Q. Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron.

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Q. Minimum thermal efficiency of a steam boiler may be around __________ percent

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Q. The temperature at which the magnetic property of iron disappears (i.e., it becomes non-magnetic) and its electrical conductivity & specific heat also changes, is called the 'Curie point', which is __________ °C.

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Q. Fatigue limit improvement by over stressing the metal by successively increasing the load is called coaxing. In fatigue failure, the material fails

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Q. Principal alloying elements of cast tool alloys which have very high wear resistance & high temperature strength are

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Q. Which of the following is the most suitable material of construction for the condenser tubes, where the cooling medium is brine (salty water)?

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Q. Which of the following is an ore dressing operation ?

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Q. Gratings is associated with the measurement of

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Q. __________ joint is mostly used for joining pipes carrying water at low pressure.

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Q. Which of the following approaches the ideal gas behaviour most closely ?

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Q. Which of the following is not the function of a volute casing provided in a centrifugal pump ?

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Q. The pressure outside a bubble/droplet of liquid is __________ the internal pressure.

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Q. Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of

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Q. Powder metallurgy technique is used in the production of __________ tools.

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Q. Adhesives

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Q. In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C.

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Q. Normalising of a casting does not

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Q. The swift cup test evaluates the following property of a sheet metal.

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Q. __________ is the most important element, which controls the physical properties of steel.

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Q. The order of a chemical reaction

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