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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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