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6 .
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. |
7 .
Chromium molybdenum steel can not be welded using __________ welding.
| A. | thermit |
| B. | electrical resistance |
| C. | oxy-acetylene |
| D. | any of these |
8 .
The fluid property, due to which, mercury does not wet the glass is
| A. | surface tension |
B. | viscosity |
| C. | cohesion | D. | adhesion |
9 .
Laminar flow of a Newtonion fluid ceases to exist, when the Reynolds number exceeds
| A. | 4000 | B. | 2100 |
| C. | 1500 | D. | 3000 |
10 .
When the momentum of one fluid is used for moving another fluid, such a device is called a/an
| A. | jet pump |
| B. | blower |
| C. | acid egg |
| D. | none of these |
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