Chemical Engineering Basics

1. Which one of the following is incombustible ?

H2 CCl4 C2H2 S

2. The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used. For general purpose cutter grinding __________ grinding wheel is normally used.

hard soft silicon carbide aluminium oxide

3.Tin based white metals are used, where bearings are subjected to

high pressure & load. low pressure & load. high temperature. large surface wear.

4.Friction factor for fluid flow in pipe does not depend upon the

pipe length. pipe roughness. fluid density & viscosity. mass flow rate of fluid.

5.All of the following alloying elements of steel increases hardness but sacrifice ductility, except

nickel vanadium molybdenum chromium