28751. Otto cycle used in spark ignition petrol engines is also known as the constant __________ cycle.
28752. Fire on fuel oil lines can be extinguished by
28753. In a furnace with heating element temperature at 1700°C, the dominant machanism of heat transfer will be
28754. Optical activity is a/an __________ property.
28755. Solution loss reaction occurs
28756. Out of the following materials, the one which generally exhibits an yield point is
28757. The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 - T2)/T1. The co-efficient of performance (CO.P.) of a Carnot heat pump operating between T1 and T2 is given by
28758. Diamagnetic materials
28759. In connection with corrosion of metals, passivation is the process that
28760. With increase in impurities in metals, their corrosion resistances
28761. Most important property of steels for use in automobile bodies is the
28762. Consideration of the creep is the most important in case of the
28763. Non-ferrous alloys used for making cutting tools need not have high
28764. Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts same. Shafts made by __________ have residual stresses.
28765. Capacity & power requirement for an air compressor working at high altitude compared to sea-level will be
28766. Glycerene is used as a coolant in cooling of some engines instead of water, because
28767. Cold working of a material results in increase in hardness, which is termed as the __________ hardening.
28768. Potable water means the water used for
28769. One ton of refrigeration is not equivalent to the heat removal rate of
28770. Starting friction is low in case of the __________ lubrication.
28771. Ultimate strength in tension as compared to that in shear for steel is
28772. Which of the following heat treatment processes is usually applied to castings ?
28773. Photographic plates are coated with
28774. Hardening of steel is not possible, unless it is heated __________ critical point.
28775. Isotropic materials have the same __________ in all directions.
28776. The most important requirement for aluminium industry is the availability of cheap
28777. Spheriodising of a material is a/an __________ process.
28778. The trace metal present in insulin is
28779. Cold cracking in the heat affected zone of a high strength steel weld can take place because of the
28780. Drossing is a __________ operation.
28781. Most of the phosphorous present in the blast furnace burden enters into
28782. During sensible heating of humid air
28783. Iron content in Indian iron ore is about __________ percent.
28784. The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is
28785. __________ of hard alloy and tool steel is done to make it easily machinable.
28786. Which of the following mainly decides the current to be employed is arc welding ?
28787. Temperature attained in soldering of metals is about __________ °C.
28788. The normal stress is the same in all directions at a point in a fluid, only when the fluid
28789. A 2 kg object weighs 1.8 kgf on a spring balance. The value of 'g' at that location in m/sec2 is
28790. In chemical dehumidification of air
28791. What is the pH of distilled water ?
28792. The molecular formula of H2SO4 is
28793. Dielectric
28794. Normalising of an object does not
28795. Plasma is
28796. The machanism involved in the removal of metal in drilling operation is by
28797. Thermal conductivity of a material does not depend upon its
28798. Carbon supply in pack carburising process is in the form of
28799. Water hammer is caused in steam carrying pipelines, because of
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