Latest Chemical Engineering Basics MCQs – Competitive Chemical Engineering MCQs
This post is comprising of latest ” Chemical Engineering Basics MCQs – Latest Competitive Chemical Engineering MCQs “. Here you’ll get latest mechanical engineering mcqs for written test, interview with answers. If you want to improve your knowledge regarding mechanical engineering then read these mcqs of Design of Steel Structures.
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:
Powder metallurgy process does not make metal powder by_________________________?
A. Grinding/milling
B. Atomisation
C. Hammering
D. Electrolytic deposition
With increase in steam pressure, its specific volume decreases ____________________?
A. Rapidly first and then slowly
B. Exponentially
C. Slowly first and then rapidly
D. Linearly
Wrought iron is not____________________?
A. Weldable easily
B. Ductile & resistant to corrosion/rusting
C. Having uniform strength in all directions
D. Having maximum tensile strength along the lines of slag distribution
Cast iron contains ____________________ percent carbon?
A. 2.5
B. 4.75
C. 3.75
D. 5.25
Transition from laminar to turbulent zone in free convection heat transfer is governed by the critical value of ?
A. Reynolds number
B. Grashoff number & Reynolds number
C. Grashoff number
D. Grashoff number & Prandtl number
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. Diameter & length of the pipe
B. Emissivity of pipe surface
C. Temperature of hot pipe surface & that of air in the room
D. None of these
Ammonia leakage in the refrigeration system is detected by_________________?
A. Sulphur stick, which on detection gives white smoke
B. Its smell
C. Using chemical reagents
D. Soap solution
Blast furnace slag is mainly molten_________________?
A. Magnesium silicate
B. Sand
C. Calcium silicate
D. Iron pyrite
The best lubricants for a machine working at high temperature & load is_________________?
A. Animal oils
B. Solid lubricant
C. Grease
D. Mineral oils
A high pressure boiler generates steam at a pressure greater than _____________________ kg/cm2 ?
A. 30
B. 10
C. 50
D. 80
Theoretical volume of oxygen required for complete combustion of 1Nm3 of acetylene, in oxy-acetylene welding is ______________ Nm3 ?
A. 1/3
B. 1
C. 0.5
D. 2.5
Titanium is added to molten aluminium alloys before casting for the purpose of_____________________?
A. Reducing porosity
B. Increasing corrosion resistance
C. Grain refinement
D. Improving fluidity
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. Gr, Gr0.25
C. Gr0.25, Gr0.33
D. Gr0.33, Gr0.25
Angular displacement can be measured suitably by a______________________?
A. Shaft encoder
B. Linear variable differential transducer (LVDT)
C. Tachometer
D. Stroboscope
Maximum hardenability of steel depends upon its_______________________?
A. Chemical composition
B. Grain size
C. Carbon content
D. Alloying elements content
Electrical conductivities of semi-conductors are of the order of ______________ ohm/cm ?
A. 10-3
B. 10-15
C. 103
D. 1015
The difference in one unit of Rockwell hardness number corresponds to a difference in the depth of indentation of ______________ mm ?
A. 0.01
B. 0.001
C. 0.002
D. 0.02
Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called_______________________?
A. Hardening
B. Tempering
C. Annealing
D. Normalising
Evaporative cooling process employs a combination of cooling and humidification in which the____________________?
A. Latent heat is removed
B. Sensible heat is removed and the latent heat is added
C. Sensible heat is added
D. Sensible heat is added and latent heat is removed
Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by_________________?
A. Convection
B. Conduction
C. Radiation
D. Both A. & B.
Nitriding of a steel part does not increase its__________________?
A. Grain size
B. Surface hardness
C. Fatigue limit
D. Wear resistance
Chromium molybdenum steel cannot be welded using ______________ welding ?
A. Oxy-acetylene
B. Electrical resistance
C. Thermit
D. Any of these
Which of the following fastening devices has a head at one end and a nut fitted to the other ?
A. Top bolt
B. Stud
C. Bolt
D. None of these
Chemical Reaction Mcqs
The elastic strain in copper is due to the__________________?
A. Motion of dislocations
B. Breakage of atomic bonds
C. Stretching of atomic bonds
D. None of the above
Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the ______________ temperature of air?
A. Wet bulb
B. Saturation
C. Dry bulb
D. Dew point
Factor of safety in machine design is defined as the ratio of ultimate stress to _____________ stress ?
A. Working
B. Yield
C. Bearing
D. None of these
Speisses is a mixture of the following ?
A. Arsenides of heavy metals
B. Iron, cobalt and nickel
C. Arsenides & antimonides of heavy metals
D. Antimonides of heavy metals
The difference between gross & net calorific values of fuel is due to the___________________?
A. Heat lost by radiation
B. Heat carried away by the steam from the moisture content of the fuel
C. Sensible heat carried away by the flue gases
D. Heat carried away by steam from the combustion of hydrogen in the fuel
The starting of a car takes time in winter, because the__________________?
A. Fuel supply for ignition is not sufficient
B. Octane number of fuel is decreased
C. Vaporisation of the fuel is decreased
D. Pour point of fuel decreases
Pressure required to increase the density of water by about 1% is ____________________ atmosphere?
A. 50
B. 10
C. 200
D. 1000
If the demand for an item is trebled and the order cost is reduced to one third, then the economic order quantity_________________?
A. Decreases by a factor of 3
B. Remains unchanged
C. Is trebled
D. Decreases by a factor of 1/3
A dense structure of grinding wheel is not used for the_____________________?
A. Ductile material
B. Brittle materials
C. Hard materials
D. Finishing cuts
Direct conversion of thermal energy to electrical energy is facilitated by the____________________?
A. Photo voltaic cell
B. Fuel cells
C. Magneto hydrodynamic generator
D. None of these
Annealing of white cast iron produces _____________________ iron?
A. Nodular
B. Grey
C. Malleable
D. Spheroidal
Cemented carbide tools are not suitable for cutting___________________?
A. Aluminium
B. Cast iron
C. Brass
D. Steel
Milk is fat dispersed in water. It is an example of__________________?
A. Gel
B. Emulsion
C. Suspension
D. Solution
Case hardening of a material is__________________?
A. Preceded by its tempering
B. Followed by tempering or carburising
C. Done to get a soft ductile interior with a very hard surface
D. Carried out to get extreme hardness in its core
According to thermodynamic Fahrenheit scale, the fundamental interval between ice point to steam point is__________________?
A. 180°
B. 32°
C. 212°
D. 273°
Energy of the sun arises mainly from __________________ reactions?
A. Fusion
B. Combustion
C. Fission
D. None of these
The phenomenon occurring during explosion of a hydrogen bomb is___________________?
A. Nuclear fusion
B. Nuclear fission
C. A combination of both nuclear fission & fusion
D. None of these
Which of the following has the highest value of refractive index ?
A. Distilled water
B. Diamond
C. Brine (sea water)
D. Glass
Resistance of an electrical conductor is proportional to its (where, l = length and A = crosssectional area of the conductor)________________?
A. l
B. A
C. A2
D. Both A. & B.
Thermit welding uses the following energy source ?
A. Heat generated by friction
B. Chemical energy
C. Energy of high velocity electrons
D. Electrical energy
An alloy of Fe – 0.4 % C is__________________?
A. Eutectoid steel
B. Hypo-eutectoid steel
C. Hyper-eutectoid steel
D. Cast iron
Out of the following, the ________________ pipe has the least corrosion resistance?
A. Copper
B. Mild steel
C. Cast iron
D. Wrought iron
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. Straight line
C. Hyperbolic
D. None of these
Lead is poured into the joints between two ___________________ pipes?
A. Cast iron
B. Concrete
C. Steel
D. Plastic
Reduction in the grain size reduces the _________________ of the material?
A. Tensile strength
B. Fatigue resistance
C. Creep resistance
D. All A, B. & C
Wrought iron is never shaped by__________________?
A. Casting
B. Forging
C. Cold working
D. Welding
Mild steel has _______________ crystal lattice structure?
A. Orthorhombic
B. Body centred cubic (bcc)
C. Face centred cubic (fcc)
D. Cubic
Diffusion co-efficient of a metal in a solid solution depends upon its ?
A. Temperature
B. Composition
C. Both A. & B.
D. Neither A. nor B
Chemical Heat Transfer Mcqs
The following type of bonding is strongly directional in solids ?
A. Ionic
B. Vander Waal’s
C. Metallic
D. Covalent
Which of the following is not a principal alloying element for the structural steel ?
A. Molybdenum
B. Manganese
C. Nickel
D. Chromium
Which of the following rays has the least wavelength ?
A. Infrared rays
B. Ultraviolet rays
C. Cosmic rays
D. X-rays
Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when_________________?
A. Strain rate is increased
B. Prior cold deformation is increased
C. Grain size is increased
D. Not affected by any of the above parameters
Corrosion of metals cannot be prevented by its__________________?
A. Tempering
B. Aluminising
C. Chromising
D. Alloying
Absolute zero pressure can be attained at a temperature of___________________?
A. 50°K
B. 0°C
C. 0°R
D. None of these
Recrystallisation temperature of steel is ______________________ °C?
A. 300
B. 50
C. 500
D. 800
Which of the following does not have a sharp melting point ?
A. Ice
B. Glass
C. Thoria
D. Pig iron
The usual energy consumption in electric arc furnace steel making is _____________ KWh/ton of steel ?
A. 1200 — 1500
B. 400 – 700
C. 60 – 100
D. 2000 – 2300
On being hit with a hammer, ___________________ will readily fracture?
A. Mild steel
B. Brass
C. Cast iron
D. Lead
Nuclear fission of one atom of uranium-235 produces the energy equivalent to about ____________ MeV?
A. 500
B. 200
C. 20
D. 2000
One face of a furnace wall is at 1030°C and the other face is exposed to room temperature (30°C). If the thermal conductivity of furnace wall is 3 W. m-1. k-1 and the wall thickness is 0.3 m, the maximum heat loss (in W/m) is____________________?
A. 900
B. 100
C. 9000
D. 10000
Fibre glass is a composite material of_________________?
A. Glass fibre in a polymer matrix
B. Polymer fibre in a glassy matrix
C. Glass fibre in a metallic matrix
D. Both ‘b’ & ‘c’
Stainless steel is welded using__________________?
A. Oxy-hydrogen flame
B. Oxy-acetylene flame
C. Arc welding
D. Inert gas arc welding
All of the following alloying elements of steel increases hardness but sacrifice ductility, except________________?
A. Nickel
B. Molybdenum
C. Vanadium
D. Chromium
The maximum thickness of the metal which can be welded using ultrasonic welding is _____________ mm ?
A. 10
B. 3
C. 0.5
D. 25
The best guide to judge the general quality of water is the measurement of its__________________?
A. Turbidity
B. Electrical conductivity
C. pH value
D. Dissolved oxygen content
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. Mica
C. Glass
D. Silver
Chemical Engineering Basics Mcqs
In case of simple harmonic motion, displacement is proportional to the_________________?
A. Velocity
B. Acceleration
C. Both of the above
D. Neither of the above
Which of the following is preferred for riveting ?
A. Lap joint
B. Butt joint
C. Either of the above
D. Neither of the above
Friction factor for fluid flow in pipe does not depend upon the________________?
A. Pipe length
B. Fluid density & viscosity
C. Pipe roughness
D. Mass flow rate of fluid
Alloys having more than 80% copper are generally more______________________?
A. Machinable
B. Corrosion resistant
C. Prone to season cracking
D. Abrasion resistant
__________________ is used for tying the steel columns to concrete foundation?
A. Eyebolt
B. Grouting
C. Anchor bolts
D. Refractory castables
Cobalt – 60 is used as a source of _____________ in medical therapy & industrial radiography?
A. α-rays
B. γ-rays
C. X-rays
D. β-rays
_______________ is the hardest oxide and is hence used where high wear resistance at high temperature is required?
A. Zirconia
B. Beryllium
C. Alumina
D. Magnesia
For preparation of porous bearings by powder metallurgy, preferred particle shape is___________________?
A. Spherical
B. Irregular
C. Nodular
D. No preferred shape
The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is ______________ BTU/hr?
A. 1000
B. 200
C. 100
D. 2000
Tin based white metals are used, where bearings are subjected to___________________?
A. High pressure & load
B. High temperature
C. Low pressure & load
D. Large surface wear
Hydro-cyclone is a____________________?
A. Dry classifier
B. wet classifier
C. Crusher
D. Magnetic separator
Which of the following does not discharge the dust collected as a dry solid?
A. Electrostatic precipitator
B. Wet scrubber
C. Gravity settling chamber
D. Bag filter
The friction factor for the turbulent fluid flow in a rough pipe does not depend upon the_________________?
A. Pipe roughness & pipe diameter
B. Type of flowing fluid
C. Fluid velocity
D. Both B. & C.
A solar cell converts the sunlight directly into ______________ energy?
A. Mechanical
B. Electrical
C. Thermal
D. Chemical
In extrusion of metals, which of the following statement is true ?
A. Redundant work is a function of the die angle
B. Speed of the extruded material is same as that of ram speed
C. Relative motion between the billet surface and the container wall is always present
D. Hollow ram is used for indirect extrusion
X-rays are__________________?
A. Negatively charged
B. Positively charged
C. Neutral
D. Of higher wavelength than visible light
Wrought iron does not have__________________?
A. Uniform strength in all directions
B. High ductility & corrosion resistance
C. Ability to hold protective coating
D. Easily weldable characteristics
Square steel key is normally strong in failure by shear & crushing. Keys are normally made of _______________ steel bars?
A. Forged
B. Cold rolled mild
C. Hot rolled mild
D. Machinable stainless
A jet engine turbine blade is normally manufactured by____________________?
A. Shell moulding
B. Forging
C. Investment casting
D. Pressure die casting
Fog is an example of colloidal system of___________________?
A. Solid dispersed in liquid
B. Solid dispersed in gas
C. Liquid dispersed in gas
D. Gas dispersed in liquid
_________________ is the most suitable lubricant for drawing mild steel wires?
A. Water
B. Kerosene
C. Sodium stearate
D. Lime water
Use of flux during soldering is done to__________________?
A. Increase fluidity of solder by lowering its melting temperature
B. Prevent oxide formation
C. Full up the joint gap
D. Wash away surplus solder
Metalloids________________?
A. Are not necessarily solids at room temperature
B. Act as electron donors with metals & as electron acceptor with non-metals
C. Are good conductor of heat & electricity
D. Are compounds that exhibit both metallic & non-metallic properties to some extent and are
exemplified by elements like germanium, silicon & boron
If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a _____________ reactor?
A. Fertile
B. Breeder
C. Critical
D. Heterogeneous
Aluminium is extracted from____________________?
A. Galena
B. Bauxite
C. Chalcocite
D. None of these
Out of the following, the joint produced by ______________ has the lowest
A. Soldering
B. Brazing
C. Welding
D. Riveting
Copper deposits are found in India at the following location ?
A. Kolar
B. Kudremukh
C. Khetri
D. Ramagundam
Which of the following is an undesirable property of slag produced during the Pyrometallurgical method of metal extraction from its ore ?
A. Low density
B. High thermal conductivity
C. High fusibility & fluidity
D. High chemical activity
Dies for wire drawing are generally made of__________________?
A. Mild steel
B. Carbides
C. Stainless steel
D. High carbon steel
Maximum consumption of limestone is in the ____________________ industry?
A. Cement
B. Iron and steel
C. Glass
D. Fertilizer
‘Ice point’ is designated on Fahrenheit temperature scale by__________________?
A. 62°
B. 32°
C. 0°
D. 212°