1) The most suitable material of construction for a sewer to carry sewage under high pressure is________________________? a. Asbestos cement b. Steel c. Cement concrete d. Stoneware
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2) Which of the following is not a dielectric material ? a. Cotton, silk and paper b. Asbestos, glass, porcelain and mica c. Rubber and polymeric resins d. All refractory materials
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3) Particle nature of cathode rays is proved due to the fact that they ________________? a. Travel in a straight line b. Get deflected by magnetic electric field c. Produce fluorescence d. Heat the exposed material
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4) Which of the following is prone to cup and cone fracture ? a. Cast iron b. Soft brass c. Round specimen of ductile metal d. Flat tensile specimen of ductile metal
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5) Minimum safe distance between two liquid fuel storage tanks is equal to (where, H = height of the tank) ? a. H b. H/2 c. H/4 d. H/6
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6) Austempering process results in the formation of ________________ structure ? a. Martensitic b. Bainitic c. Carburised d. Stressed
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7) Good design of the casing of a centrifugal pump aims at minimising the __________________________? a. Cavitation b. Frictional losses c. Kinetic energy loss d. Static head
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8) 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 ? a. 159 b. 1837 c. 2537 d. 10000
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9) Matte smelting is used in the extraction of_____________________? a. Lead b. Zinc c. Aluminium d. Copper
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10) Carnot cycle is also termed as the constant _________________ cycle in thermodynamics? a. Entropy b. Pressure c. Volume d. Heat
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11) Large diameter reinforced cement concrete (RCC) pipes are generally joined by ____________________ joint ? a. Flanged iron b. Collar c. Flexible d. Expansion
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12) A dummy activity is used in PERT network to describe the_____________________? a. Precedence relationship b. Resource idleness c. Resource restriction d. Necessary time delay
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13) Unit of viscosity in CGS system is_______________________? a. gm .cm-1 sec-1 b. gm . cm2 . sec-2 c. gm .cm-2, sec-1 d. gm . cm . sec-1
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14) The refractory lining of the bottom in a basic electric arc furnace is made of___________________? a. Silica b. Alumina c. Magnesia d. Fireclay
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15) The specific gravity of coal depends mainly on its __________________ content ? a. Carbon b. Volatile matter c. Ash d. Moisture
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16) In practice, the compression ratio of compression-ignition (CI) engine ranges from ______________________? a. 15 to 25 b. 5 to 10 c. 40 to 55 d. 60 to 70
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17) Brittleness induced due to the presence of sulphur in steel can be reduced by adding____________________? a. Manganese b. Magnesium c. Vanadium d. Copper
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18) With increase in temperature, the surface tension of water_______________________? a. Increases b. Decreases c. Remain constant d. Increases linearly
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19) Compressed dry air is used as the cutting fluid, while machining____________________? a. Steel b. Cast iron c. Aluminium d. None of these
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20) With increase in compression ratio, the volumetric efficiency of air compressor____________________? a. Increases b. Decreases c. Remain same d. May increase or decrease (depends on the suction pressure)
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21) Which of the following has the least value of ultimate tensile strength (UTS) ? a. Medium carbon steel b. High carbon steel c. Cast iron d. Wrought iron
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22) Current employed in resistance welding ranges from ____________________ kVA/cm2? a. 1.2 to 2.5 b. 4.5 to 6.2 c. 7.5 to 8.5 d. 10.5 to 15.5
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23) Presence of nickel & chromium in steel does not raise its _________________? a. Elastic limit b. Machining properties c. Ductility d. Resilience
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24) Materials having ________________ lattice structure are usually the most ductile ? a. Body centred cubic (bcc) b. Hexagonal close packed (hcp) c. Face centred cubic (fcc) d. None of these
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25) Stresses encountered in the metal forming processes are less than the _____________ of the material? a. Fracture strength b. Yield strength c. Elastic limit d. Limit of proportionality
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26) Damage to metal surface by mechanical action is called____________________? a. Pitting b. Corrosion c. Erosion d. None of these
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27) Minimum number of members required to form a Public Limited Joint Stock Com-pany is___________________? a. 7 b. 10 c. 12 d. 17
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28) Increase in the entropy of a system represents the_____________________? a. Degradation of energy b. Decrease in system pressure c. Increase in the availability of energy d. Increase in the temperature
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29) Spherical shape of mercury droplets is due to its____________________? a. High viscosity b. Low surface tension c. High density d. High surface tension
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30) Carbon is present in the form of _______________________ in grey cast iron ? a. Spheroids b. Nodular aggregates of graphite c. Flakes d. Cementite
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31) The heat of neutralisation remains constant, when there is a reaction between dilute solutions of strong _____________________? a. Base and strong acid b. Base and weak acid c. Acid and weak base d. None of these
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32) ‘Cryogenics’ is concerned with the generation & use of low temperature in the range of____________________? a. 0°K to 123°K b. 0°C to – 123°C c. 0°C to – 273°C d. 0°K to 273°K
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33) __________________ of air does not increase with increase in temperature? a. Density b. Thermal diffusivity c. Viscosity d. Thermal conductivity
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34) The value of y = cp/cv. at < 500°C for air & most common gases can be safely assumed to be_____________________? a. 0.8 b. 1 c. 1.4 d. 1.8
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35) Which of the following varies as the square root of oil pressure during atomisation of fuel oil through a pressure jet burner ? a. Output & fineness b. Velocity c. Both A. & B. d. None of these
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36) ______________ joint is usually used for joining cast iron pipes mostly used for temporary pipelines, where it may be necessary to dismantle & reassemble the pipeline very frequently ? a. Collar b. Flanged c. Bell and Spigot d. Expansion
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37) The pressure outside a bubble/droplet of liquid is ________________ the internal pressure? a. Greater than b. Less than c. Equal to d. Unpredictable; depends on the bubble size
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38) Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of Portland cement. The component of Portland cement which first hardens is_____________________? a. 5CaO. 3 Al2O3 b. 3CaO. Al2O3 c. 3CaO. SiO2 d. 2CaO. SiO2
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39) Oxygen cylinders used for autogenous (cutting/welding) purposes are ___________________? a. Seamless & made of steel b. Heat treated before use c. Made by sand casting d. Welded steel cylinders
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40) Heating of ferromagnetic materials to a temperature above Curie temperature makes it ________________________? a. Insulator for heat & electricity transmission b. Ferritic c. Behave like paramagnetic materials d. Superconductor
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