Related Mcqs:

1. When the feed to a distillation column is a saturated liquid, slope of the feed line is_____________________?

   A. Zero
   B. Unity
   C. Infinity
   D. None of these

2. The feed to fractionating column is changed from saturated vapour to saturated liquid. If the separation and reflux ratio remains unchanged, the number of ideal stages will______________________?

   A. Increase
   B. Decrease
   C. Remain same
   D. Depend on saturated boiling point; may increase or decrease

3. If f = moles of vapour present per mole of feed, then the slope of feed line is (McCabe- Thiele method) ________________________?

   A. (1 – f)/f
   B. – (f – 1)/f
   C. -1/f
   D. -f/(1 – f)

4. In distillation where q is defined as the moles of liquid flow in the stripping section per mole of feed introduced, for saturated liquid feed____________________?

   A. q > 1
   B. q < 1
   C. q = 1
   D. q = 0

5. Absorption factor is defined as (where, S1 = slope of the operating line S2 = slope of the equilibrium curve) ____________________?

   A. S2/S1
   B. S1/S2
   C. S1 – S2
   D. S1 × S2

6. If G = insoluble gas in gas stream and L = non-volatile solvent in liquid stream, then the slope of the operating line for the absorber is___________________?

   A. L/G
   B. G/L
   C. Always < 1
   D. None of these

7. _____________ is the temperature at which a gas-vapor mixture becomes saturated, when cooled at constant total pressure out of contact with a liquid ?

   A. Dew point
   B. Bubble point
   C. Dry bulb temperature
   D. Wet bulb temperature

8. In a binary distillation column, if the feed contains 40 mole % vapour, the q line will have a slope of_________________?

   A. 1.5
   B. -0.6
   C. -1.5
   D. 0.6

9. The assumption made in Elis method in distillation is that enthalpy concentration lines of vapor and liquid are __________________?

   A. Parallel
   B. Straight
   C. Both parallel and straight
   D. Neither parallel nor straight

10. The following plot gives the saturated humidity (He) versus temperature (T).Line joining (H1, T1) and (H2, T2) is the constant enthalpy line. Choose the correct one from among the alternatives A, B, C and D____________________?

    A. T1-Dew point temp; T2-Dry bulb temp; T3-Wet bulb temp
    B. T1-Dew point temp; T2-Wet bulb temp; T3-Dry bulb temp
    C. T1-Wet bulb temp; T2-Dry bulb temp; T3-Dew point temp
    D. T1-Dry bulb temp; T2-Wet bulb temp; T3-Dew point temp