Q.1
In perforated plate towers, the
Q.2
A forced circulation long tube vertical evaporator as compared to the natural circulation evaporator
Q.3
The ratio of lateral strain to linear strain is termed as the
Q.4
__________ liquor is best handled in a long tube vertical evaporator.
Q.5
Pick out the wrong statement pertaining to the design of a long tube vertical evaporator.
Q.6
Oxygen carrying pipelines in chemical industries are coloured with __________ colour.
Q.7
Lug support is
Q.8
25 per cent cut segmental baffle means that the baffle
Q.9
Vertical vessels are not supported by
Q.10
The ends of a cylinderical vessel can be closed by a head, which can be one of the four shapes. For the same thickness, choose the one which can withstand the highest pressure.
Q.11
The ratio of volumes of the mixed reactor to the plug flow reactor (for identical feed composition, flow rate, conversion, and for all positive reaction orders) is always
Q.12
Correct use of 'factor of safety' is very important in equipment design. It is defined as the ratio of the
Q.13
The minimum plate spacing in most of the pertroleum refinery distillation columns (of dia > 3 ft) is normally __________ inches.
Q.14
Optimum economic pipe diameter for fluid flow is determined by the
Q.15
__________ tower is the most suitable gas-liquid contacting device involving highly corrosive fluids.
Q.16
Speed of the drum of the rotary vacuum filter normally ranges from __________ rpm.
Q.17
Weep holes provided in the plates of a distillation column
Q.18
Mc Cable Thiele method used for finding theoretical stages in a distillation column assumes that the
Q.19
With increase in gas flow rate to fabric surface area ratio (Nm³/hr/m² fabric surface area), the size & the cost of a bag filter
Q.20
Pick out the wrong statement pertaining to the comparative evaluation of performance of the packed tower and the plate tower.
Q.21
Pick out the wrong statement.
Q.22
The minimum tray spacing in distillation column of diameter less than 3 ft is normally __________ inches.
Q.23
A head comprises of straight flange section, corner torus, section and central dished section. Crown radius and knuckle radius in a head is related respectively to the
Q.24
In a cylinderical vessel subjected to internal pressure, the longitudinal stress σL and the circumferential stress, σh are related by
Q.25
A binary liquid azeotropic mixture has boiling point higher than either of the components, when it shows __________ deviation from Raoult's Law.
Q.26
The dust collection efficiency of electrostatic precipitator increases with increase in the
Q.27
A shell may by termed as thin if its thickness to diameter ratio is less than 0.1. The factor which can be neglected in the calculation of membrane stresses is
Q.28
The normal range of velocity of water in pipes is __________ m/sec.
Q.29
To avoid the tearing off the plate of an edge, the margin (i.e., the minimum distance from the centre of the rivet hole to the nearest edge of the plate) should be equal to
Q.30
The clearance between two tubes in a shell and tube heat exchanger is known as 'ligament', whose minimum value is __________ the outside diameter of the tube, but in no case it should be less than 4.5 mm.
Q.31
A binary liquid azeotropic mixture has boiling point lower than either of the components, when it shows __________ deviation from Raoult's Law.
Q.32
Vapor velocity in a distillation column for non-foaming mixture is in the range of __________ times the flooding velocity.
Q.33
The wall thickness of thin cylindrical shell with hemispherical ends is __________ that of the spherical ends.
Q.34
If 'D' is the inside diameter of the shell of a shell and tube heat exchanger, then the baffle spacing is usually in the range of
Q.35
The minimum baffle height should be
Q.36
For a cylinderical internally pressurised vessel, which of the following closure types would withstand highest pressure, if each closure is of the same material and thickness?
Q.37
Triangular pitch tube layout as compared to square pitch in a shell and tube heat exchanger
Q.38
__________ shaped roof is most commonly used for cylindrical tanks.
Q.39
The shell side pressure drop in a shell and tube heat exchanger is maximum for __________ baffle.
Q.40
Removable connection of tubes to tube sheet is called
Q.41
An underdesigned steam trap will
Q.42
In a double pipe (concentric) heat exchanger, the hydraulic radius for heat transfer (for a fluid flowing through the annulus) would be
Q.43
The approximate liquid depth in an agitation tank is equal to (where, d = tank diameter)
Q.44
The minimum shell thickness for tank ≤ 15 metres diameter is limited to __________ mm, for reasons of elastic stability.
Q.45
Diameter of rivet hole (d, mm) and the plate thickness (t, mm) are related by Unwin's formula as
Q.46
Minimum tube pitch recommended for shell and tube heat exchangers is about __________ times the outside diameter of the tube.
Q.47
Brass valves are usually made for pipe sizes __________ inches.
Q.48
Movement of pipeline caused by thermal expansion is taken care by providing
Q.49
What is the slope of the operating line in the stripping section of a distillation column?
Q.50
In shell and tube heat exchangers, straight tie rods are used to
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