Compensation against openings in process vessels for giving inlet and outlet connections, for providing sight glasses and manholes etc. is provided for strength and rigidity. The most efficient type of compensation is of _______________ type?

Related Mcqs:

1. A certain pressure vessel manufacturer avoids doing reinforcements calculations for openings by always providing a reinforcing pad extending upto double the diameter of the opening and of the same material and thickness as that of the shell wall. If area compensation is accepted as a code guideline, his approach leads to safe design____________________?

   A. Only if the opening is on spherical vessel
   B. Only if the opening is on a vertical cylindrical vessel
   C. Only if the opening is on a horizontal cylindrical vessel
   D. Irrespective of the shape of the vessel

2. The function of manholes provided in the shell of a distillation column is to __________________?

   A. Keep a check on the liquid gradient over the plate by direct visual observation
   B. Give access to the individual trays for cleaning, maintenance and installation
   C. Guard against foaming & entrainment by dumping antifoaming agent through it
   D. All A., B. and C.

3. Overall mass transfer co-efficient in case of absorption of __________ in water is based on the gas film co-efficient only, as the mass transfer process is gas film (phase) controlling ?

   A. CO2
   B. SO2
   C. NH3
   D. None of these

4. In hydrostatic testing of welded pipe (for leakage, strength etc.) the ratio of minimum hydrostatic test pressure to internal design pressure is around __________________?

   A. 0.5
   B. 1.5
   C. 2.5
   D. 3.5

5. Lug support is meant for supporting _______________ vessels?

   A. Large horizontal cylindrical
   B. Tall but empty
   C. Small
   D. Thick walled tall

6. In a pressure vessel containing multiple openings of various dimensions at different parts, stress concentration at the edges of the opening is maximum which becomes negligibly small beyond the area covered by ______________ times the hole diameter?

   A. Two
   B. Five
   C. Ten
   D. Twenty

7. Elastic failure of a material occurs, when the tensile stress equals yield strength, yield point or the elastic limit. Also, the elastic failure occurs according to maximum strain theory, when the maximum tensile strain equals (where, ζ = yield strength and E = modulus of elasticity) ?

   A. E
   B. ζ
   C. ζ/E
   D. E/ζ

8. Large process vessels operating under extreme temperature and pressure conditions are normally clad/ lined with materials like stainless steel, aluminium, nickel & its alloys, copper & its alloys and titanium. The cladding thickness is generally about ______________ percent of the total thickness?

   A. 1 to 5
   B. 10 to 20
   C. 30 to 40
   D. 40 to 50

9. For high pressure process equipments/vessels, the connected nozzle should be____________________?

   A. Welded
   B. Screwed
   C. Flanged
   D. Brazed

10. ______________ closure is the weakest enclosure for cylindrical vessels?

    A. Hemispherical
    B. Torispherical
    C. Conical or flat plate
    D. Elliptical