Chemical Engineering Basics MCQs

Option A: Higher, as it gives higher wavelength

Option B: Lower, as it gives higher wavelength

Option C: Higher, as it gives shorter wavelength

Option D: Lower, as it gives shorter wavelength

Correct Answer: Higher, as it gives shorter wavelength ✔

Option A: 2

Option B: 8

Option C: 10

Option D: 40

Correct Answer: 2 ✔

Option A: Propane and acetylene

Option B: Propane and LPG

Option C: Sewage gas and gobar gas

Option D: B.F gas and coke oven gas

Correct Answer: B.F gas and coke oven gas ✔

Option A: 273.15

Option B: 225.65

Option C: 100.03

Option D: 373.15

Correct Answer: 225.65 ✔

Option A: 130

Option B: 180

Option C: 230

Option D: 250

Correct Answer: 230 ✔

Option A: Range is 15°F

Option B: Approach is 10°F

Option C: Both A. & B.

Option D: Neither A. nor B.

Correct Answer: C. Both A. & B. ✔

Option A: Mild steel

Option B: Concrete

Option C: Cast iron

Option D: Asbestos cement

Correct Answer: Cast iron ✔

Option A: Decreasing the surface area of the electrodes

Option B: Increasing the concentration of zinc sulphate solution

Option C: Increasing the surface area of the electrodes

Option D: Increasing the concentration of copper sulphate solution

Correct Answer: Increasing the concentration of copper sulphate solution ✔

Option A: Copper

Option B: Nickel

Option C: Aluminium

Option D: Gold & silver

Correct Answer: Gold & silver ✔

Option A: ΔQ = 0, ΔS=0

Option B: ΔQ = 0, ΔS = +ve

Option C: ΔQ = 0, ΔS = -ve

Option D: ΔQ = +ve, ΔS= +ve

Correct Answer: ΔQ = 0, ΔS = +ve ✔

Option A: Iron

Option B: Copper

Option C: Steel

Option D: Nickel

Correct Answer: Copper ✔

Option A: 2300 J

Option B: 4600 J

Option C: 230 J

Option D: 2.3 × 106 J

Correct Answer: 2300 J ✔

Option A: Nichrome

Option B: Kanthal

Option C: Invar

Option D: None of these

Correct Answer: Invar ✔

Option A: Air

Option B: Water

Option C: Mercury

Option D: Alcohol

Correct Answer: Water ✔

Option A: Borosilicate glass

Option B: Silica glass

Option C: Soda lime glass

Option D: None of these

Correct Answer: Borosilicate glass ✔

Option A: Wet

Option B: Saturated

Option C: Superheated

Option D: None of these

Correct Answer: Superheated ✔

Option A: Reynolds number (based on sphere diameter) should be < 1

Option B: Flow around the sphere should be in turbulent region

Option C: Sphere must be metallic

Option D: Fluid density should be constant

Correct Answer: Sphere must be metallic ✔

Option A: Storm

Option B: Rain

Option C: Clear weather

Option D: Cold wave

Correct Answer: Storm ✔

Option A: Hexagonal close, packed (hcp)

Option B: Face centred cubic (fcc)

Option C: Body centred cubic (bcc)

Option D: Simple cubic

Correct Answer: Simple cubic ✔

Option A: Number

Option B: Weight

Option C: Radius

Option D: None of these

Correct Answer: Number ✔

Option A: Electrolytic reduction

Option B: Calcium reduction

Option C: Magnesium reduction

Option D: Thermal dissociation

Correct Answer: Magnesium reduction ✔

Option A: Invar

Option B: Hastelloy

Option C: Duralumin

Option D: Monel metal

Correct Answer: Invar ✔

Option A: Percentage elongation

Option B: Brinell hardness

Option C: Tensile strength

Option D: All A, B & C

Correct Answer: Percentage elongation ✔

Option A: SiO2

Option B: Al2O3

Option C: MnO2

Option D: P

Correct Answer: SiO2 ✔

Option A: Induce stresses in it

Option B: Refine its grain structure

Option C: Reduce segregation

Option D: Improve its mechanical properties

Correct Answer: Induce stresses in it ✔

Option A: Veneering

Option B: Galvanising

Option C: Electroplating

Option D: Calorising

Correct Answer: Calorising ✔

Option A: 0.09

Option B: 0.3

Option C: 0.57

Option D: 0.94

Correct Answer: 0.94 ✔

Option A: Heat addition & compression ratio

Option B: Heat addition & pressure

Option C: Compression ratio & pressure

Option D: Cylinder dimension & rpm

Correct Answer: Heat addition & compression ratio ✔

Option A: Used in I.C. engines as fuel

Option B: Liquefied & stored under cryogenic conditions

Option C: Produced by electrolysis of water

Option D: All (A), B. & C.

Correct Answer: D. All (A), B. & C. ✔

Option A: +4000

Option B: -4000

Option C: 10000

Option D: -10000

Correct Answer: +4000 ✔

Option A: Whose oxide/ore is not reduced by carbon

Option B: Which fall in the category of alkali & alkaline earth metals

Option C: Which stands higher in the electrochemical series of the metal

Option D: All A, B. & C.

Correct Answer: D. All A, B. & C. ✔

Option A: 1

Option B: 4

Option C: 18

Option D: 23

Correct Answer: 1 ✔

Option A: Sorbite

Option B: Bainite

Option C: Martensite

Option D: Troostite

Correct Answer: Bainite ✔

Option A: Increases

Option B: Decreases

Option C: Remain constant

Option D: Either A. or B.; depends on the material

Correct Answer: Remain constant ✔

Option A: Number of electrons

Option B: Oxidation number

Option C: Number of ions

Option D: All A , B. & C.

Correct Answer: Number of electrons ✔

Option A: Gas

Option B: Arc

Option C: Thermit

Option D: Resistance

Correct Answer: Arc ✔

Option A: Is as light as possible

Option B: Has very high C.O.P.

Option C: Employs minimum quantity of refrigerant

Option D: Consumer minimum horse power

Correct Answer: Is as light as possible ✔

Option A: Dryness

Option B: Moisture content

Option C: Coolness

Option D: Latent heat

Correct Answer: Moisture content ✔

Option A: Sulphur

Option B: Silicon

Option C: Lead

Option D: Phosphorous

Correct Answer: Silicon ✔

Option A: Clamping methods

Option B: Electrodes

Option C: Current

Option D: Filler material

Correct Answer: Clamping methods ✔

Option A: Chromium

Option B: Vanadium

Option C: Cobalt

Option D: Molybdenum

Correct Answer: Cobalt ✔

Option A: Power saving per unit weight of air delivered

Option B: Moisture elimination in the inter-stage cooler

Option C: Increased volumetric efficiency

Option D: All A , B. & C.

Correct Answer: D. All A , B. & C. ✔

Option A: Negative charge

Option B: Positive charge

Option C: Zero charge

Option D: Positive or negative charge depending upon the nature of the cell

Correct Answer: Negative charge ✔

Option A: E = 2G (1 + v)

Option B: E = G (1 + v)

Option C: E = G (1 + v)/2

Option D: E = 2G (1 + 2v)

Correct Answer: E = 2G (1 + v) ✔

Option A: High speed steel

Option B: High carbon steel

Option C: Forged steel

Option D: Mild steel

Correct Answer: High carbon steel ✔

Option A: Large number of slip systems

Option B: High work hardening rate

Option C: Coarse grain size

Option D: Low stacking fault energy

Correct Answer: Low stacking fault energy ✔

Option A: 20

Option B: 60

Option C: 120

Option D: ∞

Correct Answer: ∞ ✔

Option A: 250

Option B: 500

Option C: 1000

Option D: 3000

Correct Answer: 500 ✔

Option A: 370

Option B: 340

Option C: 320

Option D: 300

Correct Answer: 370 ✔

Option A: Engine having carburettor

Option B: Diesel engine

Option C: Compression ignition engine

Option D: Both B. & C.

Correct Answer: Engine having carburettor ✔

Option A: Filmwise condensation gives a lower heat transfer rate than the dropwise condensation

Option B: Suitable coating or vapour additive is used to promote film wise condensation

Option C: If a condensing liquid does not wet the surface dropwise, even then condensation will take

Option D: Reynolds number of condensing liquid is based on its mass flow rate

Correct Answer: Suitable coating or vapour additive is used to promote film wise condensation ✔

Option A: Hot worked materials are subjected to annealing to remove internal stresses

Option B: Annealing of steel hardens it slightly

Option C: Normalising of a material induces stresses

Option D: Tempering of a material improves ductility & toughness but reduces hardness & brittleness

Correct Answer: Tempering of a material improves ductility & toughness but reduces hardness & brittleness ✔

Option A: Seam welding, projection welding & spot welding are the classification of electrical resistance

Option B: Electrode tip in spot welding is of copper and the tip diameter should be equal to t (where, t =

Option C: In spot welding, two pieces to be joined are overlapped and placed between two electrodes

Option D: Mild steel sheet cannot be spot welded

Correct Answer: Mild steel sheet cannot be spot welded ✔

Option A: Lead can creep under its own weight at room temperature

Option B: The electrical conductivity of gold is considerably reduced by alloying additions due to the

Option C: Recrystallisation temperature decreases with decrease in strain in a cold worked metal

Option D: With increase in temperature, the electrical conductivity of intrinsic semi-conductor will

Correct Answer: Recrystallisation temperature decreases with decrease in strain in a cold worked metal ✔

Option A: Both annealing and normalising release the internal stresses of the material besides improving

Option B: Low carbon steel does not respond to the heat treatment for hardening of the material, hence it

Option C: Induction hardening and flame hardening techniques are also used for surface hardening

Option D: Martempering of a material is a hardening process

Correct Answer: Induction hardening and flame hardening techniques are also used for surface hardening ✔

Option A: A ferromagnetic material becomes paramagnetic above the ‘Curie temperature’

Option B: Permanent magnets are made of hard materials, whereas electromagnets require soft magnetic

Option C: Soft magnetic materials (e.g., pure iron) have higher permeability and low hysterisis loss and

Option D: Tungsten steel and alnico are not hard magnetic materials

Correct Answer: Tungsten steel and alnico are not hard magnetic materials ✔

Option A: Copper is the metal having the highest electronic conductivity

Option B: Hardenability & Weldability of metals are inversely related

Option C: Covalent bonding formed by sharing of electrons is present in all semi-conductor materials

Option D: Glass transition temperature applies to ‘polymers’ but not to ‘glasses’

Correct Answer: Copper is the metal having the highest electronic conductivity ✔

Option A: Decreases with increase in strain hardening tendencies

Option B: Decreases with increase in hardness, in general

Option C: Depend on the composition, microstructure and physical & mechanical properties

Option D: Decreases with increases in tensile strength & decrease in grain size

Correct Answer: Decreases with increases in tensile strength & decrease in grain size ✔

Option A: Reduces the upper shelf energy

Option B: Increasing the ductility transition temperature

Option C: Decreases brittleness

Option D: Decreases hardness

Correct Answer: Increasing the ductility transition temperature ✔

Option A: Carbon

Option B: Manganese

Option C: Both A nor B

Option D: Neither A nor B

Correct Answer: Carbon ✔

Option A: Black

Option B: Silver grey

Option C: Green

Option D: Yellow

Correct Answer: Silver grey ✔

Option A: Copper

Option B: Aluminium

Option C: Wrought iron

Option D: Lead

Correct Answer: Lead ✔

Option A: Tensile strength

Option B: Compressive strength

Option C: Young’s modulus

Option D: Thermal co-efficient of expansion

Correct Answer: Thermal co-efficient of expansion ✔

Option A: 1800

Option B: 2000

Option C: 2400

Option D: 3000

Correct Answer: 2000 ✔

Option A: Alloy steel

Option B: Grey cast iron

Option C: Mild steel

Option D: High carbon steel

Correct Answer: Mild steel ✔

Option A: Can’t be used in the form of pressure sensitive tapes

Option B: Can’t join two dissimilar metals

Option C: Cure instantaneously after application on a surface

Option D: None of these

Correct Answer: None of these ✔

Option A: Blow down valve

Option B: Blow off cock

Option C: Fusible plug

Option D: Safety valve

Correct Answer: Fusible plug ✔

Option A: Natural

Option B: Neoprene

Option C: Butadiene

Option D: Nitrile

Correct Answer: Neoprene ✔

Option A: Independent of

Option B: Inversely proportional to

Option C: Directly proportional to

Option D: None of these

Correct Answer: Directly proportional to ✔

Option A: Extrusion

Option B: Rolling

Option C: Deep drawing

Option D: Wire drawing

Correct Answer: Deep drawing ✔

Option A: Sequence of operation to be performed

Option B: Progress of work performed

Option C: Authorisation of work to be performed

Option D: Balancing of load on machines

Correct Answer: Sequence of operation to be performed ✔

Option A: Slush

Option B: Die

Option C: Investment

Option D: True centrifugal

Correct Answer: True centrifugal ✔

Option A: Haemoglobin

Option B: Chlorophyll

Option C: Hypo solution

Option D: None of these

Correct Answer: Chlorophyll ✔

Option A: Deuterium

Option B: Hydrogen

Option C: Neon

Option D: Helium

Correct Answer: Hydrogen ✔

Option A: High speed steel

Option B: Carbide

Option C: Cast alloy

Option D: Plain carbon steel

Correct Answer: Carbide ✔

Option A: Carbon

Option B: Aluminium

Option C: Silver

Option D: Stainless steel

Correct Answer: Carbon ✔

Option A: R

Option B: -R

Option C: 0

Option D: (3/2) R

Correct Answer: R ✔

Option A: Non-crystalline organic polymeric

Option B: Ceramic

Option C: All crystalline

Option D: All amorphous

Correct Answer: Non-crystalline organic polymeric ✔

Option A: Compact & rugged construction with an accuracy of 0.1 to 1%

Option B: No moving parts and incurs negligible deflection under load

Option C: Provision of thermal compensation and is hermetically sealed

Option D: All A, B & C

Correct Answer: All A, B & C ✔

Option A: Can be determined only experimentally

Option B: Can be determined from the stoichiometry of the reaction

Option C: Cannot be zero

Option D: Can be fractional

Correct Answer: Can be determined from the stoichiometry of the reaction ✔

Option A: Semi-conductor

Option B: Metal or alloy

Option C: Dielectric

Option D: None of these

Correct Answer: Semi-conductor ✔

Option A: Alumina

Option B: Alkali oxide

Option C: Lime & Magnesia

Option D: None of these

Correct Answer: Lime & Magnesia ✔

Option A: Glass

Option B: Diamond

Option C: Brine

Option D: Kerosene

Correct Answer: Diamond ✔

Option A: Carbon and silicon should be low

Option B: Silicon should be low but carbon should be high

Option C: Both silicon & carbon should be high

Option D: Silicon should be high but carbon should be low

Correct Answer: Carbon and silicon should be low ✔

Option A: Pure oxygen has been used for combustion

Option B: Nitrogen percentage in the fuel is very high

Option C: Excess air has been used for combustion

Option D: Hydrogen is not present in the fuel

Correct Answer: Excess air has been used for combustion ✔

Option A: Direct arc

Option B: Indirect arc

Option C: Resistance

Option D: Induction

Correct Answer: Indirect arc ✔

Option A: Equivalent weight

Option B: (Equivalent weight)2

Option C: Molecular weight

Option D: (Molecular weight)2

Correct Answer: Equivalent weight ✔

Option A: Hot metal

Option B: Flue gases

Option C: Slag

Option D: Refractory lining

Correct Answer: Hot metal ✔

Option A: Carbon dioxide

Option B: Water

Option C: Mercury

Option D: None of these

Correct Answer: Water ✔

Option A: Boundary

Option B: Hydrodynamic

Option C: Hydrostatic

Option D: Mixed/semi-fluid

Correct Answer: Hydrostatic ✔

Option A: Water

Option B: Steam

Option C: Foam

Option D: Nitrogen

Correct Answer: Nitrogen ✔

Option A: Copper

Option B: Zinc

Option C: Tin

Option D: Aluminium

Correct Answer: Tin ✔

Option A: Fracture

Option B: Dislocation

Option C: Slip

Option D: Twinning

Correct Answer: Slip ✔

Option A: 150-300

Option B: 400-500

Option C: 650-800

Option D: 1000-1100

Correct Answer: 150-300 ✔

Option A: Determination of elastic constant

Option B: Detection of defects in metal

Option C: Measurement of material thickness

Option D: None of the above

Correct Answer: Detection of defects in metal ✔

Option A: Formability

Option B: Yield strength

Option C: Toughness

Option D: Resilience

Correct Answer: Formability ✔

Option A: Make the plate softer

Option B: Burn oil & grease sticking to plate surfaces

Option C: Avoid plate distortion

Option D: Prevent cold cracks

Correct Answer: Prevent cold cracks ✔

Option A: Liquid iron

Option B: Solid iron

Option C: Sponge iron

Option D: Iron saturated with carbon

Correct Answer: Sponge iron ✔

Option A: 8.82

Option B: 9.81

Option C: 10.88

Option D: 0.95

Correct Answer: 8.82 ✔

Option A: Decreases & increases

Option B: Increases & increases

Option C: Increases & decreases

Option D: Decreases & decreases

Correct Answer: Decreases & increases ✔