Chemical Engineering Basics MCQs

Option A: 7

Option B: 10

Option C: 12

Option D: 17

Correct Answer: 7 ✔

Option A: Pitting

Option B: Corrosion

Option C: Erosion

Option D: None of these

Correct Answer: Erosion ✔

Option A: Fracture strength

Option B: Yield strength

Option C: Elastic limit

Option D: Limit of proportionality

Correct Answer: Fracture strength ✔

Option A: Body centred cubic (bcc)

Option B: Hexagonal close packed (hcp)

Option C: Face centred cubic (fcc)

Option D: None of these

Correct Answer: Face centred cubic (fcc) ✔

Option A: Elastic limit

Option B: Machining properties

Option C: Ductility

Option D: Resilience

Correct Answer: Elastic limit ✔

Option A: 1.2 to 2.5

Option B: 4.5 to 6.2

Option C: 7.5 to 8.5

Option D: 10.5 to 15.5

Correct Answer: 4.5 to 6.2 ✔

Option A: Medium carbon steel

Option B: High carbon steel

Option C: Cast iron

Option D: Wrought iron

Correct Answer: High carbon steel ✔

Option A: Increases

Option B: Decreases

Option C: Remain same

Option D: May increase or decrease (depends on the suction pressure)

Correct Answer: Increases ✔

Option A: Steel

Option B: Cast iron

Option C: Aluminium

Option D: None of these

Correct Answer: Cast iron ✔

Option A: Increases

Option B: Decreases

Option C: Remain constant

Option D: Increases linearly

Correct Answer: Decreases ✔

Option A: Manganese

Option B: Magnesium

Option C: Vanadium

Option D: Copper

Correct Answer: Manganese ✔

Option A: 15 to 25

Option B: 5 to 10

Option C: 40 to 55

Option D: 60 to 70

Correct Answer: 15 to 25 ✔

Option A: Carbon

Option B: Volatile matter

Option C: Ash

Option D: Moisture

Correct Answer: Moisture ✔

Option A: Silica

Option B: Alumina

Option C: Magnesia

Option D: Fireclay

Correct Answer: Magnesia ✔

Option A: gm .cm-1 sec-1

Option B: gm . cm2 . sec-2

Option C: gm .cm-2, sec-1

Option D: gm . cm . sec-1

Correct Answer: gm .cm-1 sec-1 ✔

Option A: Precedence relationship

Option B: Resource idleness

Option C: Resource restriction

Option D: Necessary time delay

Correct Answer: Precedence relationship ✔

Option A: Flanged iron

Option B: Collar

Option C: Flexible

Option D: Expansion

Correct Answer: Collar ✔

Option A: Entropy

Option B: Pressure

Option C: Volume

Option D: Heat

Correct Answer: Heat ✔

Option A: Lead

Option B: Zinc

Option C: Aluminium

Option D: Copper

Correct Answer: Copper ✔

Option A: 159

Option B: 1837

Option C: 2537

Option D: 10000

Correct Answer: 2537 ✔

Option A: Cavitation

Option B: Frictional losses

Option C: Kinetic energy loss

Option D: Static head

Correct Answer: Kinetic energy loss ✔

Option A: Martensitic

Option B: Bainitic

Option C: Carburised

Option D: Stressed

Correct Answer: Bainitic ✔

Option A: H

Option B: H/2

Option C: H/4

Option D: H/6

Correct Answer: H ✔

Option A: Cast iron

Option B: Soft brass

Option C: Round specimen of ductile metal

Option D: Flat tensile specimen of ductile metal

Correct Answer: Round specimen of ductile metal ✔

Option A: Travel in a straight line

Option B: Get deflected by magnetic electric field

Option C: Produce fluorescence

Option D: Heat the exposed material

Correct Answer: Get deflected by magnetic electric field ✔

Option A: Cotton, silk and paper

Option B: Asbestos, glass, porcelain and mica

Option C: Rubber and polymeric resins

Option D: All refractory materials

Correct Answer: Rubber and polymeric resins ✔

Option A: Asbestos cement

Option B: Steel

Option C: Cement concrete

Option D: Stoneware

Correct Answer: Steel ✔

Option A: Jet of water at high pressure

Option B: Blast of air

Option C: Mixture of water and air

Option D: Rain of molten lead

Correct Answer: Rain of molten lead ✔

Option A: Plates

Option B: Rods

Option C: Tubes

Option D: Wires

Correct Answer: Tubes ✔

Option A: Outside

Option B: Inside

Option C: Mean

Option D: None of these

Correct Answer: Outside ✔

Option A: High temperature heating medium (a petroleum product)

Option B: Product of coal tar distillation

Option C: Very heat sensitive material

Option D: None of these

Correct Answer: High temperature heating medium (a petroleum product) ✔

Option A: Impact

Option B: Torsion

Option C: Hardness

Option D: Charpy

Correct Answer: Hardness ✔

Option A: Nickel, cobalt & chromium

Option B: Tungsten, chromium & cobalt

Option C: Manganese, chromium & cobalt

Option D: Tungsten, molybdenum & nickel

Correct Answer: Tungsten, chromium & cobalt ✔

Option A: 5

Option B: 10

Option C: 20

Option D: 35

Correct Answer: 20 ✔

Option A: Sulphur

Option B: Silicon

Option C: Lead

Option D: Phosphorous

Correct Answer: Silicon ✔

Option A: Aqueous tension

Option B: Saturated humidity

Option C: Vapor pressure

Option D: Absolute humidity

Correct Answer: Aqueous tension ✔

Option A: Vacancy

Option B: Dislocation

Option C: Grain boundary

Option D: All of these

Correct Answer: All of these ✔

Option A: Ammonium hydroxide

Option B: Sodium carbonate

Option C: Sodium hydroxide

Option D: Ammonium carbonate

Correct Answer: Sodium carbonate ✔

Option A: Temperature is low

Option B: Atmospheric pressure is low

Option C: Atmospheric pressure is high

Option D: None of these

Correct Answer: Atmospheric pressure is low ✔

Option A: Descaling

Option B: Shot blasting

Option C: Pickling

Option D: Skimming

Correct Answer: Pickling ✔

Option A: Very low which prevents their ignition by compression

Option B: Very high which prevents their ignition by compression

Option C: Zero

Option D: None of these

Correct Answer: Very low which prevents their ignition by compression ✔

Option A: Chimney

Option B: Induced draught fan

Option C: Forced draught fan

Option D: Steam jet arrangement

Correct Answer: Steam jet arrangement ✔

Option A: Aluminium

Option B: Stainless steel

Option C: Brass

Option D: Copper

Correct Answer: Stainless steel ✔

Option A: Stiffness

Option B: Malleability

Option C: Creep resistance

Option D: Tensile strength

Correct Answer: Stiffness ✔

Option A: Surface finish

Option B: Fatigue limit

Option C: Creep limit

Option D: Surface cleanliness

Correct Answer: Surface cleanliness ✔

Option A: Nodulising

Option B: Pelletising

Option C: Balling

Option D: Briquetting

Correct Answer: Balling ✔

Option A: V2

Option B: 1/V2

Option C: 1/Vg

Option D: Vg

Correct Answer: Vg ✔

Option A: Suppress martensite transformation

Option B: Enhance its working performance in sub zero atmosphere

Option C: Reduce the retained austenite in hardened steel

Option D: Induce temper brittleness after its hardening

Correct Answer: Reduce the retained austenite in hardened steel ✔

Option A: Suspended salt

Option B: Dissolved salt

Option C: Silica

Option D: Turbidity

Correct Answer: Silica ✔

Option A: α-rays

Option B: β-rays

Option C: Gamma rays & neutrons

Option D: Electrons

Correct Answer: Gamma rays & neutrons ✔

Option A: y2 = 2k1t + k2

Option B: y = k1 ln (k2t + k3)

Option C: y = k1 t + k2

Option D: y = k1t3 + k2

Correct Answer: y2 = 2k1t + k2 ✔

Option A: Machinability

Option B: Density

Option C: Strength

Option D: Plastic deformation

Correct Answer: Strength ✔

Option A: Convection heat transfer by stirring the fluid and cleaning the heating surface

Option B: Conduction heat transfer by reduction in the material thickness and increase in the thermal

Option C: Radiation heat transfer by increasing the temperature and reducing the emissivity

Option D: None of these

Correct Answer: Radiation heat transfer by increasing the temperature and reducing the emissivity ✔

Option A: pH value

Option B: Electrode potential

Option C: Colour intensity

Option D: None of these

Correct Answer: pH value ✔

Option A: 1.5

Option B: 3

Option C: 5

Option D: 7

Correct Answer: 3 ✔

Option A: Upward thrust due to air

Option B: Viscous force exerted by air

Option C: Surface tension effects of water

Option D: Force of gravity

Correct Answer: Viscous force exerted by air ✔

Option A: Tungsten carbide

Option B: High carbon steel

Option C: High speed steel

Option D: Drilling

Correct Answer: Tungsten carbide ✔

Option A: Dry air

Option B: Pure oxygen

Option C: Moisture

Option D: Sunlight

Correct Answer: Moisture ✔

Option A: Increase the heat loss

Option B: Decrease heat loss and will have no effect beyond that

Option C: Decrease heat flux

Option D: Reduce convection heat loss compared to conduction heat less

Correct Answer: Decrease heat loss and will have no effect beyond that ✔

Option A: Nitriding

Option B: Hot dipping

Option C: Electroplating

Option D: Both ‘B’ & ‘C’

Correct Answer: Both ‘B’ & ‘C’ ✔

Option A: Removed by acid pickling

Option B: Hammered into the surface

Option C: Removed with coarse emery cloth

Option D: Left as such to protect the surface

Correct Answer: Removed by acid pickling ✔

Option A: Lead

Option B: Copper

Option C: Aluminium

Option D: Wrought iron

Correct Answer: Lead ✔

Option A: Copper-lead alloys

Option B: Babbitts

Option C: Bronzes

Option D: Cermets

Correct Answer: Cermets ✔

Option A: Plasticiser: increases the polymer strength

Option B: Heat stabiliser: increases the maximum service temperature

Option C: Fillers: Does not affect the property of polymer but increases its weight

Option D: Lubricants: increases the flexibility of polymers

Correct Answer: Fillers: Does not affect the property of polymer but increases its weight ✔

Option A: Close the surface porosity

Option B: Break the continuity of columnar grains

Option C: Flatten the weldment

Option D: Introduce texture in the weld

Correct Answer: Close the surface porosity ✔

Option A: Powder

Option B: Gaseous mixture

Option C: Solution

Option D: Emulsion

Correct Answer: Gaseous mixture ✔

Option A: Classification

Option B: Smelting

Option C: Roasting

Option D: None of these

Correct Answer: Classification ✔