28901. As per the Indian boiler regulation (IBR), the type of joint preferred for the circumferential joint is the __________ joint.
28902. Presence of small quantity of sulphur in low carbon steel improves its
28903. Duralumin is an alloy of aluminium and copper. Percentage of copper in duralumin is
28904. Copper is not present as an alloying constituent in
28905. Lead is added to 60:40 brass primarily to improve
28906. Air intake for an air compressor should be preferably taken from
28907. Current asset of a factory includes the
28908. Out of the following substances, one ton of __________ will store the maximum heat for a rise of 30°C in temperature.
28909. In which of the following reactions, application of vacuum will help ?
28910. Inspection of surface and sub-surface cracks in non-magnetic alloys is done by __________ testing method.
28911. Among the following which one is not related to a wave
28912. Which of the following exemplifies resemblence with the extrusion process ?
28913. Ester is formed, when an alcohol reacts with
28914. Which of the following accounts for maximum loss of energy in a coal fired boiler ?
28915. Presence of sulphur in the fuel fired in a furnace
28916. Boiling temperature of carbon dioxide at atmospheric pressure is __________ °C.
28917. Eutectoid reaction for iron-carbon system occurs at a temperature of __________ °C.
28918. The ability of a substance to assume two or more crystalline structure is called
28919. The main function of the deaerator used in the thermal power plant is to
28920. Lubricants can be used to
28921. Which of the following is termed as the boiler mounting ?
28922. Paint spray gun works on the principle of
28923. Gas carrying pipelines are best joined by
28924. Scab is a defect developed during __________ of metals.
28925. Pick out the wrong statement about powder metallurgy technique.
28926. A floating body oscillates about its __________ when it is displaced slightly.
28927. Which of the following relatively employs the highest heat transfer surface area in a high pressure boiler ?
28928. The routing function in a production system design is concerned with the
28929. Filler material used in welding having the lowest melting point out of the following is
28930. Which of the following has the highest density and the lowest melting point ?
28931. Electrolytes conduct electric current by
28932. To improve the machinability of steel by its softening, it is subjected to
28933. Heat transfer by radiation from a hot body will be most rapid, if its surface is __________ because of its higher emissivity.
28934. Reduction reaction involves the
28935. Specific heat of an ideal gas depends upon its
28936. In case of compression of one kg of air, the work done will be the least, when the value of polytropic index 'n' is
28937. A __________ type pressure sensing element is commonly used in aneroid barometer.
28938. A thermally thin body is the one for which
28939. Air refrigeration cycle is used in the air crafts, because of
28940. Failure of a material is attributed to __________ if it fails below its yield point.
28941. Protection of ship hulls against sea water corrosion is done by coating with zinc because of the fact that zinc compared to iron is
28942. Which of the following pairs regarding the effect of alloying elements in steels are not matched correctly ?
28943. The phenomenon of strain-ageing is generally experienced with
28944. The capacity of a material to absorb energy depends upon both its strength & stiffness. The term 'stiffness' of a material is the opposite of its
28945. Filler metal is not used in the __________ welding.
28946. The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : Cp of copper is 23 J K-1mole-1)
28947. Sudden immersion/dipping of red hot steel bar in water makes it
28948. A material expanding freely due to heating will develop __________ stress.
28949. A machine having assumed life of 20 years is purchased for Rs 32000/-. Its scrap value at the end of its life is Rs 8000/-. If the depreciation is calculated by diminishing balance method, then percentage reduction in its value at the end of first year is __________ percent.
28950. More than 1000 tons refrigeration capacity plants are usually of __________ type.
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