15901. The ratio of thermal & electrical conductivity is same for all the metals at the same temperature ; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K)
15902. In a fuel cell, chemical energy is converted into
15903. Which of the following is not a cupro-nick-el alloy ?
15904. Electrochemical corrosion occurs
15905. The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.
15906. Improvement in mechanical properties of metals in its hot working is due to the grains
15907. Young's modulus of elasticity of a material is the slope of the initial linear portion of the stress-strain curve. It decreases ap-preciablyby
15908. Venturimeter is used to measure the flow rate of fluids in pipes, when the pipe is in __________ position.
15909. Often earing defects are found during deep drawing operation, because the
15910. __________ is not a case hardening process.
15911. Which one can be directly solidified from gaseous state wihtout entering into liquid state ?
15912. Section 56 of the KCS Act deals with
15913. Shock resisting steels should possess high
15914. Fatigue life is expected to increase by
15915. Specific __________ is a dimensionless quantity.
15916. __________ is not used as the control rod material in a nuclear reactor.
15917. Superheated vapour behaves like
15918. Toughness of a material is measured by the
15919. Pick out the wrong statement about nucleate boiling.
15920. L.D. (Linz-Donawitz) converter is used in the production of
15921. Turning/machining of __________ usually does not require any cutting fluid.
15922. Powder metallurgy processing can be used for making
15923. The moment of inertia of a body comes into play in __________ motion.
15924. Thermoplastics are never moulded using
15925. Pick out the wrong statement. If the net positive suction head (NPSH) requirement of a pump is not satisfied, then
15926. While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous or crystalline. The crystalline polymers are characterised by the
15927. The stress at which a metal fails by fatigue lies
15928. Annealing of a material does not
15929. A Society may invest funds in
15930. Boiler draught of 10 mm water column is equivalent to
15931. The fugacity of liquid water at 298 K is approximately 3171 Pa. Considering the ideal heat of vaporisation as 43723 J/gm mole, its fugacity at 300 K would be
15932. The leg of a barometric leg pump is longer than the Toricellian leg, which is about __________ metres.
15933. Commonly employed coolant for high pressure turbogenerator is
15934. Slight displacement of a floating body in liquid makes it to oscillate about its
15935. Buoyancy force depends on the __________ the liquid.
15936. "Encyclopaedia of Chemical Technology" has been
15937. Statistical quality control was developed by __________ , an American scientist during world war II.
15938. Production of a hollow product by inflation of a tube or parison is called the __________ process.
15939. A spark ignition petrol engine has
15940. Out of the following, the highest emf for a given temperature is generated by the __________ thermocouple.
15941. Which is the only metal that exists in liquid state at room temperature?
15942. An approximately __________ process exemplifies the flow of a gas through a very long pipe of uniform cross-section.
15943. A metal having a Poisson's ratio = 0.3 is elastically deformed under uniaxial tension. If the longitudinal strain = 0.8, then the magnitude of thickness strain is
15944. The quantity of electricity required to deposit one gm equivalent of any substance is one
15945. Surface tension is due to the __________ forces.
15946. At absolute zero temperature, for any reaction involving condensed phases
15947. Metals in general have a low value of thermal
15948. __________ of test specimens is not involved in any hardness testing method.
15949. Out of the following, the most ductile material is
15950. What happens, when SO2 is passed through a solution of H2S in water ?