71001. The temperature in the upper part of the blast furnace (zone of reduction) is __________ that of the middle part.
71002. The temperature point at which the change starts on heating the steel is called
71003. Aluminium bronze has high resistance to corrosion.
71004. Manganese bronze contains more copper than silicon bronze.
71005. In a face centred cubic space lattice, there are
71006. The fuel used in a blast furnace is
71007. Face centred cubic space lattice is found in gamma-iron, aluminium, copper, lead, silver and nickel.
71008. Which of the following is a point imperfection?
71009. The process in which carbon and nitrogen both are absorbed by the metal surface to get it hardened is known as
71010. The catalysts are used to accelerate the chemical reaction during the process of ploymerisation of plastics.
71011. Muntz metal (Yellow brass) contains
71012. Which of the following gives the correct order of increasing hot hardness of cutting tool materials?
71013. The slag from the blast furnace
71014. Which of the following is a mesomorphous material?
71015. The casting ability of aluminium increases when __________ is added to aluminium.
71016. Manganese bronze has
71017. A steel is heated at about 875° C where the structure consists of entirely austenite. It is then cooled suddenly at a temperature of about 250° C to 525° C. This process of heat treatment is known as
71018. Silicon bronze contains
71019. In acidic bessemer process, the furnace is lined with
71020. The malleability is the property of a material by virtue of which a material
71021. The area of the largest circle that can be drawn inside a rectangle with 8 cm by 7 cm is (take Pie=22/7)
71022. Duplex process of steel making is a combination of
71023. In corrosion resistant properties, bronzes are __________ to brasses.
71024. Steel containing 0.8 to 1.5% carbon, is known as
71025. Brittle materials when subjected to tensile loads, snap off without giving any sensible elongation.
71026. The property of a material necessary for forgings, in stamping images on coins and in ornamental work, is
71027. The portion of the blast furnace above its widest cross-section is called
71028. The phosphorus and sulphur in steel making can be removed by using basic bessemer process.
71029. The heat treatment process used for castings is
71030. Micro-structure of a material is, generally, examined by
71031. The addition of magnesium to cast iron increases its
71032. A work can be completed by 24 men in 17 days.To complete the work in 12 days,the number of additional men required is:
71033. The slow cooling of steel from the __________ results in a coarse grained structure.
71034. Which one of the following sets of constituents is expected in equilibrium cooling of a hyper-eutectoid steel from austenitic state?
71035. A steel with 0.8% carbon and 100% pearlite is called
71036. 18/8 stainless steel consists of
71037. Vanadium when added to steel
71038. The limestone in the charge of a blast furnace decomposes to give lime and carbon dioxide. The lime thus obtained
71039. During the operation of a bessemer converter, the white flame indicates that the silicon and managenese had burnt and carbon has started oxidising.
71040. Specify the sequence correctly
71041. Thermoplastic materials are those materials which
71042. Which of the following material has maximum ductility?
71043. An eutectoid steel consists of
71044. Shock resisting steels should have
71045. A deposits an amount Rs.30,000 to obtain a simple interest at the rate of 12% per year for three years.What total amount will A get at the end of 3 years?
71046. 3/64 is what part of 1/16?
71047. If the fractions 5/14,6/11,7/9,8/13 and 9/10 are arranged in ascending order of their values,which one will be the fourth?
71048. The ratio between ages of A and B is 2:3 and that between B and C is 1:2 if the sum of the ages of three is 110 years,how old is C?
71049. On selling an article for Rs.300 there is a gain of 11 1/9%.What is its cost price?
71050. The velocity ratio in case of an inclined plane inclined at angle θ to the horizontal and weight being pulled up the inclined plane by vertical effort is