A. > 1

B. 1

C. 0.1

A. 2

C. 1

D. 4

A. Joule

B. Watt

C. Joule/Second

A. Nu = (Pr) (St)

B. Nu = (Re) (Pr)

C. Nu = (Re) (Pr) (Gz)

A. 1000

B. 10

D. 100

A. Decreases

C. Remain same

D. May increase or decrease

B. Increases

C. Remains unchanged

D. Increases exponentially

B. Diameter of Horton sphere is normally 6 to 25 metres and it is supported by 6 to 12 nos. tubular or rolled section column

C. Thickness of spherical shell is half that of the cylindrical vessel under same operating pressure condition. Besides, the ratio of surface area to volume is less for sphere than any other shape; hence insulation required is less

D. Horton sphere is used for the storage of gases and volatile liquid at a moderate pressure of 1 to 10 kg/cm2

B. Parallel

C. Forward

D. None of these

A. Condense

B. Form wet steam

D. Neither A. nor B.

A. Alcohol

B. Fruits jam

D. Salt

A. 1

B. 0

D. > 1

B. None of these

C. Refractoriness under load (RUL)

D. Refractoriness

A. PV = RT + B/V + y/V2 + .

B. p = [RT/(V b)] (a/TV2)

D. (P + a/V2)(V-b) = RT

A. Mixing

C. None of these

D. Wetting

A. Q ? T2

C. Q ? T3

D. None of these

B. None of these

C. 970

D. 3.97

A. By-product coke ovens

B. Roof of open hearth furnace

C. Dome of blast furnace stoves

A. Chrome magnesite

B. Silica

D. Zirconia

A. None of these

C. Should be less than one fifth the diameter of the shell

D. Is not the same as baffle pitch

A. There is no central downtake

C. The tube bundle is suspended on bracket

D. Downtake is formed by the annular space between the bundle and the shell

A. 5

B. 55

C. 40

B. 1.25

C. 14

D. 28

A. An increased weir height improves the tray efficiency at the cost of high plate pressure drop; optimum wear height being 40-90 mm for column pressure above atmospheric and 6-12 mm for vacuum columns

B. For segmental downcomers, the chord length is 60-80% of the column diameter. An initial value of downcomer area of 12% is taken in the design

C. Width of the calming section provided at the inlet and outlet sides of the plate is 75 mm for column diameter below 1.5 metres and 100 mm for larger diameter columns

A. Be = (400/G) 400

B. Be = 200(G-1)

C. Be = 145 (145/G)

A. Yellow

C. White

D. Grey

A. Bubble cap trays though most expensive are the best in situations, where low vapour rates is to be handled and a positive liquid seal is essential at all flow rates

B. Murphree efficiency of all the three trays are nearly equal, however the peak efficiency is generally higher for sieve and valve trays than the bubble cap

D. Valve trays have the highest turn down ratio (i.e. the ratio of the highest to the lowest vapour flow rates) and thus provide the maximum flexible operating range

A. 1

B. 2

C. unpredictable

A. A2 is more alkaline than solution A2

B. A1 is highly acidic

C. A1 is very slightly acidic

B. Thick walled

C. Having the value of Ao/Ai > 2

D. Both B. and C.

A. None of these

B. 0.50 D

C. 0.25 D

B. Oxidation number

C. Both A. & B.

D. Neither A. nor B.

A. Decreasing its temperature

C. Diluting the solution

D. Increasing the volume of the vessel containing the solution

B. Film co-efficient for vaporisation decreases as a result of vapor binding

C. In industrial practice, sub-cooling of condensate is required, when the condensate is a volatile

D. ch is higher</strong>

E. uid and is to be transferred for storage

F. The condensing film co-efficient is about 3 times lower for vertical condenser as compared to the equivalent horizontal condenser for identical situation

A. CH4

C. CO2

D. H2S

B. Regulate the vapor flow

C. Vent the non-condensable gases

D. Create vacuum

B. ving force in the section</strong>

C. The size of the exchanger in which heat transfer rate is 1 kcal/hr

D. Both A. and B.

E. None of these

B. None of these

C. 100

D. 3

A. Phase change in case of a pure fluid at a given pressure from liquid to vapor or vice-versa occurs at saturation temperature

B. The controlling resistance in case of heating of air by condensing steam is in the air fil

D. The log mean temperature difference (LMTD) for counter flow and parallel flow can be theoretically same when any one of the fluids (hot or cold fluid) passes through the heat exchanger at constant temperature

E. rply, when a temperature cross occurs</strong>

A. There exists an unsteady state

C. The heat capacity is not constant and there is a phase change

D. Heat transfer co-efficient over the entire heat exchanger is not constant

B. In flash (equilibrium) distillation, a definite fraction of liquid is vaporised in such a way that the evolved vapour & residual liquids are in equilibrium with each other

C. In differential (simple) distillation, the vapour is removed as soon as it is formed without appreciable condensation

D. Distillation under vacuum is a substitute for steam distillation

A. Heat capacities of gases

B. Activation energy

C. Molal heat capacities of gases

A. Component molecules are non-polar and no chemical combination or molecular association

B. ween unlike molecules takes place in the formation of the solution

D. Attractive forces between like and unlike molecules are approximately equal

E. Sizes of the component molecules are approximately equal

A. Bypassing

C. Recirculation

D. Recycling

B. None of these

C. Plancks

D. Stefan-Boltzmanns

A. Roof of open hearth furnace

C. Gas producer

D. Cupola

A. Inversely

B. Negligibly

C. Exponentially

A. Poor resistance to the penetration of molten slag, metal & flue gases

C. Better thermal spalling resistance

D. Poor heat conductivity & low strength

A. 566

C. 141.5

D. 283

A. 10

B. 1000

C. 100