Di, opt = 3 Q0.36 ρ0.18
Di, opt = 3.9 Q0.45 . ρ0.23
Di, opt = 7.6 Q0.36 . ρ0.9
Di, opt = 3 Q0.36 . ρ1.86 μ0.08
✅ The correct answer is option A.
Process Equipment and Plant Design MCQs
62. Joint efficiency (J) for a seamless pipe is
1
0.85
1.2
< 0.5
✅ The correct answer is option A.
63. For a given fluid, as the pipe diameter increases, the pumping cost
decreases.
increases.
remains unaffected.
may increase or decreaes depending upon whether the fluid is Newtonian or non-Newtonion.
✅ The correct answer is option A.
64. Which of the following material is seldom used for pressure vessel construction ?
Rimmed still
Mild steel
Killed steel
Semi-killed steel
✅ The correct answer is option A.
65. The operating velocity in the absorption tower is usually 40-50% of the flooding velocity. Packed absorption towers are normally designed for a pressure drop of about __________ mm of water column per metre height of packing.
1-May
20-40
100-150
1000-1500
✅ The correct answer is option B.
66. In inclined long tube vertical evaporators, the tubes are inclined at an angle of
15°
90°
45°
60°
✅ The correct answer is option C.
67. Normally, the plate thickness of the bottoms and roofs of vertically cylindrical storage vessels as compared to that of the cylindrical shell is
more
less
same
more or less depending upon the pressure & temperature inside the vessel and the nature of the fluid contained therein.
✅ The correct answer is option B.
68. The thickness of heat transfer plates used in the plate type heat exchanger ranges from __________ mm, pressed in a single piece provided with grooves & corrugations.
0.3 to 0.8
1.25 to 3.125
3.5 to 7.0
8-Dec
✅ The correct answer is option B.
69. The ideal size of round bubble caps to be used in industrial distillation column having a diameter of 3-6 metres is __________ cms.
5
15
7.5
50
✅ The correct answer is option B.
70. Ponchon Savarit method is based on the use of enthalpy concentration diagram, which contains the bubble point curve (saturated liquid curve), dew point curve (saturated vapour curve) and equilibrium tie lines. As compared to McCabe-Thiele’s method, this method
is more accurate in finding the number of equilibrium stages.
accounts for the enthalpy changes in the process.
facilitates direct calculation of heat load on reboiler & condenser from, the diagram used in this method.
all ‘a’, ‘b’ & ‘c’.
✅ The correct answer is option D.