Statement 1: Filter cake increases the efficiency of filtration. Statement 2: Filter aid is added to the filter cake when the filter cake is the desired product.

Five cakes in a shop are placed in a row on a shelf. Cake T is to the immediate left of Cake R and to the immediate right of Cake U. Cake M is to the right of Cake R. Cake B is the neighbour of Cake R and Cake M. Which cake is placed in the middle of the shelf?

A

Cake T

B

Cake R

C

Cake M

D

Cake B

Filter aids like asbestos, kieselguhr, diatomaceous earth etc. are used to increase the porosity of the final filter cake & reducing the cake resistance during filtration. Filter aid is

A

Added to the feed slurry

B

Precoated on the filter medium prior to filtration

C

Separated from the cake by dissolving solids or by burning it off

D

All of the above

Filter aids like asbestos, kieselguhr, diatomaceous earth etc. are used to increase the porosity of the final filter cake & reducing the cake resistance during filtration. Filter aid is

A

Added to the feed slurry

B

Precoated on the filter medium prior to filtration

C

Separated from the cake by dissolving solids or by burning it off

D

All of the above

A rotary drum filter with 30% submergence is used to filter concentrated aqueous slurry of calcium carbonate containing 15lb of solids per cubic foot of water. The pressure–drop is 2011Hg. If the filter cake contains 50% mixture (wet basis), calculate the filter area required to filter 10 gal/min of slurry. The filter cycle time is 5 min. The specific cake resistance depends on the pressure–drop as: α (ft/lb) = α (Δp)0.26, where α = 2.90×1010 Viscosity of the filtrate = 6.72×10-4 lb/ft-s. Density of calcium carbonate = 168.8 lb/ft3. Neglect filter medium resistance.

A

≅ 88 ft2

B

= α (Δp)0.26, where α = 2.90×1010 Viscosity of the filtrate = 6.72×10-4 lb/ft-s. Density of calcium carbonate = 168.8 lb/ft3. Neglect filter medium resistance. a) ≅ 88 ft2 [ ≅ 86 ft2

C

≅ 82 ft2

D

≅ 90 ft2

The cake resistance increases steadily with the time of filtration in a plate and frame filter employing constant __________ filtration.

A

Rate

B

Pressure

C

Both A & B

D

Neither A nor B

The cake resistance increases steadily with the time of filtration in plate and frame filter employing constant________ filtration.

A

Rate

B

Temperature

C

Flow

D

Density

Which of the following statement (s) is/are true about the following eliminations? (1) Hoffmann product is major product in I (2) Saytzeff product is major product in I (3) Hoffmann product is major product in II (4) Saytzeffproduct is major product in II

A

1 and 2

B

1 and 4

C

2 and 3

D

3 and 4

Naina brought a cake weighing 5 kg 675 g. Cake is distributed among 12 children and each get 215 gram of cake. What quantity of cake is left?

A

3 kg 995 g

B

4 kg 995 g

C

3 kg 95 g

D

4 kg 95 g

In each of the following question below are given some statements followed by some conclusions. Taking the given statements to be true even if they seem to be at variance from commonly known facts, read all the conclusions and then decide which of the given conclusion logically follows the given statements. Statements: I. All cake are pastry. II. All pastry are cream. Conclusions: I. Some cream are cake. II. Some cake are not cream. III. Some pastry are cake.

A

Only conclusion (III) follows

B

Only conclusion (I) and (II) follow

C

Only conclusion (I) and (III) follow

D

All conclusions follow

A foil is to be put as shield over a cake (circular) in a shape such that the heat is even along any diameter of the cake. Given that the heat on cake is proportional to the height of foil over cake, the shape of the foil is given by

A

f(x, y) = sin(y/x)x2 + xy

B

f(x, y) = x2 + y3

C

f(x, y) = x2y2 + x3y3

D

not possible by any analytical function

Statement 1: Filter cake increases the efficiency of filtration. Statement 2: Filter aid is added to the filter cake when the filter cake is the desired product.

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