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You Are On Multi Choice Question Bank SET 299

14951. Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans ?





14952. Machinability of hard alloys and tool steels is improved by





14953. Transformation range for ferrous material is the temperature interval during which __________ is formed during its heating.





14954. Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an __________ body.





14955. In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that





14956. Cobalt - 60 is used as a source of __________ in medical therapy & industrial radiography.





14957. Absolute zero pressure can be attained at a temperature of





14958. The product out from a cupola is called





14959. Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as





14960. If the demand for an item is trebled and the order cost is reduced to one third, then the economic order quantity





14961. Copper deposits are found in India at the following location:





14962. Electrical conductivities of semi-conductors are of the order of __________ ohm/cm.





14963. Corrosion of metals can not be prevented by its





14964. Transition from laminar to turbulent zone in free convection heat transfer is governed by the critical value of





14965. The most economical channel section for the fluid flow is the one for which the discharge is maximum for a given cross-sectional area. Vertical velocity distribution in an open channel for laminar flow can be assumed to be





14966. Energy of the sun arises mainly from __________ reactions.





14967. Which of the following fastening devices has a head at one end and a nut fitted to the other ?





14968. Sudden fall of atmospheric pressure by a large amount is an indication of the





14969. In chemical dehumidification process





14970. Secondary hardening in steels arises out of the





14971. Drills are usually made of





14972. Tumbling is the process of improving the __________ of the materials/parts.





14973. The __________ of a double acting reciprocating pump as compared to the single acting pump will be almost double.





14974. __________ of air does not increase with increase in temperature.





14975. Spherical shape of mercury droplets is due to its





14976. Sub zero treatment of steel is done to





14977. Air-petrol ratio for maximum power generation in spark ignition engine is about





14978. Which of the following varies as the square root of oil pressure during atomisation of fuel oil through a pressure jet burner ?





14979. The most suitable material of construction for a sewer to carry sewage under high pressure is





14980. Filler material used in welding should have __________ as compared to the parent metal to be welded.





14981. Oxygen cylinders used for autogenous (cutting/welding) purposes are





14982. Identify the correct statement.





14983. Dowtherm is a





14984. To counteract the bad effects of strain hardening on a cold formed part, it must be





14985. The dew point temperature lines on psychrometric charts are straight inclined sloping downwards to the right. When relative humidity of moist air is 100%, then





14986. Galvanic corrosion can not be prevented by





14987. Fire in fuel gas pipelines is extinguished most effectively by





14988. Which of the following is the most suitable abrasive for grinding high tensile strength materials ?





14989. Case hardening is not done by





14990. Satellites burn off during re-entry to earth's atmosphere, because of the





14991. With increase in compression ratio, the volumetric efficiency of air compressor





14992. Neutrons are present in all atoms except that of





14993. Biological shield in a nuclear reactor is generally provided to protect against the





14994. __________ circuit is most commonly used to measure strain with the help of a strain gauge.





14995. Which of the following is normally not found in both the S.I. (petrol) & C.I. (diesel) engines ?





14996. __________ is a special constituent of chlorophyll without which photosynthesis is not possible.





14997. __________ is used as a material of construction for the blade of power saw.





14998. During decarburising of a plain carbon steel, the thickness of ferrite layer growth is proportional to





14999. Laser welding is widely employed in the __________ industries.





15000. Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a __________ calorimeter.



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