28852. Nusselt number is related to the Reynolds number (Re) in turbulent & laminar flow respectively as
28853. Lead pencil contains
28854. Function of gear box is to
28855. Pearlite comprises of
28856. Which of the following if present in iron ore, enhances its value ?
28857. As per international norms, the maximum permissible value of noise level in the industrial environment is __________ decibels as measured at a distance of 1.5 metres from the source of noise.
28858. LVDT used for displacement measurement is a/an __________ transducer.
28859. A static fluid can not have
28860. In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the
28861. Which of the following is the most elastic material ?
28862. The 'laughing gas' is
28863. Glass reacts with
28864. The cost of providing service in a queing system decreases with the
28865. The activity co-efficient of the solute in a dilute solution
28866. Constituents of stellite are
28867. The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for __________ at room temperature.
28868. Multistage compression is necessary for high efficiency,
28869. __________ can not increase the fatigue strength of a material.
28870. If the head is doubled in & centrifugal pump, the power required will increase in the ratio of
28871. Work hardenable alloy steel used to make the bucket wheel excavators, blades of bulldozers and other earth moving equipments contain iron, carbon and
28872. Electrometallurgy is not involved in the extraction of __________ from its ore.
28873. A freely floating object is stable, if its centre of buoyancy
28874. Which of the following materials does not form adherent oxide film on surface ?
28875. Cassiterite is an ore of
28876. In sheet metal forming, stretcher strains occur in
28877. For grinding of softer materials, the grinding wheel should have __________ grain size.
28878. Nusselt number/Biot number varies
28879. Out of the following, maximum temperature drop for a given heat flow & for the same thickness will be in the case of
28880. Parallel straight line pattern of temperature distribution for both hot and cold fluids is observed in case of heat exchanger of the type
28881. Rockwell number represents the
28882. Which of the following fastening devices has its both ends threaded ?
28883. Notched bar test is used for testing the __________ of a material.
28884. The most suitable material for die casting is
28885. Heating of an ore below its melting point in presence of excess of air is called
28886. Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________ method.
28887. A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalant bonds resulting in __________ electrons.
28888. The bank of tubes located at the back of the domestic refrigerators are the __________ tubes.
28889. Material having negative co-efficient of linear expansion is
28890. Specific gravity of hot metal (pig iron) is __________ times that of the blast furnace slag.
28891. __________ is the hardest material out of the following.
28892. The phenomenon of weld decay is found in case of
28893. If a solid is compressed adiabatically in its elastic range, its __________ remains constat
28894. 'GASOHOL' widely used in Brazil as a motor fuel is a mixture of alcohol and
28895. On decreasing the grain size of a polycrys-talline material, the property most likely to deteriorate is
28896. It is possible to form martensite
28897. Which of the following material handling equipments is not suitable for moving materials in varying paths ?
28898. The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam.
28899. Thermal equivalent of electrical power in practical calculation is __________ kcal/kWh.
28900. Gross & Net calorific values will be the same for
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