02 Chemical Engineering MCQ | Quiz | Practice Tests - Multiple choice questions and Objectives
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1 >>In the blast furnace, incorporation of water vapour in the blast gives the following effect. ?
  • (A) Increases the reducing potential of the gas.
  • (B) Increases the flame temperature.
  • (C) No significant change occurs.
  • (D) Increases the hydrogen content in the metal.
2 >>Pick out the wrong statement. ?
  • (A) A ferromagnetic material becomes paramagnetic above the 'Curie temperature'.
  • (B) Permanent magnets are made of hard materials, whereas electromagnets require soft magnetic materials.
  • (C) Soft magnetic materials (e.g., pure iron) have higher permeability and low hysterisis loss and coercive forces.
  • (D) Tungsten steel and alnico are not hard magnetic materials.

3 >>The usual energy consumption in electric arc furnace steel making is __________ KWh/ton of steel. ? 
  • (A) 60 - 100
  • (B) 400 - 700
  • (C) 1200 -1500
  • (D) 2000 - 2300

4 >>Maximum permissible air velocity in pipelines is about __________ metre/second. ?
  • (A) 5
  • (B) 10
  • (C) 20
  • (D) 40
5 >>Area under the stress-strain curve upto the __________ is referred to as the modulus of resilience. ?
  • (A) yield strength
  • (B) elastic limit
  • (C) proportional limit
  • (D) maximum point

6 >>__________ is the hardest oxide and is hence used where high wear resistance at high temperature is required. ?
  • (A) Beryllia
  • (B) Zirconia
  • (C) Alumina
  • (D) Magnesia
7 >>Titanium alloys are welded using the Following process: ?
  • (A) TIG welding.
  • (B) Submerged arc welding.
  • (C) Butt welding.
  • (D) Electron beam welding.
8 >>An alloy of Fe - 0.4 % C is ?
  • (A) cast iron.
  • (B) hypo-eutectoid steel.
  • (C) hyper-eutectoid steel.
  • (D) eutectoid steel
9 >>A material in which the atoms are arranged regularly in some directions but not in others, is termed as 'mesomorphous material'; an example of which is ?
  • (A) lead
  • (B) glass
  • (C) mica
  • (D) silver

10 >>In extrusion of metals, which of the following statement is true ? ?
  • (A) speed of the extruded material is same as that of ram speed.
  • (B) Redundant work is a function of the die angle.
  • (C) Relative motion between the billet surface and the container wall is always present.
  • (D) Hollow ram is used for indirect extrusion.
11 >>Nuclear fission of one atom of uranium-235 produces the energy equivalent to about __________ MeV. ?
  • (A) 20
  • (B) 200
  • (C) 500
  • (D) 1000

12 >>Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans ? ?
  • (A) Emissivity of pipe surface.
  • (B) Diameter & length of the pipe.
  • (C) Temperature of hot pipe surface & that of air in the room.
  • (D) none of these.
13 >>Machinability of hard alloys and tool steels is improved by ?
  • (A) spherodising
  • (B) annealing
  • (C) tempering
  • (D) normalizing
14 >>Transformation range for ferrous material is the temperature interval during which __________ is formed during its heating. ?
  • (A) cementite
  • (B) austenite
  • (C) martensite
  • (D) pearlite
15 >>Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an __________ body. ?
  • (A) grey
  • (B) black
  • (C) opaque
  • (D) white
16 >>In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that ?
  • (A) compared to the mass flow rate of cooling water, the rate of condensation of steam is invariably smaller.
  • (B) maintaining vacuum on tube side is more difficult than that on the shell side.
  • (C) water velocity can be increased conveniently to increase the overall heat transfer co-efficient because of its lower specific volume compared to steam.
  • (D) condenser can act as a storage unit for condensed steam.
17 >>Absolute zero pressure can be attained at a temperature of ?
  • (A) 0°C
  • (B) 50°K
  • (C) 0°R
  • (D) none of these
18 >>When the density of the reaction mixture is constant in a chemical reaction, the ratio of the mean residence time to space time is ?
  • (A) > 1
  • (B) < 1
  • (C) 1
  • (D) 0
19 >>If the demand for an item is trebled and the order cost is reduced to one third, then the economic order quantity ?
  • (A) is trebled.
  • (B) remains unchanged.
  • (C) decreases by a factor of 3.
  • (D) decreases by a factor of 1/3.
20 >>Copper deposits are found in India at the following location: ?
  • (A) Kudremukh
  • (B) Kolar
  • (C) Khetri
  • (D) Ramagundam

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