In case of a vertical tube evaporator, with increase in the liquor level, the ____________ is increased?

Related Mcqs:

1. In case of a vertical tube evaporator, with increase in the liquor level, the___________________?

   A. Capacity of the evaporator is decreased
   B. Capacity of the evaporator is increased
   C. True temperature drop increases
   D. Both B. and C.

2. In case of vertical tube evaporator, with increase in liquor level, the overall heat transfer co-efficient______________?

   A. Increases
   B. Decreases
   C. Is not affected
   D. May increase or decrease; depends on the feed

3. The inside heat transfer co-efficient in case of turbulent flow of liquid in the tube side in a 1-2 shell and tube heat exchanger is increased by ______________ times, when the number of tube passes is increased to 8?

   A. 20.8
   B. 40.8
   C. 40.4
   D. 20.4

4. Increasing the liquor level in the evaporator results in the_______________?

   A. Decreased capacity
   B. Increase in liquor film co-efficient
   C. Decreased effect of hydrostatic head
   D. Increased true temperature drop

5. Steam consumption in kg/hr in case of an evaporator is given by (where, C & E are capacity the economy of the evaporator respectively) ?

   A. C/E
   B. E/C
   C. CE
   D. 1/CE

6. Intermittent tube cleaning is possible to be done in case of a _____________ evaporator?

   A. Basket type
   B. Horizontal tube
   C. Calandria

   D. None of these

7. Steam is routed through the tube in case of a ______________ evaporator?

   A. Basket type
   B. Horizontal tube
   C. Short tube vertical
   D. Long tube vertical

8. For the same heat load and mass flow rate in the tube side of a shell and tube heat exchanger, one may use multipass on the tube side, because it__________________?

   A. Decreases the pressure drop
   B. Decreases the outlet temperature of cooling medium
   C. Increases the overall heat transfer coefficient
   D. None of these

9. Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is________________?

   A. Finned tube heat exchanger with air inside and steam outside
   B. Finned tube heat exchanger with air outside and steam inside
   C. Shell and tube heat exchanger with air inside tubes and steam on shell side
   D. Shell and tube heat exchanger with air on shell side and steam inside tubes

10. In a shell and tube heat exchanger, the tube side heat transfer co-efficient just at the entrance of the tube is_________________?

    A. Infinity
    B. Zero
    C. Same as average heat transfer co-efficient for tube side
    D. None of these