The spot welding is done on two thick steel sheets of 3 mm.The current is 4500 A for 0.15S on each spot. The other necessary data is given are follows:
Diameter of electrode = 6 mm
Resistance = 375 µΩ
Density of material = 8700 kg/m3
Melting specific energy =2.5 Mj/kg
Then the amount of heat generated and heat dissipated will be _______.
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A casting (spherical) solidifies in 20 min. The solidification time for another casting of same material, which is 27 times heavier than the original casting will be ________.
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A truss is shown in the figure given below,The forces in the members (i) and (ii) of truss will be ________.
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Which one of the following is not the solution method of transportation problems?
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Hungarian method is utilized to optimize and solve assignment problem.
In the moving average method of forecasting the number of periods of data is dependent on the:
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Moving average method is a technique to make analysis of data points by forming a series of averages of different subsets of the complete data. The period selected depends on the nature of movement of interest. So the number of periods of data depends on the criteria of accuracy.
A can solve 90% of the problems given in a book and B can solve 70%. Probability that at least one of them will solve a problem, selected a random from the book is ________.
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The family of conic represented by the solution of the D.E.(4x + 3y +1) + (3x+ 2y +1) dy =0 is
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The least value of a for which f(x) =x2+ ax + 1 is increasing on [1, 2] is ________
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The system equations x+ y+ z =6, x + 2y + 3z = 10, x +2y + λz = 12 is inconsistent, if λ is ________.
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