Latest Chemical Engineering MCQs – Chemical Engineering Basics MCQs
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Latest Chemical Engineering MCQs
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Latest Chemical Engineering Basics Mcqs
The most occurred mcqs of Chemical Engineering Basics in past papers. Past papers of Chemical Engineering Basics Mcqs. Past papers of Chemical Engineering Basics Mcqs . Mcqs are the necessary part of any competitive / job related exams. The Mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related Chemical Engineering Basics Mcqs. The Important series of Chemical Engineering Basics Mcqs are given below:
Name the safety device used to protect the boiler, when the water level falls below a minimum level ?
A. Blow off cock
B. Blow down valve
C. Fusible plug
D. Safety valve
Adhesives__________________?
A. Can’t be used in the form of pressure sensitive tapes
B. Cure instantaneously after application on a surface
C. Can’t join two dissimilar metals
D. None of these
Oxyacetylene reducing flame is used while carrying out welding on__________________?
A. Grey cast iron
B. Alloy steel
C. Mild steel
D. High carbon steel
While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen flame is about _____________ °C ?
A. 2400
B. 2000
C. 1800
D. 3000
Steel rods are normally used for concrete reinforcement because concrete and steel have almost equal_________________?
A. Compressive strength
B. Tensile strength
C. Young’s modulus
D. Thermal co-efficient of expansion
Out of the following, the most malleable material is________________?
A. Aluminium
B. Copper
C. Wrought iron
D. Lead
Pipelines carrying various utilities in chemical industries are identified by their colour codes. The color of pipeline carrying steam is__________________?
A. Green
B. Silver grey
C. Black
D. Yellow
The ‘transition temperature’ for ductile to brittle behavior of steel increases with increase in the _____________ content in steel?
A. Carbon
B. Manganese
C. Both of the above
D. Neither of the above
Increasing the carbon content of steel_________________?
A. Reduces the upper shelf energy
B. Increasing the ductility transition temperature
C. Decreases hardness
D. Decreases brittleness
Pick out the wrong statement about the machinability of metals. Machinability of a metal ?
A. Decreases with increase in hardness, in general
B. Decreases with increase in strain hardening tendencies
C. Depend on the composition, microstructure and physical & mechanical properties
D. Decreases with increases in tensile strength & decrease in grain size
Pick out the wrong statement?
A. Copper is the metal having the highest electronic conductivity
B. Glass transition temperature applies to ‘polymers’ but not to ‘glasses’
C. Covalent bonding formed by sharing of electrons is present in all semi-conductor materials
D. Hardenability & Weldability of metals are inversely related
Pick out the wrong statement ?
A. Permanent magnets are made of hard materials, whereas electromagnets require soft magnetic materials
B. A ferromagnetic material becomes paramagnetic above the ‘Curie temperature’
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
Pick out the wrong statement ?
A. Martempering of a material is a hardening process
B. Low carbon steel does not respond to the heat treatment for hardening of the material, hence it is subjected to case hardening or surface hardening processes like cyaniding, carburising, nitriding etc., which produces high carbon outer layers resulting in increase of surface hardness
C. Induction hardening and flame hardening techniques are also used for surface hardening
D. Both annealing and normalising release the internal stresses of the material besides improving the mechanical properties
Pick out the wrong statement ?
A. With increase in temperature, the electrical conductivity of intrinsic semi-conductor will
B. The electrical conductivity of gold is considerably reduced by alloying additions due to the decrease in electron movement
C. Recrystallisation temperature decreases with decrease in strain in a cold worked metal
D. Lead can creep under its own weight at room temperature
Pick out the wrong statement ?
A. In spot welding, two pieces to be joined are overlapped and placed between two electrodes
B. Electrode tip in spot welding is of copper and the tip diameter should be equal to t (where, t = plate thickness to be welded)
C. Seam welding, projection welding & spot welding are the classification of electrical resistance welding
D. Mild steel sheet cannot be spot welded
Pick out the correct statement?
A. Hot worked materials are subjected to annealing to remove internal stresses
B. Normalising of a material induces stresses
C. Annealing of steel hardens it slightly
D. Tempering of a material improves ductility & toughness but reduces hardness & brittleness
Pick out the correct statement about the condensation?
A. If a condensing liquid does not wet the surface dropwise, even then condensation will take place on it
B. Suitable coating or vapour additive is used to promote film wise condensation
C. Filmwise condensation gives a lower heat transfer rate than the dropwise condensation
D. Reynolds number of condensing liquid is based on its mass flow rate
Chemical Heat Transfer Mcqs
Spark plug is provided in a/an_________________?
A. Engine having carburettor
B. Compression ignition engine
C. Diesel engine
D. Both B. & C.
A solid aluminium ball, when quenched in a water bath maintained at 40°C, cools down from 550°C to 450°C in 20 seconds. The expected temperature of the ball after next 20 seconds may be about ____________________ °C?
A. 370
B. 320
C. 340
D. 300
For a small scale toy factory, the fixed cost per month is Rs. 5000/-. The variable cost per toy is Rs. 20 and sales price is Rs. 30 per toy. The break even production per month will be _________________ toys ?
A. 1000
B. 500
C. 250
D. 3000
In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is ______________ °C?
A. 60
B. 20
C. 120
D. ∞
Dislocation cross-slip is difficult in those materials, which have___________________?
A. High work hardening rate
B. Large number of slip systems
C. Coarse grain size
D. Low stacking fault energy
Cold chisel & hammers are made of_________________?
A. Forged steel
B. High carbon steel
C. High speed steel
D. Mild steel
Which of the following relationships is correct for relating the three elastic constants of an isotropic elastic material (where, E = Young’s modulus, G = Modulus of rigidity or shear modulus v = Poisson’s ratio) ?
A. E = 2G (1 + v)
B. E = 2G (1 + 2v)
C. E = G (1 + v)/2
D. E = G (1 + v)
The cathode in an electrochemical cell always carries____________________?
A. Negative charge
B. Zero charge
C. Positive charge
D. Positive or negative charge depending upon the nature of the cell
Multistage compression of air as compared to single stage compression offers the advantage of______________?
A. Increased volumetric efficiency
B. Moisture elimination in the inter-stage cooler
C. Power saving per unit weight of air delivered
D. All A , B. & C.
_________________ can replace tungsten in high speed steel ?
A. Vanadium
B. Chromium
C. Cobalt
D. Molybdenum
In electrical resistance welding, distortion results from the use of improper________________?
A. Clamping methods
B. Current
C. Electrodes
D. Filler material
Addition of ____________________ to steel does not help in improving its machinability?
A. Lead
B. Silicon
C. Sulphur
D. Phosphorous
Dew point temperature always gives an indication of the __________________ of the moist air ?
A. Dryness
B. Moisture content
C. Latent heat
D. Coolness
The most important consideration, while designing the refrigeration system of an aircraft is that the refrigeration system_________________?
A. Is as light as possible
B. Employs minimum quantity of refrigerant
C. Has very high C.O.P.
D. Consumer minimum horse power
Consumable electrodes are used in the ____________________ welding?
A. Thermit
B. Arc
C. Gas
D. Resistance
An oxidation process is accompanied with decrease in the____________________?
A. Number of electrons
B. Number of ions
C. Oxidation number
D. All A , B. & C.
With decrease in the grain size of a material, its creep resistance___________________?
A. Decreases
B. Increases
C. Remain constant
D. Either A. or B.; depends on the material
Austempering of steel requires it to be heated to 875°C followed by sudden cooling to 250- 525°C, thereby changing austenite to___________________?
A. Martensite
B. Bainite
C. Sorbite
D. Troostite
What is the percentage of chromium in 18-4-1 high speed steel ?
A. 4
B. 1
C. 18
D. 23
Electrometallurgical methods of metal extraction is normally used for those metals___________________?
A. Which fall in the category of alkali & alkaline earth metals
B. Whose oxide/ore is not reduced by carbon
C. Which stands higher in the electrochemical series of the metal
D. All A, B. & C.
Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat interaction of 3000 kJ causes the surroundings to be heated. Internal energy change of the gas during the compression is __________________ kJ ?
A. +4000
B. 10000
C. -4000
D. -10000
Hydrogen can be ________________?
A. Produced by electrolysis of water
B. Liquefied & stored under cryogenic conditions
C. Used in I.C. engines as fuel
D. All (A), B. & C.
Air standard Otto cycle is more efficient than the diesel cycle for the same__________________?
A. Heat addition & compression ratio
B. Compression ratio & pressure
C. Heat addition & pressure
D. Cylinder dimension & rpm
Percentage of argon (by volume) in dry atmospheric air is about________________?
A. 0.3
B. 0.09
C. 0.57
D. 0.94
_____________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C ?
A. Galvanising
B. Veneering
C. Electroplating
D. Calorising
Normalising of a casting does not__________________?
A. Induce stresses in it
B. Reduce segregation
C. Refine its grain structure
D. Improve its mechanical properties
Limestone addition in the blast furnace is done to flux _______________ present in the raw materials?
A. SiO2
B. MnO2
C. Al2O3
D. P
In case of brasses, with decreasing zinc percentage and increasing copper percentage, its _____________ increases ?
A. Percentage elongation
B. Tensile strength
C. Brinell hardness
D. All A, B & C
Metallic surveying tapes are made of _____________ which has a low co-efficient of expansion & enough strength ?
A. Invar
B. Duralumin
C. Hastelloy
D. Monel metal
Titanium is produced by ___________________ of Ti Cl4 ?
A. Calcium reduction
B. Electrolytic reduction
C. Magnesium reduction
D. Thermal dissociation
Atomic _______________ is a whole number for an element?
A. Number
B. Radius
C. Weight
D. None of these
Out of the following, the lowest packing of atoms exists in ____________________ crystal lattice structure?
A. Face centred cubic (fcc)
B. Hexagonal close, packed (hcp)
C. Body centred cubic (bcc)
D. Simple cubic
An abrupt and sudden fall in the reading of barometer is an indication of the____________________?
A. Storm
B. Clear weather
C. Rain
D. Cold wave
For the Stoke’s law to be valid in the case of a falling sphere in a fluid, the_____________________?
A. Reynolds number (based on sphere diameter) should be < 1
B. Fluid density should be constant
C. Sphere must be metallic
D. Flow around the sphere should be in turbulent region
Chemical Reaction Mcqs
Saturated steam at a pressure of 25 kg/cm2 is throttled to attain 5 kg/cm2. Then the outcoming steam will be_________________?
A. Saturated
B. Wet
C. Superheated
D. None of these
Which of the following is resistant to the action of both heat & chemicals ?
A. Borosilicate glass
B. Soda lime glass
C. Silica glass
D. None of these
The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for ______________ at room temperature ?
A. Mercury
B. Water
C. Air
D. Alcohol
______________ wire is never used for making the heating element ?
A. Kanthal
B. Nichrome
C. Invar
D. None of these
The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : Cp of copper is 23 J K-1mole-1) ?
A. 2300 J
B. 230 J
C. 4600 J
D. 2.3 × 106 J
The most suitable material for die casting is __________________?
A. Steel
B. Copper
C. Iron
D. Nickel
In a totally irreversible isothermal expansion process for an ideal gas, ΔE = 0, ΔH = 0. Then ΔQ and ΔS will be_______________?
A. ΔQ = 0, ΔS = -ve
B. ΔQ = 0, ΔS = +ve
C. ΔQ = 0, ΔS=0
D. ΔQ = +ve, ΔS= +ve
Which of the following materials does not form adherent oxide film on surface ?
A. Nickel
B. Copper
C. Aluminium
D. Gold & silver
The emf of a Deniell cell “Zn | Zn2+ || Cu2+ | Cu” can be increased by_________________?
A. Increasing the surface area of the electrodes
B. Increasing the concentration of zinc sulphate solution
C. Decreasing the surface area of the electrodes
D. Increasing the concentration of copper sulphate solution
Lead is poured into the joint between two ______________ pipes?
A. Concrete
B. Mild steel
C. Cast iron
D. Asbestos cement
In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the________________?
A. Approach is 10°F
B. Range is 15°F
C. Both A. & B.
D. Neither A. nor B.
The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 × 10-16 m2S-1 and it is 1.94 × 10-14 m2S- 1 at 1200 K. The activation energy (in k. J.mole-1) for the diffusion of Ni in Cu is_________________?
A. 180
B. 130
C. 230
D. 250
The critical pressure at which the latent heat of vaporization of steam becomes zero is _____________ Kg/cm2 ?
A. 100.03
B. 225.65
C. 273.15
D. 373.15
For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm3) while the C.V. is same on weight basis (i.e., kcal/kg) ?
A. Propane and LPG
B. Propane and acetylene
C. Sewage gas and gobar gas
D. B.F gas and coke oven gas
What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer co-efficient with the ambient atmosphere is 5 W/m2. °K? Thermal conductivity of metal and insulation material are 40 and 0.1 W/m.°K respectively ?
A. 2
B. 10
C. 8
D. 40
In the X-ray radiography technique, the tube voltage for thicker plates as compared to thin plates, should be________________?
A. Lower, as it gives higher wavelength
B. Higher, as it gives higher wavelength
C. Higher, as it gives shorter wavelength
D. Lower, as it gives shorter wavelength
A thin, flat & square plate measuring 2 m × 2 m is freely hanging in ambient air at 25°C. It is exposed to the solar radiation falling on one side of the plate at the rate of 500 W/m2. The plate temperature will remain constant at 30°C, if the convective heat transfer co-efficient is ________________ W/m2 °C ?
A. 150
B. 100
C. 50
D. 200
The taper provided on pattern for its easy & clean withdrawal from the mould is termed as the _______________ allowance ?
A. Pattern
B. Casting
C. Draft
D. Distortion
_______________ is the most important element, which controls the physical properties of steel ?
A. Silicon
B. Manganese
C. Carbon
D. Vanadium
________________ is the hardest material out of the following ?
A. Boron carbide
B. Hardened steel
C. Tungsten carbide
D. Silicon carbide
Chemical Engineering Basics Mcqs
Two solutions A1 & A2 have pH value of 2 & 6 respectively. It implies that the solution ?
A. A1 is more alkaline than solution A2
B. A2 is very slightly acidic
C. A1 is highly acidic
D. Both B. & C.
Cassiterite is an ore of_________________?
A. Tin
B. Molybdenum
C. Lead
D. Chromium
Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area; in the casting) ?
A. V/A2
B. V/A
C. V2/A
D. V2/A2
Cold chisel‟s hammers are made of___________________?
A. Forged steel
B. High carbon steel
C. High speed steel
D. Mild steel
LVDT used for displacement measurement is a/an _______________ Transducer?
A. Passive
B. Capacitive
C. Active
D. None of these
The swift cup test evaluates the following property of a sheet metal ?
A. Bendability
B. Drawability
C. Stretchability
D. None of these
The concentration of (H+) ions is 4 x 10-5 in a solution. Then pH of the solution will be (Given log 4 = 0.6) ?
A. 4.4
B. 8.4
C. 5.6
D. 2.4
Internal energy of a gas obeying Van-Der-Waals equation of state, [p + (a/v2)] (V – b) = RT, depends upon its___________________?
A. Pressure & temperature
B. Temperature & specific volume
C. Pressure & specific volume
D. Temperature only
Tip of the match stick contains a mixture of________________?
A. K + S + K2Cr2O7
B. K + S
C. S + K2Cr2O7 + White P
D. None of these
For efficient performance of a blast furnace, the extent of reduction of Wustite (FeO) should be___________________?
A. 100% direct reduction
B. 100% indirect reduction
C. 50-60% indirect reduction
D. 30-40% indirect reduction
Sand used to stop the green sand from sticking to the pattern is termed as the ______________ sand?
A. Parting
B. Loam
C. Synthetic
D. Dry
Methyl orange indicator turns_____________________?
A. Orange yellow in alkaline medium
B. Colourless in acidic medium
C. Orange yellow in acidic medium
D. Colourless in basic medium
A compact estimate about the amount of materials handling between various work stations is obtained from the_____________________?
A. Bin chart
B. Gantt chart
C. String diagram
D. Travel chart
Age hardening is connected with________________?
A. Gun metal
B. Babbitt metal
C. Stainless steel
D. Duralumin
Electrostatic separation of minerals from each other is based on their differences in the following property ?
A. Magnetic permeabilities
B. Densities
C. Electrical conductivities
D. Hardness
While the recrystallisation temperature for pure metals is 0.3 Tm, the same for alloys is equal to ______________ × Tm (where, Tm Melting temperature) ?
A. 0.45
B. 0.25
C. 0.70
D. 0.95
Which of the following properties of a solid is not dependent on crystal imperfection ?
A. Semi-conductivity
B. Ductility
C. Melting point
D. Yield stress
The behaviour of a metal specimen, which when plastically strained in tension reduces its yield stress in compression and vice versa; is termed as the_______________?
A. Creeping effect
B. Bauschinger effect
C. Work hardening
D. Stress recovery effect
Yield strength of a polycrystalline metal with an average grain size „d’, is proportional to ____________________?
A. d
B. d-1/2
C. d1/2
D. d-1
The passage between the nozzle and the _______________________ is called ‘sprue’ in case of injection moulding?
A. Runner
B. Mold
C. Cylinder
D. None of these
The condition of diffraction from a crystal is given by______________?
A. nλ = 2d Sin θ
B. λ = 2d Sin 2θ
C. λ = d Sin 2θ
D. nλ = d Sin θ
The life of a ball bearing is inversely proportional to________________?
A. (Load)2
B. (Load)1
C. (Load)3
D. (Load)0.33
Corrosion rate cannot be lowered by reducing the ________________ of the corroding medium?
A. Concentration
B. Temperature
C. Velocity
D. None of these
The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe) ?
A. D
B. A
C. 1/A
D. 1/A2
In case of compression of one kg of air, the work done will be the least, when the value of polytropic index ‘n’ is______________________?
A. 1
B. 1.5
C. 1.4
D. Y = Cp/Cv
Consider an ideal solution of components A and B. The entropy of mixing per mole of an alloy containing 50% B is_______________?
A. R ln 2
B. 3 R ln 2
C. -R ln 2
D. -3R ln 2
For grinding of softer materials, the grinding wheel should have _________________ grain size ?
A. Medium
B. Coarser
C. Finer
D. Any type of
A furnace is made of a refractory brick wall of thickness 0.5 metre and thermal conductivity 0.7 W/m.°K For the same temperature drop and heat loss, this refractory wall can be replaced by a layer of diatomaceous earth of thermal conductivity 0.14 W/m.K and thickness ______________ metre?
A. 0.25
B. 0.1
C. 0.01
D. 0.5
Production of one ton of paper in Indian paper industry consumes about ____________ kWh of electricity ?
A. 800
B. 300
C. 1400
D. 2000