axial tensile stress in the pipe.
forces exerted by static and dynamic action at bends.
circumferential pipewall tension.
temperature stresses.
✅ The correct answer is option C.
Chemical Engineering MCQs
25 per cent cut segmental baffle means that the baffle
height is 75% of the I.D. of the shell.
height is 25% of the I.D. of the shell.
spacing is 75% of its height.
width is 25% of its height.
✅ The correct answer is option A.
In a vertical short tube evaporator (Calendria type), the
tube dia of 2.5-7.5 cms, tube length of 75-200 cms and cylinderical drum dia of 1-6 metres are normally used.
area of central downtake is equal to 40 to 100% of total cross-sectional area of the surrounding tube.
liquor is inside the tube while the steam is outside the tube.
all (a), (b) & (c).
✅ The correct answer is option D.
Lug support is
the most suitable for thick vertical vessel.
same as bracket support.
provided usually for vessels of much smaller height than skirt supported vessels.
all (a), (b) and (c).
✅ The correct answer is option D.
The testing pressure of storage tanks and pressure vessels designed as per Indian standard codes should be about __________ times.the design pressure.
1.5 to 2
3 to 4
4 to 5
>5
✅ The correct answer is option A.
Minimum tube pitch recommended for shell and tube heat exchangers is about __________ times the outside diameter of the tube.
1.25
1.75
2.5
3.5
✅ The correct answer is option A.
Height equivalent to a theoretical plate (HETP) is the height of packing that will give the same separation as one theoretical plate in gas-liquid mass transfer operations like distillation, absorption/stripping and humidification/dehumidification. HETP which is experimentally determined, depends upon the
flow rates of each fluid.
type and size of packing.
concentration of each fluid.
all a, b & c.
✅ The correct answer is option D.
Which of the following is the best tube material from thermal conductivity point of view alone?
Aluminium
Stainless steel
Copper
Carbon steel
✅ The correct answer is option C.
Cooling water fouling factors vary in the range of 0.001 to 0.003
(BTU/hr.ft2 . °F)-1
(kcal/hr.m2 .°C)-1
(W/m2.°K)-1
(kcal/hr. m. °C)-1
✅ The correct answer is option A.
Stage efficiency for packed tower varies with the
type & size of packing.
fluid rates and fluid properties.
operating pressure and column diameter.
all (a), (b) and (c).
✅ The correct answer is option D.