Q.1
Baffle spacing is generally __________ the I.D. of the shell.
Q.2
Pick out the wrong statement
Q.3
Holes of a sieve tray are arranged in triangular pitch of __________ times the hole diameter.
Q.4
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.
Q.5
For storing hazardous chemicals in large storage tanks, the minimum safe distance between the two tanks should range between __________ times the tank diameter.
Q.6
In the design of a shell and tube heat exchanger, the corrosion allowance
Q.7
Cylindrical storage tanks used for the storage of volatile liquids (e.g., naphtha) have __________ roofs.
Q.8
The absorption factor is defined as (where, S₁ = slope of the equilibrium curve, S₂ = slope of the operating line)
Q.9
A cylindrical storage tank can have a self supported conical roof,
Q.10
A stuffing box is used for
Q.11
In a shell and tube heat exchanger, tube side __________ of the mass velocity.
Q.12
In case of 1.5" heat exchanger tubes, the inside flow area __________ with decrease in BWG.
Q.13
Baffle width is normally taken as __________ times the tank diameter.
Q.14
In case of saddle packing (e.g., berl and intralox saddles), the maximum size of the packing should not exceed __________ of the column diameter.
Q.15
Pick out the wrong statement.
Q.16
In a vertical short tube evaporator (Calendria type), the
Q.17
In the case of a shell and tube heat exchanger, the logarithmic mean temperature difference
Q.18
The dust collection efficiency of a cyclone separator
Q.19
The LMTD correction factor (FT) is applied in __________ heat exchangers.
Q.20
In condenser, the cooling water is passed in the tube side in a pass arrangement, because
Q.21
For identical situation, condensing film coefficient in case of a horizontal condenser is almost __________ the value expected in case of vertical condenser.
Q.22
A perforated plate has holes of diameter dh arranged in a pitch ph. Each hole has a tube of I.D. dt passing through it. The ligament efficiency is given by
Q.23
An adequate clearance between the tray and the shell wall of a distillation column is provided to
Q.24
Pick out the correct statement.
Q.25
Pick out the correct statement.
Q.26
In case of a shell and tube heat exchanger, the minimum shell thickness for carbon steel (inclusive of corrosion allowance) depends on shell diameter and is in the range of __________ mm.
Q.27
Cooling water fouling factors vary in the range of 0.001 to 0.003
Q.28
Power required for agitation depends upon the
Q.29
Pick out the wrong statement pertaining to the design of the distillation column.
Q.30
The safe height (h) to diameter (d) ratio (i.e., h/d) for liquid/petro fuel storage tank of capacity more than 45 kilolitres is less than
Q.31
Which of the following is the most common type of baffle used in industrial shell and tube heat exchanger?
Q.32
The safe distance of habitation from a hazardous chemical plant (TLV of its product < 1000 ppm) should be about __________ kms.
Q.33
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
Q.34
Pick out the wrong statement.
Q.35
Back-trapping in a distillation column results due to
Q.36
In a continuous distillation column, the optimum reflux ratio ranges from __________ times the minimum reflux ratio.
Q.37
Which of the following efficiencies can be greater than 100%?
Q.38
With increase in the number of shell passes, the value of FT
Q.39
Pick out the wrong statement about the design of a sieve plate column.
Q.40
Which of the following types of reactors is the safest from operation point of view?
Q.41
A/an __________ is used for changing the direction of a pipeline.
Q.42
Pressure differential maintained across a continuous rotary vacuum filter is in the range of __________ mm Hg column.
Q.43
At equal mass velocities, the values of film co-efficients for gases as compared to that for liquids are generally.
Q.44
Frame thickness in the plate and frame filter press is normally in the range of __________ inches.
Q.45
Rotary driers are most economically designed for the number of heat transfer units (HTU) from
Q.46
In a double pipe concentric heat exchanger, the equivalent diameter of annulus for heat transfer would be (where, D₁ and D₂ are I.D. of inner and outer pipes)
Q.47
The ratio of down take area to cross-sectional area of the tube, for calendria type evaporator ranges from
Q.48
The difficulty of liquid distribution in packed towers is accentuated, when the ratio of tower diameter to packing diameter is
Q.49
Smaller sized packings are generally dumped to the packed columns, and the large ones of size greater than __________ mm are stacked individually, which provides better control over bed porosity and offers lower gas pressure drop.
Q.50
In a multipass shell and tube heat exchanger, the shell side cross flow area does not depend upon
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