71. Welding preferred for joining thin foils is
72. In drawing operation, the metal flows due to
73. Boundary layer thickens at solid-fluid interface
74. The figure below shows water flowing through a pipe. The pressure difference between points P and Q measured using a water-over-mercury manometer is
75. If density and diffusion coefficient are assumed constant, then governing equation for mass transfer of A dissolved in solid B is
76. What are the applications of nitriding?
77. By hot rolling process which of the following mechanical properties can be improved
78. Which of the following is not a method of carburizing?
79. One face of a furnace wall is at 1030°C and the othere is exposed to the room temperature (30°C). If the thermal conductivity of the furnace wall is 3W. m-1 k-1 and the wall thickness is 0.3 m the maximum heat loss (in W/m2) is
80. A square of 9 mm2 area is subjected to simple shear displacement √3 mm along x-direction, as shown below: The strain imparted will be
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