For the non catalytic reaction of particles with surrounding fluid, the same needed to achive the same fractional conversion for particles of different unchanging sizes is proportional to the particle diameter, when the __________ is the controlling resistance.

For the non-catalytic reaction of particles with surrounding fluid, the time needed to achieve the same fractional conversion for particles of different but unchanging sizes is proportional to the square of particle diameter, when the __________ is the controlling resistance.

A

Film diffusion

B

Diffusion through ash layer

C

Chemical reaction

D

Either A, B or C

Which one of the following is the correct sequence of various stages of operating cycle of a manufacturing company? 1. Raw material conversion period, work-in-progress conversion period, Finished goods conversion period, Receivables conversion period 2. Raw material conversion period, work-in-progress conversion period, Creditors payment period, Receivables conversion period 3. Creditor payment period. Raw material conversion period, Receivables conversion period, work-in- progress conversion period 4. Raw material conversion period, Finished goods conversion period, work-in- progress conversion period. Receivables conversion period

A

1

B

2

C

3

D

4

The time needed to achieve the same fractional conversion for particles of different sizes (d) when chemical reaction controls, is proportional to

A

d

B

$$\sqrt {\text{d}} $$

C

d^1.5

D

d²

Consider the following statements: 1. If x is directly proportional to z and y is directly proportional to z, then (x2 - y2) is directly proportional to z2. 2. If x is inversely proportional to z and y is inversely proportional to z, then (xy) is inversely proportional to z2. Which of the above statements is/are correct?

A

1 only

B

2 only

C

Both 1 and 2

D

Neither 1 nor 2

Consider the following statement: a) In the refrigerator the temperature of the system is more than the surrounding b) In the refrigerator the temperature of the system is less than the surrounding c) In the heat pump the temperature of the system is more than the surrounding d) In the heat pump the temperature of the system is less than the surrounding Which of the above statements is CORRECT?

A

Both a and c are correct

B

Both a and d are correct

C

Both b and c are correct

D

Both b and d are correct

The mass of particle A is double the mass of particle B and the charge on both the particles is equal. If both the particles are moving perpendicular to the magnetic field B with equal speed, then the ratio of the magnetic force on particle A to particle B will be:

A

1 : 1

B

1 : 2

C

2 : 1

D

1 : 4

__________ is the controlling step in a highly temperature sensitive fluid-solid non-catalytic reaction.

A

Gas film diffusion

B

Ash diffusion

C

Chemical reaction

D

None of these

Bernoulli's equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli's equation?
1. Fluid flow is frictionless & irrotational
2. Fluid flow is steady
3. Fluid flow is uniform & turbulent
4. Fluid is compressible
5. Fluid is incompressible

A

1, 3, 4

B

2, 4, 5

C

1, 2, 5

D

1, 4, 5

For mixed flow of a mixture of sizes of unchanging size particles, the mean residence time of a material of a given size is ____

A

t = $\frac{Weight \, of \, all \, solids \, in \, the \, reactor}{Feed \, rate \, of \, solids \, to \, the \, reactor} $

B

t = $\frac{Feed \, rate \, of \, solids \, to \, the \, reactor}{Weight of all solids in the reactor} $

C

t = $\frac{Weight \, of \, all \, solids \, in \, the \, reactor}{Reactant \, concentration} $

D

t = $\frac{Reactant \, concentration}{Weight \, of \, all \, solids \, in \, the \, reactor} $

How is the degree of emulsion polymerization related to the monomer concentration, and the rate of radical generation, Ri? , inversely proportional to Ri b) inversely proportional to Ri, directly proportional to . c) directly proportional to Ri, independent of . d) directly proportional to , independent of Ri

A

and the rate of radical generation, Ri? ] directly proportional to , inversely proportional to Ri

B

M

C

M

D

M

For the non catalytic reaction of particles with surrounding fluid, the same needed to achive the same fractional conversion for particles of different unchanging sizes is proportional to the particle diameter, when the __________ is the controlling resistance.

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