1.Which one of the following is incombustible ?
A. H2
B. CCl4
C. C2H2
D. 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. |
| A. | hard | | B. | soft | | C. | silicon carbide | | D. | aluminium oxide | |
| 3. | Tin based white metals are used, where bearings are subjected to |
| A. | high pressure & load. | | B. | low pressure & load. | | C. | high temperature. | | D. | large surface wear. | |
| 4. | Friction factor for fluid flow in pipe does not depend upon the |
| A. | pipe length. | | B. | pipe roughness. | | C. | fluid density & viscosity. | | D. | mass flow rate of fluid. | |
| 5. | All of the following alloying elements of steel increases hardness but sacrifice ductility, except |
| A. | nickel | | B. | vanadium | | C. | molybdenum | | D. | chromium | |
