| 1. | Which of the following T-H diagram is valid for dehumidification operation ?
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| a. | A |
| b. | B |
| c. | C |
| d. | D |
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Answer: (a).A
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| 2. | If f = moles of vapour present per mole of feed, then the slope of feed line is (Mcabe-Thiele method)
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| a. | A |
| b. | B |
| c. | C |
| d. | D |
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Answer: (c).C
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| 3. | The diffusivity (D) in a binary gas mixture is related to the pressure (P) as
 |
| a. | A |
| b. | B |
| c. | C |
| d. | D |
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Answer: (c).C
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| 4. | In gas-liquid contact operation, the number of ideal stages N is given by following equation. This is true when the stripping factor 'S' is
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| a. | S > 1 |
| b. | S < 1 |
| c. | S = 1 |
| d. | S = ∞ |
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Answer: (a).S > 1
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| 5. | In a vapor-liquid contacting equipment, the overall gas phase mass transfer co-efficient (M.T.C), KG is related to individual co-efficients (KG and KL) as
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| a. | A |
| b. | B |
| c. | C |
| d. | D |
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Answer: (b).B
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