A. Centre to centre distance between two consecutives rivets in a row is called the pitch
B. A riveted joint made in overlapping plates is called butt joint
C. Hole size drilled in riveted plates is less than the actual size of the rivet
D. None of these
Related Mcqs:
- Pick out the correct statement?
A. It is preferred to use a vertical condenser for condensation of vapor from a distillation column without sub-cooling
B. Draining of residual liquid on tray during shut down of distillation column is facilitated by weep holes
C. Random packing a packed tower offers the advantage of lower pressure drop and higher throughput of fluids as compared to regular/stacked packing
D. Risers are generally not connected to the plate in a distillation coloumn by bolts, rivets or welding - Pick out the correct statement ?
A. When highly corrosive fluids are to be handled, the plate towers prove to be cheaper and easier to construct than packed tower
B. Packed towers are generally preferred over plate towers, if the liquids have a foaming tendency
C. The pressure drop through the packed towers is generally more than the pressure drop through plate towers designed for same duty
D. None of these - Pick out the wrong statement?
A. If sufficient residence time (around 8 seconds) is not provided to the downcoming liquid in
the downcomer, it may entrain some vapour
B. The liquid head in the downcomer should not be greater than one half the plate spacing to
avoid flooding
C. The discharge end of the downcomer must project far enough into the tray liquid so that no
gas bubbles can enter the open end and by pass the bubble caps
D. None of these - Pick out the wrong statement pertaining to shell and tube heat exchanger_______________?
A. Clearance between shell & baffles and between tube & baffles should be minimum to avoid
by-passing of the fluid, but it should be enough to permit the removal of tube bundle
B. Baffles are supported independently of the tubes by tie rods and positioned by spacers
C. Tie rods are fixed at one end in the tube sheet by making blind holes and the minimum
number of tie rods is 4 with at least 10 mm diameter
D. Bracket supports are used for horizontal shell, while saddle support is used for vertical shell - Pick out the wrong statement?
A. Riveting provides a permanent fastening method
B. The joint made by overlapping of one plate over the other, and then riveting the two plates together with two rows of rivets is called ‘double riveted butt joint’
C. Shank diameter of the rivets should be less than the size of the hole drilled in the plate for riveting
D. The efficiency of a riveted joint is the ratio of the strength of the riveted joint to the strength of the solid plate - Pick out the wrong statement ?
A. For all the cylindrical process vessels operating above atmospheric pressure, formed heads are used for closing the vessel
B. Fouling factor of river water is less than that of sea water
C. Risers provided in bubble cap trays in the distillation column facilitate the flow of both liquid and vapor
D. Both B. and C. - Pick out the wrong statement?
A. Safety valves are provided in heat exchangers for removal of non-condensable
B. Liquid metals and Dowtherm are used for very high temperature heating
C. In a shell and tube heat exchanger, high pressure fluid is generally routed through the tube
D. A loop seal or U-seal is provided in a vertical condenser sub-cooler to prevent quick draining
of the condensate - Pick out the wrong statement about routing of fluids in a shell and tube heat exchanger ?
A. The corrosive and fouling fluid should be preferably routed through the tubes
B. The viscous fluid should be routed through the shell side
C. Lower flow rate fluid should be routed through the shell side
D. Higher pressure fluid stream should be routed through the shell side - Pick out the wrong statement pertaining to the design of the distillation column?
A. Generally, a skirt clearance of 0.5″ to 1.5′ is recommended to prevent plugging of the slots by
residue build up
B. The purpose of the slot is to disperse the gas into the liquid in the form of small bubbles
C. If sufficient slot area is not provided, the gas may pass through the skirt clearance
D. None of these - Pick out the wrong statement pertaining to ‘Horton sphere’ used for the storage of liquid ammonia ?
A. Diameter of Horton sphere is normally 6 to 25 metres and it is supported by 6 to 12 nos. tubular or rolled section column
B. Thickness of spherical shell is half that of the cylindrical vessel under same operating pressure condition. Besides, the ratio of surface area to volume is less for sphere than any other shape; hence insulation required is less
C. Horton sphere is used for the storage of gases and volatile liquid at a moderate pressure of 1 to 10 kg/cm2
D. Horton sphere is used for the storage of liquid at sub-zero temperature at very high pressure upto 200 kg/cm2
