MAHINDRA PLACEMENT PAPER

sinhө - hyperbolic
Xn+1 = Xn – f ‘ (Xn) / f (Xn) - - - Newtons Raphson formula
3d3y/dx3 + 7d2y/dx2 - 4 (dy/dx)2 = 4 y2 order , degree
According to Newtonian Law, shear stress is directly proportional to velocity gradient.
in casting molten metal flows through _______. (runner)
welding -> preheating -> why
which one C% is high
28Cr50
40Cr
C35

Spring is not subjected to
Hoop stress
Deflection]
Torsional shear
Transeverse shear>>Ans


Global Warming CO2
Principal Stress = 1000 , -600. What is maximum shear stress
Order of efficiency….. 2 Stroke SI,,,,, 4 Stroke CI
if Inlet air temp increases, efficiency(petrol engine) increases but compressor efficiency decreases - - - True
In SI knocking is reduced due to increase of
Increasing of wall temp
Compression ratio
Supercharge
Engine speed


Specific energy is high?
Turning b. drilling c. grinding d. planning






Match the following
Mohrs circle - Principle stress
Martensite - Hard and brittle Phase
Degree of freedom - kinetics
Section modulus - flexural rigidity
Plastic water bottle - blow moulding


which cycle uses two isentropic and two isothermal processes
dynamic loading which consideration
Elastic limit
Poisson ratio
Yield strength
Endurance limit


A material is loaded still yield point and the load is removed.
Increase in yield stress
Decrease in yield stress
Unchanged yield stress
Reaches UTS


A thin wire is subjected to tensile load. Temperature is same. The resistance_______ (remains constant)
Aeroplane is flying at 800 kmph. Air temp. is zero.
Subsonic
Supersonic
Sonic


match
kirchoff law - electrical circuit
Daltons law - partial pressure
Hooks law - elasticity
Joules law - work equivalent to heat


MAHINDRA
Newton’s Law-Motion

Boy

In a drawer, 5 white socks and 8 black socks are there. To draw one pair of socks, minimum no of socks that has to be drawn? Ans.3
Radius of a cylinder is increased by 30%,then increase in volume will be -------(height is constant).Ans.69%


le’s Law-Pressure and volume relation

Joule’s Law-Mech. Equivalent of heat

Kirchoff’s Law-Electric circuit

Hooke’s Law-Elasticity

Air velocity-Anemometer



Stagnation pressure-pitot tube

Rpm-Stroboscope

Humidity-Hygrometer

Furnace temp-pyrometer



If a body is at -10 degree C(ice) and if it is to be converted into saturated vapour ,how much heat is necessary?



To study:



1. Strength of materials-Bending Moment Diagram,Cantilever beam (Basics)



2. Relative density



3. Natural frequency-spring mass system



4. Heat treatment-very basics



5. Pump efficiency



1. sinhө - hyperbolic



2. Xn+1 = Xn – f ‘ (Xn) / f (Xn) - - - Newtons Raphson formula





3. 3d3y/dx3 + 7d2y/dx2 - 4 (dy/dx)2 = 4 y2 order , degree



4. According to Newtonian Law, shear stress is directly proportional to velocity gradient.





5. in casting molten metal flows through _______. (runner)



6. welding -> preheating -> why





7. which one C% is high

a. 28Cr50

b. 40Cr

c. C35

8.


F







Stress type?

8. What is the type of failure in Key that is used in Flange Coupling



9. Spring is not subjected to





a. Hoop stress

b. Deflection]

c. Torsional shear

d. Transeverse shear>>Ans



10. Global Warming CO2



11. Principal Stress = 1000 , -600. What is maximum shear stress





12. Order of efficiency….. 2 Stroke SI,,,,, 4 Stroke CI



13. if Inlet air temp increases, efficiency(petrol engine) increases but compressor efficiency decreases - - - True





14. In SI knocking is reduced due to increase of



a. Increasing of wall temp

b. Compression ratio

c. Supercharge

d. Engine speed



Specific energy is high?

e. Turning b. drilling c. grinding d. planning

15.

Match the following

a. Mohrs circle - Principle stress

b. Martensite - Hard and brittle Phase

c. Degree of freedom - kinetics

d. Section modulus - flexural rigidity

e. Plastic water bottle - blow moulding



16. which cycle uses two isentropic and two isothermal processes



17. dynamic loading which consideration

a. Elastic limit

b. Poisson ratio

c. Yield strength

d. Endurance limit



18. A material is loaded still yield point and the load is removed.

a. Increase in yield stress

b. Decrease in yield stress

c. Unchanged yield stress

d. Reaches UTS



19. A thin wire is subjected to tensile load. Temperature is same. The resistance_______ (remains constant)



20. Aeroplane is flying at 800 kmph. Air temp. is zero.

a. Subsonic

b. Supersonic

c. Sonic



21. match

a. kirchoff law - electrical circuit

b. Daltons law - partial pressure

c. Hooks law - elasticity

d. Joules law - work equivalent to heat