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MCQs 1: Which of the following factors increases hardenability of a metal?

Alloying elements Fine grain size Very high carbon content in steel All of the above
Answer Explanation

MCQs 2: Which carburising method has high production rate?

Pack carburising Liquid carburising Gas carburising All of the above
Answer Explanation

MCQs 3: Which of the following statements is/are false for heat treatment processes?

Martempering process is designed to overcome limitations of quenching Pearlite is obtained as the final phase in martempering process Water is used as quenching medium in Jominy end quench test All of the above
Answer Explanation

MCQs 4: Which of the following is the last phase obtained after completing heat treatment cycle in patenting process?

Bainite Martensite Pearlite None of the above
Answer Explanation

MCQs 5: Which element precipitates at the grain boundaries, when austenitic stainless steel is heated at 900 °C?

Aluminium carbide Chromium carbide Magnesium carbide Molybdenum carbide
Answer Explanation

MCQs 6: The intergranular corrosion can be prevented using ______

stabilized grade of stainless steel containing titanium and niobium as an alloying element low carbon grade of stainless steel both a. and b. none of the above
Answer Explanation

MCQs 7: Knife Line Attack is a type of _______

bimetal corrosion intergranular corrosion localized corrosion uniform corrosion
Answer Explanation

MCQs 8: The erosion corrosion can be controlled by _______

increasing the flow velocity through pipes increasing temperature of fluid minimizing turbulence all of the above
Answer Explanation

MCQs 9: Which of the following methods is not used to coat metallic elements to prevent corrosion?

Electroplating Metal cladding Metal spraying None of the above
Answer Explanation

MCQs 10: Which of the following statements is/are true for erosion corrosion?

The dissolution rate of protective film increases due to turbulent flow Erosion corrosion occurs due to high turbulent fluid flow The corrosion rate can be reduced by reducing the velocity of fluid All of the above
Answer Explanation

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