Placement Papers - Jindal Steel

Hi, Myself Jitesh Dhuria have attended the Jindal Interview and have uploaded the placement paper.

Technical:

1. What is the principle on which centrifugal compressors work_______? Ans. Conversion of K. E to pressure energy.
2. _________ has a non-linear stress-strain curve. Ans. Rubber.
3. _________has a highest value of poissons ratio. Ans. Rubber.
4. Due to which of the following reasons, the flexible coupling is used. Ans. Easy to resemble.
5. ____________springs are used to absorb shocks and vibrations. Ans. Torsion.
6. Which of the following is correct? Ans. Absolute pressure =gauge pressure+atmospheric pressure.
7. The amount of heat required to raise the temperature of 1kg of water through 1 degree Celsius is called. Ans. Specific heat at constant pressure.
8. The value of the universal gas constant is. Ans. 8.314 kJ/kg – mol K.
9. A chemical fuel is a substance which releases_______________on combustion. Ans. Heat energy.
10. The ignition quality of petrol engine fuel is________.Ans. octane number.
11. For the petrol engine for vehicles the air-fuel ratio for maximum power generation is of the order of. Ans. 12:1.
12. Why fusible plug is fitted in a small boiler? Ans. To extinguish fire if the water level in boiler falls below the alarming limit.
13. The draught that a chimney produces is called. Ans. Natural draught.
14. What is equivalent evaporation? Ans. It is the amount of water evaporated from and at 100 degrees Celsius into dry saturated steam.
15. __________is a none +ve displacement compressor. Ans. Reciprocating compressor.
16. In a ball bearing______made harder than a stress. Ans. Ball.
17. Hardness is the measure of following________. Ans. Toughness.
18. If e=0 the bodies are_____. Ans. Perfectly elastic.
19. In cross belt drives the power transmission between pulley rotations is ____. Ans. Opposite disc.
20. The internal resistance that the body offers to meet with two loads or ext force is called. Ans. Stress.
21. The material having the same elastic property in all directions are called as _________ materials. Ans. Isotropic.
22. The bar c/s A is subjected to a tensile force P the normal stress as on the oblique plane will be max when the inclination of the plane to the axis of bar. Ans. 45 degree.
23. In which of the following cases does unsteady heat flow occur____. Ans. Annealing or Casing.
24. The monochromatic emissivity of white body at all wavelengths and temperature is equal to____ unity.
25. Due to which of the following reasons hydrogen cannot be liquified at room temperature? Don't know.
26. The ratio of the specific heat of a liquid to that of the specific heat of a standard liquid. Ans. Specific gravity I think.
27. The tendency of an unclosed body to be lifted up in the fluid due to upward force opposite to gravity. Ans. buoyancy.
28. An ice cube is floating in a glass of water, as cube melts water level Ans. falls I think.
29. Re=inertia force/viscous force.
30. In a cantilever beam of length l L causing a load alone intensity varying uniformly from 0 at the free end to upper unit runs at the fixed end. The maximum bending is  Ans.WL2/3.
31. The point of contra flexure in a load and deforms to the section   Ans. The bending moment changes sign.
32. A simply supported beam of span L is carrying a point load W at the mid-span, what is the deflection at the center of beam Ans. WL3/48EI.
33. Which of the following is theories is suitable for ductile material---maximum shear stress theory?
34. In India largest power plant located at Ans. Niveli.
35. ____steel is widely used for railway tracks. Ans. high carbon.
36. _______ is the important component which controls the physical properties of steel. Ans. carbon.
37. In resistent welding, pression is released. Ans. after the weld coils.
38. Which of the following casting methods are steel and cast iron pipes cast? Ans. centrifugal casting.
39. When the speed of the engine fluctuates continuously above and below mean speed, the governor is said Ans. Hunting.
40. Which of the gears is recommended for speed reduction Ans. 50:1.
41. The flow is said to be turbulent when Re>4000.
42. The centrifugal pump calculation is reduced by, Ans. Reducing the suction level.
43. In a rotodynamic pump the increase in energy level is due to Ans. pressure energy only.
44. The working of which of the following hydraulic units is based on Pascal's law. Ans. hydraulic press.
45. Equilibrium conditions for coplanar concurrent forces are Ans. sigma H=0, and sigma V=0.
46. The force which does not meet at one point and line of action do not lie on the same plane is known as _________force. Ans. must not close.
47. The condition of equilibrium for coplanar non-concurrent forces are Ans. sigmaH=0, sigmaV=0, sigma M=0.
47. A__________pair is a pair of 2 equal and opposite forces acting on body in such a way that the lines of action of 2 forces are not in same straight line. Ans. couple.
48. The % of oxygen by weight in the atmosphere is. Ans. 23.
49. The source of energy is. Ans. coal, oil, uranium.
50. The Fourier law of conduction. Ans. Q= -K. A. Dt/dx.