Q. The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 x 10⁻¹⁶ m² . S⁻¹ and it is 1.94 x 10⁻¹⁴ m² S⁻¹ at 1200 K. The activation energy (in k. J.mole⁻¹ ) for the diffusion of Ni in Cu is

View solution

Q. The magnitude of water hammer caused in pipe flow is independent of the

View solution

Q. A metalloid possesses the characteristics of both the metals and non-metals. Which of the following is not a metalloid ?

View solution

Q. Two solutions A1 & A2 have pH value of 2 & 6 respectively. It implies that the solution

View solution

Q. Which of the following is a disaccharide?

View solution

Q. Hardness & tensile strength of austenitic stainless steel can be increased by

View solution

Q. Which of the following metals occurs in nature in their free metallic state ?

View solution

Q. The most suitable material for a sewer for carrying storm water is

View solution

Q. In a totally irreversible isothermal expansion process for an ideal gas, ΔE = 0, ΔH = 0. Then ΔQ and ΔS will be

View solution

Q. Sulphur is melted in the sulphuric acid plant most commonly by employing

View solution

Q. Coke is added in the blast furnace to

View solution

Q. A balanced draught boiler furnace employs __________ draught fan.

View solution

Q. Aluminium oxide (an abrasive) is used for grinding

View solution

Q. In a casting, cold shut defect is caused by

View solution

Q. Even minute presence of impurities in copper impairs its electrical conductivity seriously. Electrolytic refinning of blister copper is resorted to, when

View solution

Q. Lead is most readily dissolved in

View solution

Q. Which of the following is a synthetic abrasive ?

View solution

Q. Dezincification is a form of corrosion, which specifically applies to

View solution

Q. Water hammer in pipelines results, when the flowing fluid

View solution

Q. The preferred alloying element for low temperature applications of steel is

View solution