A. solid and vapour phases are in equi-librium
B. solid and liquid phases are in equilibrium
C. liquid and vapour phases are in equilibrium
D. solid, liquid and vapour phases are in equilibrium
E. none of the above
Related Mcqs:
- Auto-ignition reaction time for petrol engine first decreases with increase in fuel air ratio, reaches a minimum value and then increases with subsequent increase in fuel air ratio. The minimum value occurs in the region of________________?
A. Lean mixture
B. Chemically correct fuel air ratio
C. Rich mixture
D. Unpredictable - The region between the separation streamline and the boundary surface of the solid body is known as__________________?
A. wake
B. drag
C. lift
D. boundary layer
E. aerofoil section - Carbonation of coal is the process of________________________?
A. pulverising coal in inert atmosphere
B. heating wood in a limited supply of air at temperatures below 300°C
C. strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel
D. binding the pulverised coal into brick-ettes
E. enriching carbon in the coal - Efficiency of rankine cycle can be increased by_________________?
A. decreasing initial steam pressure and temperature
B. increasing exhaust pressure
C. decreasing exhaust pressure
D. increasing the expansion ratio
E. increasing number of regenerative heaters - The fire tubes in, a Coarran and Scotish marine boiler are_________________?
A. horizontal
B. vertical
C. inclined
D. both horizontal and vertical
E. horizontal and inclined - The fusible plug in small boilers is located ________________?
A. in the drum
B. in the fire tubes
C. above steam dome
D. over the combustion chamber
E. at the inlet of chimney - 02 content in atmospheric air on volume basis is___________________?
A. 21%
B. 23%
D. 30%
D. 40%
E. 70% - Pulverized fuel is used for___________________?
A. better burning
B. more calorific value
C. less radiation loss
D. medium sized units
E. stoker fired boilers - In ordetjo obtain superheated steam, a superheater is added in an existing boiler. As as result, furnace vacuum will _________________?
A. remain unaffected
B. improve C. worsen
C. may improve/worsen depending on size
D. unpredictable - The radius of a dished head is taken approximately as______________________?
A. one-fourth
B. half
C. one
D. two
E. three
