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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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