Mahindra & Mahindra Technical interview questions for Campus

Mahindra & Mahindra Technical interview questions for Campus

1. sinhө - hyperbolic
2. X_n+1 = X_n – f ‘ (X_n) / f (X_n) - - - 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
   1. 28Cr50
   2. 40Cr
   3. C35

8. What is the type of failure in Key that is used in Flange Coupling
9. Spring is not subjected to
   1. Hoop stress
   2. Deflection]
   3. Torsional shear
   4. 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
    1. Increasing of wall temp
    2. Compression ratio
    3. Supercharge
    4. Engine speed

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

16. Match the following
    1. Mohrs circle - Principle stress
    2. Martensite - Hard and brittle Phase
    3. Degree of freedom - kinetics
    4. Section modulus - flexural rigidity
    5. Plastic water bottle - blow moulding

17. which cycle uses two isentropic and two isothermal processes
18. dynamic loading which consideration
    1. Elastic limit
    2. Poisson ratio
    3. Yield strength
    4. Endurance limit

19. A material is loaded still yield point and the load is removed.
    1. Increase in yield stress
    2. Decrease in yield stress
    3. Unchanged yield stress
    4. Reaches UTS

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

22. match
    1. kirchoff law - electrical circuit
    2. Daltons law - partial pressure
    3. Hooks law - elasticity
    4. Joules law - work equivalent to heat