Q. Damage to metal surface by mechanical action is called

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Q. The escape velocity of a body on earth which is independent of its mass is about __________ km/second.

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Q. A reduction in thermal resistance during heat transfer does not occur in the

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Q. Unit of viscosity in CGS system is

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Q. Shaft/rotor speed is most accurately measured by a

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Q. __________ test determines the yield strength, Young's modulus of elasticity, percentage reduction in area & percentage elongation of a material.

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Q. The rolling process can not be used to produce

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Q. Co-efficient of performance of a Carnot cycle refrigerator operating between - 23°C and + 27°C is

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Q. Presence of nickel & chromium in steel does not raise its

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Q. Hot extrusion process is not used for making

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Q. Addition of __________ to steel does not help in improving its machinability.

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Q. Quartz is a __________ material.

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Q. A solution which resists change in its pH value on addition of acid/alkali is called the __________ solution.

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Q. Pick out the wrong statement.

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Q. The bolt is subjected to __________ when the nut is tightened by putting the washer beneath it.

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Q. Which of the following is not categorised as the ore agglomeration process ?

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Q. With increase in temperature, the surface tension of water

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Q. Laser is a device to produce

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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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