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 |
|
| 6. |
The following type of bonding is strongly directional in solids. |
| A. |
Vander Waal’s |
| B. |
Ionic |
| C. |
Metallic |
| D. |
Covalant |
|
| 7. |
Fog is an example of colloidal system of |
| A. |
solid dispersed in gas. |
| B. |
solid dispersed in liquid. |
| C. |
liquid dispersed in gas. |
| D. |
gas dispersed in liquid. |
|
| 8. |
Chromium molybdenum steel can not be welded using __________ welding. |
| A. |
thermit |
| B. |
electrical resistance |
| C. |
oxy-acetylene |
| D. |
any of these |
|
| 9. |
Speisses is a mixture of the following: |
| A. |
Arsenides of heavy metals. |
| B. |
Antimonides of heavy metals. |
| C. |
Arsenides & antimonides of heavy metals. |
| D. |
Iron, cobalt and nickel. |
|
| 10. |
Auto collimator is used to check |
| A. |
flatness |
| B. |
angle |
| C. |
rotor balancing |
| D. |
roughness |
|
