Q. Which of the following welding processes is NOT suitable for joining thin metal sheets? A. Gas Metal Arc Welding B. Electro Slag Welding C. Electron Beam Welding D. Laser Beam Welding Ans: Electro Slag Welding

Q. At equilibrium, the maximum number of phases in a three-component system at CONSTANT PRESSURE is: (A) 1                           (B) 2                           (C) 3                          (D) 4 Ans: 4

Q. Which of the following materials are protected by passivation (i.e., formation of a thin adherent film on the surface) from corrosion? P. Aluminium alloys Q. Mild steel R. Stainless steel S. Silver (A) P & Q                  (B) Q & R          (C) Q & S          (D) P ...

Q. During decarburization in a steel bath at 1550 oC, the compositions of dissolved C (wt.%C) and dissolved O (wt.%O) follow the relation: (wt.%C)(wt.%O) = K When the partial pressure of CO (𝑝𝐶𝑂) is 1 atm, K = 0.002. If 𝑝𝐶𝑂 = 0.1 atm, what is the value of K, at the same temperature? Note: Assume ...

Q. Arrange the following in the correct sequence of operations in an integrated steel plant: i. Basic Oxygen Furnace (BOF) ii. Blast Furnace (BF) iii. Ruhrstahl Heraeus Degassing Process (RH) iv. Ladle Furnace Process (LF) (A) BOF→BF→LF→RH                             (B) ...

Q. In froth flotation, the primary purpose of adding collectors is to: A. make the surface of the mineral hydrophobic. B. make the surface of the mineral hydrophilic. C. stabilize the froth. D. adjust the pH. Ans: make the surface of the mineral hydrophobic.

Q. Analysis of a flow phenomenon in a system requires the following variables: i. Pressure ii. Velocity of the fluid iii. Size of the system ivDensity of the fluid v. Viscosity of the fluid According to Buckingham Pi theorem (dimensional analysis) what is the number of ...

Q. What is the most-abundant anion in a 2CaO.SiO2 melt? (A) (SiO4) 4 -              (B) (Si2O7) 6 -             (C) (Si3O10) 8 -            (D) (Si4O14) 10 - Ans: Option A

Q. For a laminar flow of a liquid metal over a flat plate, the thicknesses of the velocity and thermal boundary layers are 𝛿𝑣 and 𝛿𝑡 respectively. Kinematic viscosity (viscosity/density) of liquid metal is significantly lower than its thermal diffusivity . Based on this information, pick the ...

Q. Sum of the series 5, 10, 15,........................ , 500 is Sol:

Q. A 20 m long steel tape used for survey is found to be short by 10 cm. If the area measured with the steel tape is 5000 m2, the actual area in m2 is                                             . Ans: 4945.0-4955.0

Q. In a level terrain, a vertical orebody of 20 m uniform width is worked by surface mining method. The density of the ore is 2.5 tonne/m3. The ultimate pit has a depth of 60 m, width of 20 m at pit bottom, and a pit slope of 45o. The overall stripping ratio for this condition in m3/tonne ...