Basic Chemical Engineering Mock Test 6

10%

Question 1 of 10

1. What is the molal saturation of a gas with 10 moles of gas vapor and 25 moles of dry gas?

0.2

0.8

0.4

Question 1 of 10

Question 2 of 10

2. What is the mass of water vapor, if the mass of dry gas is 10 lb and humidity 10%?

1 Kg

453 g

254 g

746 g

Question 2 of 10

Question 3 of 10

3. What is the relative humidity of a gas with a partial pressure of water vapor is 5 mm Hg and vapor pressure 8 mm Hg?

32.5%

45%

62.5%

25%

Question 3 of 10

Question 4 of 10

4. At triple point, vapor pressure of ice is given by ln p* = 18 – 2560/T, and vapor pressure of water is given by ln p* = 28 – 5120/T, what is the temperature at triple point?

320 K

225 K

256 K

400 K

Question 4 of 10

Question 5 of 10

5. A process is carried out for the feed mixture of 40% air and 60% oxygen, the compressor recovered 2% of oxygen, what is the exit pressure of the compressor, if the partial pressure of oxygen vapor is 5 mm Hg?

6.5 mm Hg

2.4 mm Hg

8.4 mm Hg

4.8 mm Hg

Question 5 of 10

Question 6 of 10

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

Less than 1

Cannot say

Equal to 1

Greater than 1

Question 6 of 10

Question 7 of 10

7. A process is carried out for the feed mixture of 95% air and 5% ammonia vapor, the compressor recovered 40% of ammonia, what is the exit pressure of the compressor, if the partial pressure of ammonia vapor is 10 mm Hg?

451.2 mm Hg

593.5 mm Hg

225.4 mm Hg

326.8 mm Hg

Question 7 of 10

Question 8 of 10

8. 1 mole glucose reacts completely with excess air, if 25 liter of bone dry air is produced at 27^oC and 5 atm, what is the humidity?

160%

80%

120%

40%

Question 8 of 10

Question 9 of 10

9. What is the degrees of freedom of a system with a mixture of water, liquid benzene and oxygen?

Question 9 of 10

Question 10 of 10

10. What is the molal humidity of a gas with partial pressure with vapor 1 mm Hg and partial pressure without vapor 1 atm?

214%

131%

90%

288%

Question 10 of 10