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Define the fineness modulus of aggregate. What is it used for?
The following laboratory tests are performed on aggregate samples:
a) Specific gravity and absorption
b) Soundness
c) Sieve analysis test
What is the significance and use of each of these tests?
Define the following terms:
a) Saturated Surface-Dry (SSD) conditions of aggregates
b) Absorption of aggregates
c) Free water on aggregates
What welding process will you recommend to weld the circumferential weld holding the bottom attachment ( weld 2) . Design the welding geometry to weld the cylinder body to ( weld 2) the bottom plate. Assume cylinder wall thickness to be 0.5” and the bottom plate thickness to be 1 inch. Show the welding symbol. Assume cylinder diameter to be 2 inches
Discuss 5 different desirable characteristics of aggregate of aggregate used in Portland cement concrete.
What are the three mineralogical or geological classifications of rocks, and how are they formed?
a 65 mm diameter solid shaft is to be welded to a flat plate by a fillet weld around the circumference of the shaft. determine the size of the weld if the torque on the shaft is 3 kn m. the allowable shear stress in the weld is 70 mpa.
a 125 x 95 x 10 mm angle is joined to a frame by two parallel fillet welds along the edges of 150 mm leg. the angle is subjected to a tensile load of 180 kn. find the lengths of weld if the permissible static load per mm weld length is 430 n
A solid catalyzed gaseous reaction has the form A + B ↔ C (6) assuming the operating condition of the catalyst is such that the external and internal diffusion steps have negligible pressure gradients, propose rate equations for the following cases: (a) The adsorption of A on the catalyst is controlling (b) The surface interaction between adsorbed A and adsorbed B is controlling (c) The desorption of C from the surface is controlling
The reduction of CO2 with H2 on Pt catalysts is described by the equation CO2(G) + H2 (ads) → H2O + CO According to which well-known mechanism does this hydrogenation proceed (with explanation)?
