Q. Out of the following, __________ waves have the largest wavelength.

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Q. Pick the odd man out of the following.

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Q. A furnace is made of a refractory brick wall of thickness 0.5 metre and thermal conductivity 0.7 W/m.°K For the same temperature drop and heat loss, this refractory wall can be replaced by a layer of diatomaceous earth of thermal conductivity 0.14 W/m.K and thickness __________ metre.

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Q. Hot working of lead is carried out at

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Q. An engineer's hammer is made of high __________ steel.

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Q. Impeller & casing of centrifugal pump handling corrosive liquid and frequently running under cavitation condition is most prone to __________ corrosion.

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Q. Isotropic materials have the same __________ in all the directions.

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Q. The gases used in the treatment of asthma is a mixture of __________ and oxygen.

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Q. Number of electrons in the outermost orbit of a semi-conductor is

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Q. The condition of diffraction from a crystal is given by

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Q. Galena is an ore of

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Q. A reduction process is accompanied with increase in the

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Q. Draught produced by a tall chimney due to density difference between hot flue gas inside the Chimney and atmospheric air outside the chimney is more appropriately known as the __________ draught.

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Q. The dimensions of Planck's constant is the same as that of the

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Q. 1% concentration of water vapor in air is equivalent to __________ ppm (parts per million).

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Q. The ratio of coil diameter to wire diameter of a spring is called the spring

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Q. Dialysis is the process of separating substances in the

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Q. Silicon crystal can be converted to p-type semi-conductor by doping with

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Q. Large diameter reinforced cement concrete (RCC) pipes are generally joined by __________ joint.

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Q. Increase in the entropy of a system represents the

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