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You Are On Multi Choice Question Bank SET 435

21751. Reboiler is considered as one theoretical plate, because





21752. Mass transfer rate between two fluid phases does not necessarily depend on the __________ of the two phases.





21753. In a solution containing 0.30 Kg mole of solute and 600 kg of solvent, the molality is





21754. Fenske equation determines the





21755. The term "cooling range" in a cooling tower refers to the difference in the temperature of





21756. Which of the following is the most suitable for extraction in a system having very low density difference ?





21757. Ceramic recuperators are generally made of





21758. Hammers and railway rails are normally made of





21759. Softness of silver can be converted into hardness by alloying it with small quantity of





21760. The addition of antimony in tin-based alloys improves its





21761. The melleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the miximum malleability ?





21762. The main purpose of galvanising iron sheets is to





21763. The impure iron (pig iron) that is tapped out from blast furnace contains about __________ percent carbon.





21764. Invar used in thermocouples is an alloy of nickel and





21765. Nickel (56%) and molybdenum (17%) alloys are called





21766. Lead pipes are not safe for carrying drinking water because water containing dissolved oxygen attacks lead thereby forming poisonous Pb (OH)2. Lead pipes are readily corroded by





21767. The distance difference between the vehicle wheel bases from one side to the other is known as





21768. Residual magnetism in steel for magnets is increased by the addition of





21769. Presence of nickel in steel improves its





21770. Cementite is





21771. Acetylene gas holder is made of





21772. Sulphur melting pit in the sulphuric acid plant is made of





21773. The hardest material just prior to diamond in Mho's scale is





21774. Percentage elongation of a material is a measure of its





21775. Chlorination of benzene is done to produce benzene hexachloride (a pesticide) in a photochemical reactor lined with





21776. Heavy duty bearings are usually made of





21777. Dielectric strength of a material is





21778. Which of the following stainless steels is non-magnetic ?





21779. 18-4-1 high speed steel contains 18%, 4% and 1% respectively of





21780. Aluminium as a material of construction suffers from the disadvantage of





21781. Babbit metal used for bearings is a____base alloy.





21782. 18/8 steel is a/an __________ stainless steel.





21783. Cast iron has very high





21784. Liquid ammonia is shipped in __________ containers.





21785. Cermets are __________ materials.





21786. Cast irons are generally specified by their





21787. Austenitic manganese steel used for making jaws of crushing machines contains about __________ percent manganese.





21788. White cast iron is not





21789. Galvanised iron is





21790. German silver used for decorative purposes contains maximum percentage of





21791. The metals occuring at the lower most position in the electromotive series





21792. German silver in an alloy of





21793. A suitable material of construction to use with fuming sulphuric acid is





21794. Which of the following crystal structures characterises the austenitic stainless steel?





21795. Caustic soda is produced in a mercury cell having anode and cathode made respectively of moving mercury and





21796. In throttle body injection system install the injector using new “O”rings lubricated or coated with





21797. Which of the following has the highest compressive strength ?





21798. Zinc is not used





21799. Refined acetic acid storage vessel are made of





21800. Addition of __________ to the steel helps in increasing the residual magnetism in steel used for making magnets.





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