38651. Overall tray efficiency of a distillation column is the ratio of the number of
38652. Pick out the wrong statement about the design of a sieve plate column.
38653. Generally, no corrosion allowance in wall thickness of a part is required, if the thickness is more than __________ mm.
38654. Multiple blade paddle agitator is used for mixing high viscosity liquids/paste in which the paddle diameter is commonly 0.8 times the tank diameter. However, the width of the blade is in the range of __________ times the paddle diameter.
38655. In a __________ rivetted joint, the rivets in the various rows are opposite to each other.
38656. The Panchayat Raj was introduced in India in:
38657. Generally, elliptical dished heads
38658. Pick out the wrong statement pertaining to the comparative evaluation of performance of the packed tower and the plate tower.
38659. The circumferential (hoop) stress in a thin walled cylinderical vessel under internal pressure is
38660. for fully open gate valves would be
38661. LMTD correction factor is used in heat exchanger design for
38662. Floating head heat exchangers are used for the
38663. The most common standard size of bubble caps used in industrial operation is
38664. Compensation against openings in process vessels for giving inlet and outlet connections, for providing sight glasses and manholes etc. is provided for strength and rigidity. The most efficient type of compensation is of __________ type.
38665. In case of a continuous distillation column, increase in reflux ratio may result in the
38666. In a distillation column, the minimum residence time for liquid in the downspout is about __________ seconds.
38667. Thickness of the frame of a plate and frame filter as compared to that of plates is
38668. Which of the following factors affect the pressure drop in a co-current gas-liquid absorption packed tower ?
38669. 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.
38670. Rivets are generally specified by the
38671. Length to diameter ratio of most rotary driers is in the range of
38672. Tube wall thickness depends on the cor-rosiveness of the fluids and their operating pressure & temperature and is specified by Birmingham wire gauge (B.W.G)-a number which varies from 8 to 18 with the numbers 14 and 16 being more commonly used. Outside diameter of tubes varies from about 15 to 50 mm; however a tube of less than __________ mm outside diameter is generally not recommended for fouling fluids.
38673. Angled baffles are preferred in the agitation tank to control the swirling action; if the viscosity of the liquid to be mixed is about 200 poise. However, the baffle may be completely eliminated for mixing liquids having viscoisty above __________ poise.
38674. Ratio of tube length to shell diameter for a shell and tube heat exchanger is
38675. The dust collection efficiency of a cyclone separator
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