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1) Calorific value of ____________________ are almost same? a. Lignite & anthracite coal b. Lignite & coal gas c. Petrol & diesel d. Coal gas & natural gas
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2) _______________ is not a case hardening process ? a. Carburising b. Nitriding c. Cyaniding d. Annealing
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3) The atmospheric temperature during melting of ice/snow (in the atmosphere)_________________? a. Decreases b. Increases c. Remain same d. May increase or decrease; depends on the altitude where snow melts
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4) Silicon percentage in acid resistant cast iron is about ___________________? a. 4 b. 8 c. 14 d. 20
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5) Thermal equivalent of electrical power in practical calculation is _______________ kcal/kWh ? a. 746 b. 3000 c. 1000 d. 550
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6) One of the methods of purification of leach liquor is ion exchange, which involves_________________? a. Exchange between two liquid phases b. Exchange between a gaseous phase and a liquid phase c. Exchange between a liquid phase and an organic resin phase d. Exchange between a solid phase and a gas phase
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7) The unit of gc is ___________________? a. lbm/lbf. ft/sec2 b. lbf/lbm. ft/sec2 c. ft/sec2 d. lbm/lbf. sec2/ft
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8) Notched bar test is used for testing the _________________ of a material? a. Impact strength b. Endurance limit c. Machinability d. Corrosion resistance
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9) A material being tested for endurance strength is subjected to the _______________ load ? a. Impact b. Completely reversed c. Dynamic d. Static & dynamic
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10) The most abundant metal present in the earth’s crust is__________________? a. Iron b. Copper c. Titanium d. Aluminium
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11) The fugacity of liquid water at 298 K is approximately 3171 Pa. Considering the ideal heat of vaporisation as 43723 J/gm.mole, its fugacity at 300 K would be________________? a. 3171Pa b. 3567Pa c. 1.01 × 105Pa d. 5000Pa
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12) Cold heading or upsetting is categorised as the ________________ process ? a. Extrusion b. Bending c. Rolling d. Forging
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13) Which one can be directly solidified from gaseous state without entering into liquid state ? a. Helium b. Oxygen c. Carbon dioxide d. None of these
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14) Out of the following, maximum temperature drop for a given heat flow & for the same thickness will be in the case of________________? a. Steel b. Glass wood c. Copper d. Fireclay bricks
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15) Glass reacts with___________________? a. H2SO3 b. HF c. HNO3 d. K2Cr2O7
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16) Lead is added to 60:40 brass primarily to improve_________________? a. Machinability b. Corrosion resistance c. Fluidity d. Strength
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17) A steam pipe is intended to be insulated with two layers of insulating materials of different thermal conductivities. For minimum heat transfer to take place_________________? a. The better insulation material should be put just next to pipe (i.e., inside) b. The better insulating material should be put outside c. Either of the insulating material could be put on either side d. Steam temperature is considered before deciding as to which insulating material is to be put inside (i.e., just next to the pipe)
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18) A material subjected ________________ must have high resilience? a. Shock loading b. Vibration c. Fatigue d. Tension
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19) An example of unsteady non uniform flow is the flow of liquid under pressure through a__________________? a. Tapering pipe at constant flow rate b. Tapering pipe at either decreasing or increasing flow rate c. Long pipeline of constant diameter d. None of these
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20) Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________________ method? a. Diminishing balance b. Sinking fund c. Multiple straight line d. Sum of the years digit
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21) Gas turbine normally employs a constant _______________ cycle? a. Pressure b. Temperature c. Volume d. None of these
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22) Surface tension of a liquid_________________? a. Is due to intermolecular forces of cohesion b. Decreases with rise in temperature c. Is responsible for the spherical shape of an isolated liquid drop d. All A, B. & C
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23) Boiler draught of 10 mm water column is equivalent to_____________________? a. 1 kgf/m2 b. 10 kgf/m2 c. 10 kgf/mm2 d. 1 kgf/mm2
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24) What is the range of tempering temperature (°C) for most of the materials ? a. 75-100 b. 200-300 c. 350-450 d. 500-600
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25) Heat transfer by ______________ is almost absent in case of fluidised bed drying operation? a. Radiation b. Conduction c. Convection d. Both B. & C.
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26) The ‘laughing gas’ is__________________? a. Nitrous oxide b. Nitric oxide c. Nitrogen trioxide d. Nitrogen pentoxide
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27) Regeneration of molecular sieve requires it to be heated to a temperature of about __________________ °C? a. 80-120 b. 200-300 c. 600-800 d. 1000-1100
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28) ____________________ metal is used as a bearing liner material? a. Pewter b. White c. Babbitt d. Gun
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29) Melting point & boiling points of liquid oxygen are respectively – 218.8°C & – 183°C, while the same for liquid nitrogen is – 210°C & – 195.8°C respectively. The difference in melting points of liquid oxygen & liquid nitrogen is not equal to 8.8 ? a. °C b. °F c. °K d. °R
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30) The activity of pure hydrogen gas at 1000°C and 5 atm pressure_________________? a. Is always less than 1 b. Is always greater than 1 c. Can be 5 d. Depends on the choice of the standard state
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31) Brazing filler metal used for joining steel plates_________________? a. Melts below the melting points of base metals b. Melts below 300°C c. Is copper phosphorous alloy d. Is copper
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32) If the head is doubled in & centrifugal pump, the power required will increase in the ratio of__________________? a. 23 b. 23/2 c. 25/2 d. 21/3
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33) The minimum temperature to which the water can be cooled in a cooling tower is the ______________ temperature of air? a. Ambient b. Dry bulb c. Dew point d. Wet bulb
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34) Ammonia gas can be dried by___________________? a. PCl5 b. Quick lime c. CaCl2 d. Concentrated H2SO4
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35) ‘Dikes’ are low height walls made around the storage vessels meant for storing hazardous & inflammable material (e.g., petroleum products). Volume of dikes is equal to (where, V = volume of the storage vessel) ? a. V b. V/2 c. 2V d. 3V
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36) On decreasing the grain size of a polycrystalline material, the property most likely to deteriorate is__________________? a. Creep b. Toughness c. Tensile strength d. Fatigue
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37) Out of the following substances, one ton of ______________ will store the maximum heat for a rise of 30°C in temperature ? a. Steel b. Lignite c. Water d. Lime stone
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38) Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m2 .k), when the insulation thickness is ________________ mm? a. 15 b. 25 c. 10 d. 30
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39) Parallel straight line pattern of temperature distribution for both hot and cold fluids is observed in case of heat exchanger of the type________________? a. Parallel flow with equal heat capacities b. Counter flow with equal heat capacities c. Counter flow with unequal heat capacities d. Parallel flow with unequal heat capacities
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40) Though tin occurs lower than iron in the electrochemical series, yet it is coated on steel for corrosion protection, because of its________________? a. Lower cost b. Abundant availability c. Resistance to vegetable acids as the tin plate are commercially used in ‘canning’ industry d. None of these
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41) Steel produced from phosphatic iron is _______________ in nature? a. Malleable b. Ductile c. Brittle d. Tough
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42) Pick out the wrong statement ? a. The equivalent stiffness of two springs (of equal stiffness ‘S’) in series is S/2 while in parallel is 2S b. For a helical spring, deflection is proportional to D3 (D = mean coil diameter) or d4 (d = wire diameter) c. Crushing load or columns is less than the buckling load d. Modulus of resilience is proportional to (stress at elastic limit)2
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43) Pick out the wrong statement? a. Ductile fracture of a stressed material, which exhibits a large plastic deformation is commonly caused by the formation and coalescence of voids in th b. Brittle fracture is caused by the propagation of pre-existing cracks in the material and involves minimum plastic deformation c. Fatigue fracture of a material is always brittle in nature and takes place due to the existence of line imperfections d. Brittle materials are generally tested in tension
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44) Pick out the wrong statement ? a. Geothermal energy is a non-conventional source of energy b. Mass is converted into energy in both nuclear fission & fusion reaction c. Inhalation of mercury vapour is not harmful for human beings d. Inhalation of arsenic causes cancer
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45) Pick out the wrong statement ? a. The X-rays cannot be deflected by electric field unlike cathode rays b. The intensity of X-rays can be measured by ionisation current produced due to the ionisation of gas by X-rays c. The quality of X-rays can be controlled by varying the anode-cathode voltage d. Crystal structure of a material can be studied by an electron microscope
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46) Pick out the correct statement ? a. Jet engine can work, where there is no atmosphere b. Rocket engines cannot work, where there is no atmosphere c. Rocket engines carry oxygen required for the combustion in the form of oxidiser d. Jet engines also carry oxidiser
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47) Pick out the wrong statement? a. Processing of thermosetting plastics is ideally done by injection moulding b. Processing of thermoplastics is ideally done by compression moulding c. Mass production of seamless pipes are done by electrical resistance welding (ERW) d. Stretch forming is a process of cold drawing
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