A. Small diameter tanks
B. Large diameter tanks
C. Small diameter tall tanks
D. All tanks irrespective of their heights and diameters
Related Mcqs:
- _____________ shaped roof is the most commonly used roof for cylindrical storage tanks?
A. Conical
B. Flat
C. Dome
D. Umbrella - A cylindrical storage tank can have a self supported conical roof ?
A. If its diameter is less than 15-20metres
B. If its diameter is more than 50 meters
C. If the thickness of the roof is more than that of the cylindrical shell
D. Irrespective of its diameter - For a cylindrical vessel of moderate height, the weld joint efficiency for joints parallel to the cylindrical axis is given as 1.0; while for joints along the girth (circumference) it is given as 0.8. In calculating the shell wall thickness using code formula for an internally pressurised cylindrical vessel, what value of weld joint efficiency should be used ?
A. 0.8
B. 0.9
C. 1.0
D. (0.8)0.5 - Normally, the plate thickness of the bottoms and roofs of vertically cylindrical storage vessels as compared to that of the cylindrical shell is____________?
A. More
B. Less
C. Same
D. More or less depending upon the pressure & temperature inside the vessel and the nature of
the fluid contained therein - Cylindrical storage tanks used for the storage of volatile liquids (e.g., naphtha) have ______________ roofs?
A. Conical
B. Flat
C. Floating
D. Fixed - _______________ shaped roof is most commonly used for cylindrical tanks ?
A. Cone
B. Dome
C. Umbrella
D. Flat - Overall distillation column efficiency for most of the refinery columns can be given by (for μ = 0.07 – 1.4 cp and relative volatility < 4) (where ε = overall column efficiency, % μ = molal average viscosity of feed at average column temperature and pressure, cp Δp = pressure drop per tray, psi) ?
A. η = 17 – 61.1 log μ
B. η = 24.6 (Δp/μ)
C. η = 1.66 – 0.25 log μ
D. η = 0.25 log μ – 1.67 - Any shell opening greater than 5 cms for a storage tank must be reinforced for reason of ____________________?
A. Preventing the local overstressing of the shell around the opening
B. Reduction of discontinuity in shape at the junction
C. Making the joint leak proof
D. None of these - In packed towers provided with pall rings liquid redistributors are positioned at heights of every 6 metres or 5-10 times the column diameter, whichever is less. Maximum size of the pall rings should not exceed _______________________ of the column diameter?
A. 1/10-1/15th
B. 1/5-1/10th
C. 1/20-1/30th
D. 1/2 to 1/4th - For a cylindrical shell, (subject to the thickness of uppermost course being more than the minimum for dia of the tank in question), the thickness of the courses of shell_________________?
A. Decreases upwards
B. Increases upwards
C. Remains same throughout
D. May decrease or increase upwards depending upon whether vacuum or positive pressure
would be maintained inside the shell
