Vent pipes are provided in a condenser to ________________?

Related Mcqs:

1. The equivalent diameter for the annulus of a double pipe heat exchanger, whose inner pipe has fins on the outside is ______________ compared to the same size pipes without fins?

   A. More
   B. Less
   C. Same
   D. Unpredictable

2. The main function of baffles provided in a shell and tube heat exchanger is to______________?

   A. Facilitate the cleaning of outer tube surface
   B. Enhance turbulence
   C. Hold the tubes in position
   D. All A , B & C

3. Which of the following accessories is provided in the vapor line of an evaporator for removing the entrained liquid ?

   A. Bleed point
   B. Vent
   C. Catchall
   D. Baffle

4. In a heat exchanger, floating head is provided to____________________?

   A. Facilitate cleaning of the exchanger
   B. Increase the heat transfer area
   C. Relieve stresses caused by thermal expansion
   D. Increase log mean temperature gradient

5. Baffles are provided in heat exchangers to increase the________________?

   A. Fouling factor
   B. Heat transfer area
   C. Heat transfer co-efficient
   D. Heat transfer rate

6. Steam traps are provided in steam carrying pipelines to_________________?

   A. Condense steam
   B. Release excess steam pressure by bleeding steam
   C. Remove condensate and inert gases
   D. None of these

7. Baffles are provided in heat exchangers to____________?

   A. Remove dirt
   B. Increase heat transfer rate
   C. Reduce vibrations
   D. Reduce heat transfer rate

   Submitted by: Faheem Zaman Dhaunroo

8. In case of a super-cooled solution, which is on the verge of crystallisation, the free energy of the solution as compared to that of the solid is ________________?

   A. More
   B. Less
   C. Same
   D. More or less; depends on the nature of solution

9. A sphere of radius ‘R1’ is enclosed in a sphere of radius ‘R2’. The view (or shape) factor for radiative heat transfer of the outer sphere with respect to the inner sphere is ________________?

   A. 0
   B. R2/(R1+R2)
   C. 1
   D. (R1/R2)2

10. Trap is used to remove ________________ from steam pipe lines?

    A. Steam
    B. Condensate
    C. Non-condensable
    D. None of these