A vector field is given as follows
Q. A vector field is given as follows: 𝑓⃗ = (−𝑥2𝑦 + 𝑥𝑦2) 𝑖̂ + (𝑥2𝑦) 𝑗 The divergence of this field evaluated at (𝑥, 𝑦) = (2, 2) is_________________ Ans: -0.1 to 0.1 .
In the A-rich end of the A-B binary eutectic phase diagram
Q. In the A-rich end of the A-B binary eutectic phase diagram (shown below), the solidus and liquidus are straight lines The freezing range of the alloy with 16% B is___________(in oC to one decimal place) Ans: 95-105
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A steel is plastically worked in the temperature range below the nose of the TTT curve
Q. A steel is plastically worked in the temperature range below the nose of the TTT curve and above Ms, followed by quenching to produce fine martensite. What is this process called? (A) Martempering (B) Ausforming (C) Inter-critical forming (D) Normalizing Ans: Ausforming
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A long oil pipeline made of steel is suspected to have developed a scale on the inner surface
Q. A long oil pipeline made of steel is suspected to have developed a scale on the inner surface due to corrosion. Which of the following non-destructive techniques is the most suitable for detecting and quantifying such a defect? (A) Dye penetrant test (B) Magnetic particle inspection (C) Ultrasonic inspection (D) Acoustic emission Ans: Ultrasonic
In a Jominy end-quench test of the eutectoid plain-carbon steel, which of the
Q. In a Jominy end-quench test of the eutectoid plain-carbon steel, which of the following represents the sequence of microstructures observed from the quenched end of the specimen? (A) Fine Pearlite, Coarse Pearlite, Martensite and Pearlite, Martensite (B) Martensite, Martensite and Pearlite, Fine Pearlite, Coarse Pearlite (C) Coarse Pearlite, Pearlite and Martensite, Fine Pearlite, Martensite
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Arrange the following processes in INCREASING magnitude of surface roughness of the casting
Q. Arrange the following processes in INCREASING magnitude of surface roughness of the casting. P. Investment casting Q. Permanent mould casting R. Pressure die casting S. Sand casting (A) R < S < Q < P (B) P < S < Q < R (C) R < P < Q < S (D) Q <
Which of the following categories of materials is suitable as a filler for brazing of steel sheets?
Q. Which of the following categories of materials is suitable as a filler for brazing of steel sheets? (A) Epoxy resins (B) Near-eutectic alloys (C) Refractory alloys (D) Large freezing range alloys Ans: Near-eutectic alloys
Which of the following welding processes is NOT suitable for joining thin metal sheets?
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
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At equilibrium, the maximum number of phases in a three-component system at
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
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Which of the following materials are protected by passivation (i.e., formation of a thin adherent film
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 & R Ans: P & R