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1) The lightest non-inflammable gas is_________________? a. H2 b. He c. Ar d. O2
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2) The surface tension of a liquid, at critical temperature is____________________? a. Indeterminate b. Zero c. Infinity d. Same as that at any other temperature
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3) ‘Amortization’ in respect of financial obligation of a company means the_____________________? a. Liquidation of financial obligations on instalment basis b. Commitment of financial obligation on priority c. Liquidation of all the obsolete equipments of the company d. Modernisation of the plant equipments
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4) The same volume of all gases is representative of their_____________________? a. Specific gravities b. Densities c. Gas characteristic constants d. Molecular weights
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5) The function of neutral flux used in the pyrometallurgy of metal extraction is to increase the _____________ of the slag ? a. Fluidity b. Basicity c. Acidity d. Viscosity
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6) For infinite parallel planes having emissivities ε1 & ε2, the interchange factor for radiation from surface 1 to surface 2 is given by__________________? a. (ε1 + ε2)/ε1.ε2 b. ε1.ε2/(ε1 + ε2 – ε1.ε2) c. ε1.ε2 d. ε1 + ε2
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7) Wave length of X-rays is about 1 angstrom; however it cannot pass through a sheet of ________________? a. Paper b. Cloth c. Lead d. Aluminium
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8) Which of the following is an unconventional source of energy ? a. Thermal power b. Hydroelectric power c. Nuclear-fusion power d. Solar power
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9) Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well. The thermal well made of ______________ will facilitate the most accurate measurement of the temperature ? a. Copper b. Steel c. Aluminium d. Brass
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10) Silicon in steel__________________? a. Makes it usable in almost all magnetic circuits where alternating current is used b. Increases its electrical resistivity and decreases the hysteresis loss c. Is present upto 5% & 4% respectively when used in transformers & motor armatures d. All ‘A’, ‘B’ & ‘C’
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11) Super heating of steam is done at constant___________________? a. Enthalpy b. Entropy c. Pressure d. Volume
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12) Corrosion is____________________? a. A physical phenomenon b. A chemical phenomenon c. Same as erosion d. An uncontrollable phenomenon
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13) Which of the following phenomenon will exhibit the minimum heat transfer ? a. Boiling b. Forced convection in air c. Free convection in air d. Conduction in air
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14) Which of the following metals cannot be hot worked at room temperature ? a. Zinc b. Nickel c. Lead d. Tin
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15) Which of the following equipments is used for liquid dispersion ? a. Packed column b. Venturi scrubber c. Bubble cap plate column d. Wetted wall column
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16) Limestone is added in the blast furnace (during pig iron manufacture) to______________________? a. Form slag by combining with impurities b. Supply heat by undergoing exothermic reaction with impurities c. Reduce the coke consumption d. Reduce slag viscosity
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17) The boiling & freezing points on a newly defined temperature scale in degree ‘D’ are 400°D & 100°D respectively. The temperature reading corresponding to 60°C on this new temperature scale will be equal to _____________ °D ? a. 140 b. 180 c. 240 d. 280
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18) Difference at any instant between the value of the controlled variable and the set point is called the__________________? a. Deviation b. Derivative time c. Error ratio d. Differential gap
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19) Cementite is in the lamellar form in the _____________________ phase of steel ? a. Martenistic b. Bainitic c. Pearlitic d. Ferritic
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20) Brazing is the joining of metals_____________________? a. Without melting the base metal b. With a non-ferrous filler c. Both A. & B. d. Neither A. nor (B)
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21) Midrex process of sponge iron production uses reformed natural gas as the reducing agent, which uses iron ore in the form of_________________? a. Lumps b. Pellets c. Briquettes d. Sinter
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22) Specific gravity of a metal, which weighs 5 kg in air and 4 kg when submerged in water, will be_____________________? a. 5 b. 1.25 c. 2.5 d. 3.75
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23) Which of the following low melting alloy containing bismuth and lead is used for electric fuse ? a. Wood’s metal b. Babbitt metal c. Monel metal d. Duralumin
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24) Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of_____________________? a. 90% tungsten carbide and 10% cobalt b. 70% aluminium oxide & 30% silica c. 30% nickel, 15% chromium & 55% tungsten d. 65% tungsten & 35% zirconium
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25) The mechanism which changes the value of manipulated variable in response to the output signal from the control unit is called the___________________? a. Final control element b. On-off control c. Floating control action d. None of these
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26) The substance used as a smoke screen in warfare is___________________? a. C2H2 b. SiCl4 c. P2O5 d. PCl5
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27) Increasing sulphur content in pig iron tends to make it ________________? a. Soft b. Hard c. Tough d. Ductile & malleable
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28) Fahrenheit and Centigrade scales have the same readings at _____________________? a. -55° b. -40° c. -33° d. -58°
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29) For separating small pieces of metal from engine oil of a car, the best separating technique is the _____________________ ? a. Chromatography b. Evaporation c. Filtration d. Fractional distillation
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30) In the formation of cermets, the ratio of ceramic material to metallic material is usually 80:20. Which of the following is a cermet ? a. Zirconia b. Alumina c. Bakelite d. Tungsten carbide
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31) In TIG welding, thoriated tungsten electrodes are used, because it ____________________? a. Has higher current carrying capacity b. Has better electron emissivity c. Is stronger than ordinary tungsten d. Is easy to prepare
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32) The expected efficiency of a single riveted lap joint is of the order of 50%. If the thickness of the plate is increased four times, then the rivet diameter will have to be increased ___________________ times ? a. Two b. Four c. Six d. Eight
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33) A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material ? a. Steel b. Glass c. Rubber d. Brass
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34) The dimensional formula of bulk modulus of elasticity is same as that of the ____________________? a. Pressure b. Density c. Force d. None of these
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35) Working of linear variable differential transducer (LVDT) is based on the principle of variable_____________________? a. Capacitance b. Resistance c. Mutual inductance d. None of these
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36) A cylindrical rod subjected to a tensile strain within the elastic limit undergoes a volume change. If the volume strain is equal to half the tensile strain, then the Poisson’s ratio of the rod is___________________? a. 0 b. 0.33 c. 0.44 d. 0.25
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37) Which of the following metals is the most prone to work hardening ? a. Brass b. Aluminium c. Copper d. Lead
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38) Wavelength of radiation emitted by a body depends on the ________________ of its surface? a. Temperature b. Area c. Nature d. All ‘A’, ‘B’ & ‘C’
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39) A pycnometer is used for the measurement of________________________? a. Flow rate of molten metal b. Specific gravity of a liquid c. Composition of alloys d. Concentration of a solution
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40) Circular cross section machine parts which are symmetrical about the axis of rotation are made by hot_____________________? a. Piercing b. Spinning c. Drawing d. Extrusion
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