# Multiple choice question for engineering

## Set 1

1. A batch process is that in which material enters the system and _____ which of the following should fill the gap?

a) Leaves

b) Does not leaves

c) Half of it leaves

d) None of the mentioned

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2. A semi-batch process is that in which material enters the system and _____ which of the following should fill the gap?

a) Leaves

b) Does not leaves

c) Half of it leaves

d) None of the mentioned

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3. A semi-batch process differ from an open process in which of the following?

a) Input

b) Output

c) Generation

d) Consumption

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4. A semi-batch process differ from a closed process in which of the following?

a) Input

b) Output

c) Generation

d) Consumption

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5. Tap filling a jar with water is an example of which of the following process?

a) Batch

b) Semi-batch

c) Neither of them

d) Batch & Semi-batch

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6. Water flowing in plants from tap through a pipe, the process is an example of which of the following process?

a) Batch

b) Semi-batch

c) Neither of them

d) Batch & Semi-batch

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7. Water boiling in a container is an example of which of the following?

a) Batch

b) Semi-batch

c) Neither of them

d) Batch & Semi-batch

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8. Two reactants enters a vessel and a reaction is carried out, it is an example of which of the following?

a) Batch

b) Semi-batch

c) Neither of them

d) Batch & Semi-batch

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9. In a batch process, 70 Kg of H_{2}O and 10 Kg of NaOH and some other reactants enters the vessel, if 100 Kg of product leaves the vessel, what is the percentage of H_{2}O in the product?

a) 10%

b) 30%

c) 70%

d) 100%

### View Answer

_{2}O in the product = (70/100)*100 = 70%.

10. 10 Kg of oil is burnt in a container and taken off from the container if 1% of oil remains on the container wall, how much oil is taken off?

a) 8.9 Kg

b) 9 Kg

c) 9.9 Kg

d) 10 Kg

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11. In a batch process, 50 Kg of H_{2}O and 40 Kg of CO_{2} entered a vessel with some H_{2}O, if 100 Kg of product leaves the vessel, what is the percentage of H_{2}O in the product?

a) 10%

b) 30%

c) 60%

d) 80%

### View Answer

_{2}O in the product = (100 – 40)/100*100 = 60%.

12. In a batch process, 40 mole of O_{2} and 30 mole of CO_{2} entered a vessel with some CO_{2}, if 100 mole of product leaves the vessel, what is the percentage of O_{2} in the product?

a) 10%

b) 40%

c) 60%

d) 80%

### View Answer

_{2}O in the product = 40/100*100 = 40%.

13. In a batch process, 5 mole of H_{2} and 3 mole of CO_{2} entered a vessel with some CO_{2}, if 10 mole of product leaves the vessel, what is the percentage of H_{2} in the product?

a) 10%

b) 30%

c) 50%

d) 80%

### View Answer

_{2}in the product = 5/10*100 = 50%.

14. In a batch process, 2 mole of SO_{2} and 3 mole of CO_{2} entered a vessel with some SO_{2}, if 5 mole of product leaves the vessel, what is the percentage of SO_{2} in the product?

a) 10%

b) 20%

c) 40%

d) 50%

### View Answer

_{2}in the product = 2/5*100 = 40%.

15. In a batch process, 5 mole of SO_{2} and 3 mole of CO_{2} entered a vessel with some SO_{2}, if 10 mole of product leaves the vessel, what is the percentage of SO_{2} in the product?

a) 10%

b) 30%

c) 50%

d) 70%

### View Answer

_{2}in the product = (10 – 3)/10*100 = 70%.

## Set 2

1. What is the fraction of a gas in a system at partial pressure 1 mm Hg, if the 0.2 fraction of the same gas is at partial pressure 2 mm Hg and 0.3 fraction at partial pressure 3 mm Hg (Use Freundlich Isotherm)?

a) 0.1

b) 0.2

c) 0.3

d) 0.4

### View Answer

_{1}/y

_{2}= (p

_{1}/p

_{2})

^{n}, => 0.2/0.3 = (2/3)

^{n}=> n = 1, => 0.2 = k*2

^{1}= k = 0.1, => y = 0.1*1

^{1}= 0.1.

2. What is the fraction of a gas in a system at partial pressure 2 mm Hg, if the 0.2 fraction of the same gas is at partial pressure 8 mm Hg and 0.3 fraction at partial pressure 18 mm Hg (Use Freundlich Isotherm)?

a) 0.0125

b) 0.0250

c) 0.0375

d) 0.0450

### View Answer

_{1}/y

_{2}= (p

_{1}/p

_{2})

^{n}, => 0.2/0.3 = (8/18)

^{n}=> n = 2, => 0.2 = k*8

^{2}= k = 0.2/64, => y = 0.2/64*2

^{2}= 0.0125.

3. What is the fraction of a gas in a system at partial pressure 1 atm, if the 0.1 fraction of the same gas is at partial pressure 2 atm and 0.2 fraction at partial pressure 4 atm (Use Freundlich Isotherm)?

a) 0.01

b) 0.03

c) 0.05

d) 0.08

### View Answer

_{1}/y

_{2}= (p

_{1}/p

_{2})

^{n}, => 0.1/0.2 = (2/4)

^{n}=> n = 1, => 0.1 = k*2

^{1}= k = 0.1/2, => y = 0.1/2 = 0.05.

4. What is the fraction of a gas in a system at partial pressure 1 atm, if the 0.2 fraction of the same gas is at partial pressure 4 atm and 0.4 fraction at partial pressure 8 atm (Use Freundlich Isotherm)?

a) 0.1

b) 0.2

c) 0.4

d) 0.5

### View Answer

_{1}/y

_{2}= (p

_{1}/p

_{2})

^{n}, => 0.2/0.4 = (4/8)

^{n}=> n = 1, => 0.2 = k*4

^{1}= k = 0.2/4, => y = 0.2/4*1 = 0.05.

5. What is the fraction of a gas in a system at partial pressure 3 atm, if the 0.2 fraction of the same gas is at partial pressure 4 atm and 0.3 fraction at partial pressure 6 atm (Use Freundlich Isotherm)?

a) 0.1

b) 0.15

c) 0.2

d) 0.25

### View Answer

_{1}/y

_{2}= (p

_{1}/p

_{2})

^{n}, => 0.2/0.3 = (4/6)

^{n}=> n = 1, => 0.2 = k*4

^{1}= k = 0.2/4, => y = 0.2/4*3

^{1}= 0.15.

6. Which of the following is called for the adsorbing the molecules?

a) Adsorbate

b) Adsorbent

c) Absobate

d) None of the mentioned

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7. Which of the following adsorbs on the adsorbing surface?

a) Adsorbate

b) Adsorbent

c) Absobate

d) None of the mentioned

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8. Which of the following is called for the curves following isothermal adsorbtion?

a) Adsorbtion isotherm

b) Adsorbate isotherm

c) Adsorbent isotherm

d) Absorbent isotherm

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9. Which of the following is then property of adsorbtion isotherm?

a) Linear

b) Decreasing

c) Monotonous

d) None of the mentioned

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10. Which of the following satisfies the first derivative of adsorbtion isotherms?

a) Greater than 1

b) Less than 1

c) Equal to 1

d) Cannot say