L. > S.L.

d) Small steps are taken for centering of the process


16) For a new product, the desirable value of process capability ratio is

a) 1

b) 1
c) <1

d) 1.5


17) Principle of quality as a loss function has been given by

a) Kaizen

b) Taguchi

c) The Bell Lab

d) Phillip Crossby


18) There are seventeen successive points taken in between UCL and LCL for a process, then for an in-control process

a) At least 12 points must be on the same side of CL

b) At most 14 points can be on the same side of CL

c) At most 13 points can be on the same side of CL

d) At least 10 points must be on the same side of CL


19) A left hand tool on lathe is used for turning in the direction

a) From right to left

b) From left to right

c) Across the bed

d) In angular position on compound slide

e) Any direction


20) The different speeds on lathe are provided in

a) Arithmetical progression

b) Harmonical progression

c) Geometrical progression

d) Any one of above

e) None of above



21) Centering can be done most accurately on

a) Four jaw chuck

b) Three jaw chuck

c) Collet chuck

d) Magnetic chuck

e) All of the above


22) Counter sinking is the operation of

a) Enlarging the end of a hole cylindrically

b) Cone shaped enlargement of the end of a hole

c) Smoothing and squaring the surface around a hole

d) Sizing and finishing a hole

e) None of above


23) Machinability can be calculated and predicted by following factors:

a)Tensile strength

b)Brittle hardness

c)Shear angle

d)All of the above

e)None of the above


24) Machinability

a) Tends to increase with increase in hardness

b) Tends to decrease with increase in hardness

c) Remains unaffected with hardness

d) (b) is correct in general, but it can be drastically influenced by strain hardening and microstructure

e) None of the above


25) The advantage of vernier caliper over micrometer is that it

a) Is easier and quicker to use

b) Is more accurate

c) Can be used to make both inside and outside measurement over a range of size

d) All of above

e) None of above

Read More

Mock paper for campus placement

Mock paper 1 for mechanical

1) According to Gay-Lussac law for a perfect gas, the absolute pressure of given mass varies directly as
a) temperature
b) absolute
c) absolute temperature, if volume is kept constant.
d) volume, if temperature is kept constant.
e) remains constant, if volume & temperature are kept constant.

2) Superheated vapour behaves
a) exactly as gas.
b) as steam
c) as ordinary vapour
d) approximately as a gas
e) as average of gas and vapour

3) Intensive property of a system is one whose value
a) depends on the mass of the system, like volume
b) does not depend on the mass of the system, like
temperature, pressure, etc.
c) is not dependent on the path followed but on the state
d) is dependent on the path followed & not on the state
e) remains constant

4) The same volume of all gases would represent their
a) densities
b) specific weights
c) molecular weights
d) gas characteristic constants
e) specific gravities

5) properties of substances like pressure, temperature & density, in thermodynamic coordinates are
a) path functions
b) point functions
c) cyclic functions
d) real functions
e) thermodynamic functions

6) if a gas vapour is allowed to expand through a very minute aperture, then such a process is known as
a) free expansion
b) hyperbolic expansion
c) adiabatic expansion
d) parabolic expansion
e) throttling

7) first law of thermodynamics
a) enables to determine change in internal energy to the system
b) does not help to predict whether the system will or not undergo a change
c) does not enable to determine change in entropy
d) provides relation between heat, work & internal energy
e) all of the above

8) entropy is called the property of the system because
a) its derivative is zero for any process
b) it has same value at any two equilibrium state
c) it has a single value at each equilibrium state
d) it has a constant value at each equilibrium state
e) it depends upon the path followed by the system

9) if a steam sample is nearly in dry condition, then its dryness fraction can be accurately determined by
a) throttling calorimeter
b) separating calorimeter
c) combined separating & throttling calorimeter
d) bucket calorimeter
e) none of the above

10) on Mollier chart, flow through turbine is represented by
a) horizontal straight line
b) vertical straight line
c) straight inclined line
d) curved line
e) none of the above

11) In a throttling process
a) heat transfer takes place
b) work is done by the expanding steam
c) internal energy of steam changes
d) all of the above
e) none of the above

12) pick up the wrong statement about critical condition of steam
a) latent heat is zero
b) liquid directly becomes steam
c) specific volume of steam & liquid is same
d) this is the maximum pressure limit
e) all properties of liquid & steam are same

13) during polytropic process
a) heat transfer takes place across cylinder walls
b) work is done
c) steam may be wet, dry or superheated after expansion
d) all of the above
e) none of the above

14) the fusible plug in small boilers is located
a) in the drum
b) in the fire tubes
c) above steam dome
d) over the combustion chamber
e) at the inlet of chimney

15) steam in water tube boiler as compared to fire tube boiler
a) can be raised rapidly
b) is raised at slower rate
c) is raised at same rate
d) could be raised at fast/slow rate depending on design
e) none of the above

16) the overall efficiency of thermal power plant is
a) boiler efficiency, turbine efficiency, generator efficiency
b) all the three above plus gas cycle efficiency
c) carnot cycle efficiency
d) regenerative cycle efficiency
e) rankine cycle efficiency

17) size of boiler tubes is specified by
a) mean diameter & thickness
b) inside diameter & thickness
c) outside diameter & thickness
d) outside diameter & inside diameter
e) outside diameter alone

18) The temperature of flue gases at air heater outlet should be
a) 100o C
b) above dew-point temperature of flue gases
c) below dew-point temperature of flue gases
d) less than wet bulb temperature of flue gases
e) above wet bulb temperature of flue gases

19) tertiary air is the air used to
a) provide air around burners for obtaining optimum combustion
b) transport & dry the coal
c) cool the scanners
d) supply air for ignitors
e) convert CO (formed in lower zone of furnace) into CO2 at higher zone

20) boiler parameters are expressed by
a) tones/hr. of steam
b) pressure of steam produced
c) temperature of steam in oC
d) all of the above
e) none of the above

21) the condition of steam in boiler drum is always
a) dry
b) wet
c) saturated
d) supersaturated
e) superheated

22) film boiling occurs at
a) very low pressure
b) atmospheric pressures
c) medium pressures
d) very high pressures
e) none of the above

23) a thermal power plant designed to operate in cold climate is operated in hot climate; it will develop
a) more power
b) less power
c) same power
d) more or less depending on the size
e) unpredictable

24) which statement is not true for steam turbine in comparison to steam engines
a) there is no boiler-water contamination from lubricating oil as in a steam engine
b) turbine delivers smooth uninterrupted power at high rotating speeds
c) turbines have less weight per horse-power &
power wearing parts compared to steam engines
d) heat energy of steam is better utilized in steam
engines than in turbines
e) all of the above

25) velocity compounding involves
a) expansion of steam in stages
b) recovery of kinetic energy of steam leaving first
set of blades in subsequent rows of blades
c) velocity & pressure equalization at different stages
d) increased velocity after each stage due to
expansion of steam
e) none of the above

Read More

Hero Honda Campus Recruitment-2008

Selection procedure

written test(100 questions)

psychometric test(not an elimination round)

interview

out of 100 nearly 60 questions from technical 40 are general and verbal

some of the questions are

1.author of a book "" Jawaharlal Nehru

2.Delhi was the captial of India since

3.The highest two awards in India (four combinations are given)

4.Interferrometer and tachometer are used for measuring

5.dQ-dW=1 which of the following law is obeyed by the equation

6.load is controlled by using - governor , flywheel

7.question on entropy

more number of questions will be uploaded soon

Read More

Maruti Suzuki Campus Recruitment - 2008

Maruti selection procedure
written test(20 question only technical for 10 minutes)
Interview(15-30 minutes)

Written test
what is the unit to measure the exhaust in automobile.

2.what is the gear ratio in over drive
>1

3.in SI engine knocking occurs

)end of combustion

4.in milling process for smooth surface we give

low feed ,high speed

5.in heat exchanger what will u do to increase the heat transfer..

6.which instrument is used to measure the finished surface.......
a) vernier b)

macrometer...C).......

7.in automobile which type of belt is used..........
ans:flat type.........

8.what is the thickness of sheet metal used in automobile chasis..
a) 1mm .........b)2 mm

9.what will happen if we will increase the pressure angle of gear..
lesser power transmission & more pressure on bearings

10.what is the effect of supercharging..
a)efficiency increases b)effficiecy decreases....

11.why the exhaust temp in CI engine is less as compared with SI
engine.
ans.because of large quantity of air inside the cylinder.

12..why u use multi stage pumps??
ans high head

13.who has the highest vol.efficiency of all given pumps?
ans 1st gear pump

14.which is not a positive displacement type of pump??
Ans centrifugal pump

more number of questions will be updated soon

Read More

BPCL Campus Recruitment

The students are shortlisted for the interview on the basis of CPI

BPCL
1.Draw the diagram of the crank shaft
2.Draw the diagram of leaf spring
3.Show the load distribution on the leaf spring and where it is placed in the automobile.
4.Draw Shear force and bending moment diagram for the leaf spring and where the maximum bending moment is present.


more number of questions will be updated soon

Read More

IOCL campus recruitment -2008

The students are shortlisted for the interview on the basis of CPI

Interview questions from IOCL
1.Differentiate pumps and compressors
2.classification of pump
3.By using centrifugal pump how the pressure can be increased
4.How the refining process can be done
5.What are the mechanical components present in a refinery
6.Design a pipe which carries a liquid flowing through it.
7.Questions from the project done.


more number of questions will be updated soon

Read More

NTPC campus recuritment-2008

The students are shortlisted for the interview on the basis of CPI

Interview questions asked in NTPC
1.Bending moment diagram of simply supported beam
2.Wooden log is floating on a river - draw shear force diagram and bending moment diagram
3.what are the three T's in combustion process.
4.when the pressure is raised from 1 to 15 bar and when the pressure is raised from 15 to 115 bar in which case the work done is more
5.what was the efficiency of a Rankine cycle
6.why we use PIPOT TUBE
7.the installed capacity of ntpc plant and of India
8.types of boiler
9.types of draft used
10.types of chimney
11.how do chimneys worked
12.how do brick making factories work
13.what r condensers


more number of questions will be updated soon

Read More

John Deere Campus Recrutiment -2008

The position of John Deere in Fortune 500 is 98.
Their eligibility criteria is 6 spi in all the semesters and 60% in 10th and 12th.


The written test consists of Tech(25 qs) and aptitude(20 qs)
aptitude was easy and the tech paper consists of mainly manufacturing science, heat and mass transfer, quality control.

a question on 6 sigma

As the job is R&D they are mainly concentrating on strength of materials, machine design, CAD.

Some of the interview questions:
1.Draw the manufacturing process flow chart
2.By seeing an engine how one can distinguish whether it is an SI engine or CI engine.


more details will be updated soon.....

Read More

Questions from BAJAJ

1.For the same size which one is more efficient;
Engine working on Otto cycle
Engine working on diesel cycle
---
---

2.After saturation state the gas above the liquid can be called as

a. Perfect gas

b. Vapor

c. –-

3.Material of crank Shaft


4.Formula of degree of freedom related to 4 bar link


5.classius(second law of thermodynamics)


6.What happen if we put petrol in the diesel engine?
a. Knocking

b. Will not start

7.F force is acting on a rectangular bar of cross section A and the young modulus of

elasticity is E, then find the elongation in the bar.


8.Normal time=
Standard time + allowances
Standard time – allowances
–
–


9. One question on pipe flow, have to find out weather it is turbulent or laminar.

10.One question on heat treatment of materials

11.Which material has high % of carbon

Four alloy steels were given.

12.One question on the assumptions of Bernoulli equation.


13. One question on Tool angle Ans. back rack angle.

Few question based on the materials.

Read More

General questions related to different topics asked in the campus

melting pt of iron
steam turbine feed heater
drill mat composition
Ach welding
WEIR used Ans in flow measurement
possions ratio
gear strength
pig iron mfg process
gear materials
gear mech which is used to hold the gear
RATCHET MEch is ans
babbit metal composition
seamless tubing prep

Read More