28451. Copper deposits are found in India at the following location:
28452. Electrical conductivities of semi-conductors are of the order of __________ ohm/cm.
28453. Corrosion of metals can not be prevented by its
28454. Transition from laminar to turbulent zone in free convection heat transfer is governed by the critical value of
28455. 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
28456. Energy of the sun arises mainly from __________ reactions.
28457. Which of the following fastening devices has a head at one end and a nut fitted to the other ?
28458. Sudden fall of atmospheric pressure by a large amount is an indication of the
28459. In chemical dehumidification process
28460. Secondary hardening in steels arises out of the
28461. Drills are usually made of
28462. Tumbling is the process of improving the __________ of the materials/parts.
28463. The __________ of a double acting reciprocating pump as compared to the single acting pump will be almost double.
28464. __________ of air does not increase with increase in temperature.
28465. Spherical shape of mercury droplets is due to its
28466. Sub zero treatment of steel is done to
28467. Air-petrol ratio for maximum power generation in spark ignition engine is about
28468. Which of the following varies as the square root of oil pressure during atomisation of fuel oil through a pressure jet burner ?
28469. The most suitable material of construction for a sewer to carry sewage under high pressure is
28470. Filler material used in welding should have __________ as compared to the parent metal to be welded.
28471. Oxygen cylinders used for autogenous (cutting/welding) purposes are
28472. Identify the correct statement.
28473. Dowtherm is a
28474. To counteract the bad effects of strain hardening on a cold formed part, it must be
28475. 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
28476. Galvanic corrosion can not be prevented by
28477. Fire in fuel gas pipelines is extinguished most effectively by
28478. Which of the following is the most suitable abrasive for grinding high tensile strength materials ?
28479. Case hardening is not done by
28480. Satellites burn off during re-entry to earth's atmosphere, because of the
28481. With increase in compression ratio, the volumetric efficiency of air compressor
28482. Neutrons are present in all atoms except that of
28483. Biological shield in a nuclear reactor is generally provided to protect against the
28484. __________ circuit is most commonly used to measure strain with the help of a strain gauge.
28485. Which of the following is normally not found in both the S.I. (petrol) & C.I. (diesel) engines ?
28486. __________ is a special constituent of chlorophyll without which photosynthesis is not possible.
28487. __________ is used as a material of construction for the blade of power saw.
28488. During decarburising of a plain carbon steel, the thickness of ferrite layer growth is proportional to
28489. Laser welding is widely employed in the __________ industries.
28490. 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.
28491. Which of the following is used to produce draught in the locomotive boilers ?
28492. Temper brittleness of a material can be fairly detected by the __________ test.
28493. When the wavelength of incident X-rays increases, the angle of diffraction
28494. The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation is
28495. The specific gravity of coal depends mainly on its __________ content.
28496. In case of condensers & evaporators operating under given terminal conditions, LMTD (logarithmic mean temperature difference) for counter flow as compared to that for parallel flow is
28497. Normalising does not __________ of a metal.
28498. Which of the following hardness tests does not measure the indentation hardness of metals and alloys ?
28499. With increase in annealing temperature, the following defect density decreases.
28500. Carnot cycle is also termed as the constant __________ cycle in thermodynamics.
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