28601. Puddling process is used for converting pig iron into
28602. Addition of __________ in steel can help in increasing the depth of hardness.
28603. On-off control
28604. The tensile load-elongation curve of a metal does not describe
28605. Usual value of the resistance suitable for a wire resistance strain gauge is __________ ohms.
28606. Permanent set in a material is produced by subjecting it to
28607. The following is a typical anionic collector used in flotation.
28608. A solution which resists change in its pH value on addition of acid/alkali is called the __________ solution.
28609. Acetic acid is the chemical name of
28610. The bolt is subjected to __________ when the nut is tightened by putting the washer beneath it.
28611. Which of the following is not categorised as the ore agglomeration process ?
28612. With increase in temperature, the surface tension of water
28613. A reduction in thermal resistance during heat transfer does not occur in the
28614. Unit of viscosity in CGS system is
28615. Shaft/rotor speed is most accurately measured by a
28616. __________ test determines the yield strength, Young's modulus of elasticity, percentage reduction in area & percentage elongation of a material.
28617. The rolling process can not be used to produce
28618. Co-efficient of performance of a Carnot cycle refrigerator operating between - 23°C and + 27°C is
28619. Presence of nickel & chromium in steel does not raise its
28620. Hot extrusion process is not used for making
28621. Addition of __________ to steel does not help in improving its machinability.
28622. Quartz is a __________ material.
28623. The units of the rate constant for a second order reaction are
28624. The most serious manufacturing defect from fracture toughness point of view is
28625. Leakage in a cooking gas cylinder is detected by
28626. Which of the following is the most wear resistant grade of carbide used for the cutting tools?
28627. The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?
28628. Laser is a device to produce
28629. Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron.
28630. Minimum thermal efficiency of a steam boiler may be around __________ percent
28631. The temperature at which the magnetic property of iron disappears (i.e., it becomes non-magnetic) and its electrical conductivity & specific heat also changes, is called the 'Curie point', which is __________ °C.
28632. Fatigue limit improvement by over stressing the metal by successively increasing the load is called coaxing. In fatigue failure, the material fails
28633. The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability ?
28634. Particle nature of cathode rays is proved due to the fact that they
28635. The most commonly used moderator in nuclear power plants is
28636. Babbit lining is used on brass/bronze bearings to increase the
28637. The heat of neutralisation remains constant, when there is a reaction between dilute solutions of strong
28638. Joining of thin foils is preferred to be done by
28639. Which of the following metals reacts violently with water ?
28640. A steam carraying pipeline is insulated with two layers of insulating materials with the inferior insulation material forming the inner part. If the two insulating layers are interchanged, the heat conducted will
28641. Damage to metal surface by mechanical action is called
28642. The escape velocity of a body on earth which is independent of its mass is about __________ km/second.
28643. Which of the following test is used for distinguishing among dry oils, semi-drying oils and non drying oils ?
28644. The wet bulb temperature is lower in dry air than in wet air at the same temperature. A dry bulb thermometer registers a higher temperature than a wet bulb thermometer except at __________ percent relative humidity.
28645. The process of removal of scale formed during hot rolling of steel is termed as
28646. A psychrometer does not measure the __________ temperature of moist air.
28647. An ideal material for making cooking vessels should have
28648. Which of the following approaches the ideal gas behaviour most closely ?
28649. Which of the following is not the function of a volute casing provided in a centrifugal pump ?
28650. The pressure outside a bubble/droplet of liquid is __________ the internal pressure.
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