3969. Nominal size of a pipe is an indication of its __________ diameter.
inner
outer
approximate
none of these
✅ The correct answer is option C.
3973. __________ shaped roof is most commonly used for cylindrical tanks.
Cone
Dome
Umbrella
Flat
✅ The correct answer is option A.
3939. For identical operating conditions, the pressure drop over __________ tray is the highest out of the following.
sieve
valve
counterflow
bubble cap
✅ The correct answer is option D.
3942. __________ is the determining factor for the number of bubble caps to be used per tray.
Permissible slot velocity
Tray diameter
Liquid load
Vapor load
✅ The correct answer is option A.
3947. Fresh water carrying pipelines in chemical industries are coloured with __________ color.
sea green
brown
yellow
red
✅ The correct answer is option A.
3952. Lap joints are preferred for plates having thickness __________ mm.
< 12.5
> 3
> 5
5-Oct
✅ The correct answer is option B.
3958. In a thin cylindrical shell, the hoop stress is __________ stress.
radial
circumferential tensile
compressive
longitudinal
✅ The correct answer is option B.
3963. Which of the following factors determine the amount of entrainment in a distillation column ?
Plate spacing.
Depth of liquid above the bubble cap slots.
Vapour velocity in the volume between the plates.
All (a), (b) and (c).
✅ The correct answer is option D.
3974. When one of the fluids is highly corrosive and has fouling tendency, it should
preferably flow inside the tube for its easier internal cleaning.
perferably flow outside the tube.
flow at a very slow velocity.
flow outside the tube, when the flow is counter-current and inside the tube when the flow is co-current.
✅ The correct answer is option A.
3940. Pick out the wrong statement pertaining to the design of a basket type evaporator.
It is used for high viscosity liquor having large rate of scaling.
The tube bundle is suspended on bracket.
There is no central downtake.
Downtake is formed by the annular space between the bundle and the shell.
✅ The correct answer is option A.