Correct answer
A. Alum (aluminium sulphate)
Explanation
The correct answer is Alum (aluminium sulphate).
For every 10% increase in the excess air; the fuel consumption increases by ________ percent?
Which of the following has the lowest viscosity (at a given temperature) of all?
For what value of Prandtl number, St = f/2?
Dittus-Boelter equation cannot be used for molten metals mainly due to its very low________?
A sample of well water contains 140 gm/m3 Ca2+ ions and 345 gm/m3 Na+ ions. The hardness of the sample of water, expressed in terms of equivalent CaCO3 in gm/m3 is (assuming atomic masses of Ca :40, Na : 23, C : 12, O : 16)?
Which of the following equations as suggested by Colebrook and White gives the increase in roughness of a new surface (ε0) with age/time (t) (where, ε = roughness of the surface after time’t’. α = a co-efficient to be experimentally determined)?