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Chemical Engineering Basics MCQ Questions & Answers

Chemical Engineering Basics MCQs : This section focuses on the "Chemical Engineering Basics". These Multiple Choice Questions (MCQs) should be practiced to improve the Chemical Engineering Basics skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

Question 1

Energy of the sun arises mainly from __________ reactions.

A. fusion
B. fission
C. combustion
D. none of these

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Question 2

Speisses is a mixture of the following:

A. Arsenides of heavy metals.
B. Antimonides of heavy metals.
C. Arsenides & antimonides of heavy metals.
D. Iron, cobalt and nickel.

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Question 3

In troposphere (the weather domain), the temperature 't' at height 'h' above the sea level in metres is given by (where, temperature at sea level is 15°C and t is in °C.)

A. t = 15 - 0.0065 h
B. t = 15 + 0.0065 h
C. t = 0.0035 h - 15
D. t = 15 - 0.0035 h

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Question 4

Maximum permissible air velocity in pipelines is about __________ metre/second.

A. 5
B. 10
C. 20
D. 40

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Question 5

Nuclear fission of one atom of uranium-235 produces the energy equivalent to about __________ MeV.

A. 20
B. 200
C. 500
D. 1000

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Question 6

Transformation range for ferrous material is the temperature interval during which __________ is formed during its heating.

A. cementite
B. austenite
C. martensite
D. pearlite

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Question 7

Electrical conductivities of semi-conductors are of the order of __________ ohm/cm.

A. 10-Mar
B. 103
C. Oct-15
D. l015

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Question 8

Friction factor for fluid flow in pipe does not depend upon the

A. pipe length.
B. pipe roughness.
C. fluid density & viscosity.
D. mass flow rate of fluid.

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Question 9

Sudden fall of atmospheric pressure by a large amount is an indication of the

A. rain
B. cold wave
C. storm
D. fair weather

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Question 10

Which of the following is not an explosive ?

D. Lead azide

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Question 11

Tin based white metals are used, where bearings are subjected to

A. high pressure & load.
B. low pressure & load.
C. high temperature.
D. large surface wear.

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Question 12

Which one of the following is incombustible ?

A. H2
B. CCl4
C. C2H2
D. S

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Question 13

Cobalt - 60 is used as a source of __________ in medical therapy & industrial radiography.

A. X-rays
B. γ-rays
C. α-rays
D. β-rays

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Question 14

The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used. For general purpose cutter grinding __________ grinding wheel is normally used.

A. hard
B. soft
C. silicon carbide
D. aluminium oxide

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Question 15

The following type of bonding is strongly directional in solids.

A. Vander Waal's
B. Ionic
C. Metallic
D. Covalant

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Question 16

Chromium molybdenum steel can not be welded using __________ welding.

A. thermit
B. electrical resistance
C. oxy-acetylene
D. any of these

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Question 17

Maxwell's thermodynamic relations applies to the

A. chemical systems in equilibrium.
B. mechanical systems in equilibrium.
C. irreversible thermodynamic processes.
D. reversible thermodynamic processes.

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Question 18

A solar cell converts the sunlight directly into __________ energy.

A. thermal
B. electrical
C. mechanical
D. chemical

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Question 19

Copper deposits are found in India at the following location:

A. Kudremukh
B. Kolar
C. Khetri
D. Ramagundam

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Question 20

Titanium alloys are welded using the Following process:

A. TIG welding.
B. Submerged arc welding.
C. Butt welding.
D. Electron beam welding.

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Question 21

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.

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Question 22

Which of the following fastening devices has a head at one end and a nut fitted to the other ?

A. Bolt
B. Stud
C. Top bolt
D. None of these

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Question 23

Fog is an example of colloidal system of

A. solid dispersed in gas.
B. solid dispersed in liquid.
C. liquid dispersed in gas.
D. gas dispersed in liquid.

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Question 24

If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________ reactor.

A. critical
B. breeder
C. fertile
D. heterogenous

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Question 25

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

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Question 26

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

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Question 27

An alloy of Fe - 0.4 % C is

A. cast iron.
B. hypo-eutectoid steel.
C. hyper-eutectoid steel.
D. eutectoid steel

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Question 28

Wrought iron is never shaped by

A. casting
B. cold working
C. forging
D. welding

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Question 29

A high pressure boiler generates steam at a pressure greater than __________ kg/cm2 .

A. 10
B. 30
C. 50
D. 80

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Question 30

Transition from laminar to turbulent zone in free convection heat transfer is governed by the critical value of

A. Grashoff number.
B. Grashoff number & Reynolds number.
C. Reynolds number.
D. Grashoff number & Prandtl number.

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Question 31

Absolute zero pressure can be attained at a temperature of

A. 0°C
B. 50°K
C. 0°R
D. none of these

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Question 32

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.

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Question 33

Powder metallurgy process does not make metal powder by

A. atomisation
B. grinding/milling
C. hammering
D. electrolytic deposition

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Question 34

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.

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Question 35

Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as

A. Gr0.25, Gr
B. Gr0.25, Gr0.33
C. Gr, Gr0.25
D. Gr0.33, Gr0.25

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Question 36

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.

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Question 37

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.

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Question 38

Auto collimator is used to check

A. flatness
B. angle
C. rotor balancing
D. roughness

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Question 39

Annealing ofwhite cast iron produces __________ iron.

A. grey
B. nodular
C. malleable
D. spheroidal

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Question 40

Resistance of an electrical conductor is proportional to its (where, l = length and A = cross-sectional area of the conductor)

A. A
B. l
C. A2
D. both 'a' & 'b'

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Question 41

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

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Question 42

The product out from a cupola is called

A. wrought iron
B. pig iron
C. cast iron
D. none of these

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Question 43

Corrosion of metals can not be prevented by its

A. tempering
B. chromising
C. aluminising
D. alloying

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Question 44

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.

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Question 45

All of the following alloying elements of steel increases hardness but sacrifice ductility, except

A. nickel
B. vanadium
C. molybdenum
D. chromium

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Question 46

__________ 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

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Question 47

Evaporative cooling process employs a combination of cooling and humidification in which the

A. sensible heat is added.
B. sensible heat is removed and the latent heat is added.
C. latent heat is removed.
D. sensible heat is added and latent heat is removed.

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Question 48

The most economical channel section for the fluid flow is the one for which the discharge is maximum for a given cross-sectional area. Vertical velocity distribution in an open channel for laminar flow can be assumed to be

A. parabolic
B. hyperbolic
C. straight line
D. none of these

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Question 49

Machinability of hard alloys and tool steels is improved by

A. spherodising
B. annealing
C. tempering
D. normalising

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Question 50

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

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