Q. Which of the following fastening devices has its both ends threaded ?

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Q. Duralumin is an alloy of aluminium and copper. Percentage of copper in duralumin is

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Q. Copper is not present as an alloying constituent in

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Q. Lead is added to 60:40 brass primarily to improve

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Q. Air intake for an air compressor should be preferably taken from

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Q. Current asset of a factory includes the

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Q. If a solid is compressed adiabatically in its elastic range, its __________ remains constat

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Q. 'GASOHOL' widely used in Brazil as a motor fuel is a mixture of alcohol and

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Q. On decreasing the grain size of a polycrys-talline material, the property most likely to deteriorate is

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Q. It is possible to form martensite

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Q. Which of the following material handling equipments is not suitable for moving materials in varying paths ?

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Q. Multistage compression is necessary for high efficiency,

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Q. __________ can not increase the fatigue strength of a material.

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Q. If the head is doubled in & centrifugal pump, the power required will increase in the ratio of

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Q. Work hardenable alloy steel used to make the bucket wheel excavators, blades of bulldozers and other earth moving equipments contain iron, carbon and

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Q. Electrometallurgy is not involved in the extraction of __________ from its ore.

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Q. The bank of tubes located at the back of the domestic refrigerators are the __________ tubes.

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Q. Material having negative co-efficient of linear expansion is

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Q. Specific gravity of hot metal (pig iron) is __________ times that of the blast furnace slag.

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Q. __________ is the hardest material out of the following.

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