Chemical Engineering Basics MCQs

Option A: Vapour locking

Option B: Hot starting

Option C: Spark plug fouling

Option D: All A, B & C

Correct Answer: Spark plug fouling ✔

Option A: Blades of gas turbine

Option B: Piston of an I. C. engine

Option C: Flywheel of steam engine

Option D: Cycle chain

Correct Answer: Blades of gas turbine ✔

Option A: High brittleness

Option B: Higher tendency to distort

Option C: High ductility

Option D: None of these

Correct Answer: High ductility ✔

Option A: Viscous force is larger than the inertia force

Option B: Inertia force is larger than the viscous force

Option C: Inertia force is larger than the surface tension force

Option D: Inertia force is larger than the gravitational force

Correct Answer: Inertia force is larger than the viscous force ✔

Option A: Refine coarse grain structure obtained during hot working

Option B: Improve ductility

Option C: Improve yield strength

Option D: Improve mechanical properties

Correct Answer: Improve ductility ✔

Option A: 110

Option B: 85

Option C: 60

Option D: 45

Correct Answer: 85 ✔

Option A: Same

Option B: Slightly less

Option C: Slightly more

Option D: Much more

Correct Answer: Slightly more ✔

Option A: Cu

Option B: Zn

Option C: Fe

Option D: Ni

Correct Answer: Zn ✔

Option A: Linearly

Option B: Exponentially

Option C: Logarithmically

Option D: Inversely

Correct Answer: Linearly ✔

Option A: 5 to 10

Option B: 15 to 25

Option C: 45 to 50

Option D: 75 to 80

Correct Answer: 45 to 50 ✔

Option A: More

Option B: Less

Option C: Same

Option D: Either more or less; depends on the climatic conditions

Correct Answer: Less ✔

Option A: Spheroidising

Option B: Hardening

Option C: Annealing

Option D: Normalising

Correct Answer: Hardening ✔

Option A: Liquid density

Option B: Vapour density

Option C: Temperature difference

Option D: Heat of evaporation

Correct Answer: Vapour density ✔

Option A: Low vapour pressure

Option B: Corrosive nature

Option C: High vapour pressure

Option D: High boiling point

Correct Answer: High vapour pressure ✔

Option A: 80-85

Option B: 60-65

Option C: 40-45

Option D: 20-25

Correct Answer: 60-65 ✔

Option A: Metal changes from liquid state to solid state at freezing temperature

Option B: Solid phase temperature drops from freezing temperature to the room temperature

Option C: Liquid metal temperature drops from pouring temperature to room temperature

Option D: Liquid metal temperature drops from pouring temperature to freezing temperature

Correct Answer: Solid phase temperature drops from freezing temperature to the room temperature ✔

Option A: Fine grains

Option B: Coarse grains

Option C: Homogeneity

Option D: Dissolved elements (except cobalt)

Correct Answer: Dissolved elements (except cobalt) ✔

Option A: Makes it potable

Option B: Makes it non-potable

Option C: Means distillation of water

Option D: None of these

Correct Answer: Makes it potable ✔

Option A: Thinner

Option B: Dryer

Option C: Drying oil

Option D: None of these

Correct Answer: Drying oil ✔

Option A: Compression

Option B: Extrusion

Option C: Shearing

Option D: Both B & C

Correct Answer: Both B & C ✔

Option A: White

Option B: Cast

Option C: Wrought

Option D: Pig

Correct Answer: Wrought ✔

Option A: N2O4

Option B: N2O

Option C: N2O5

Option D: N2O3

Correct Answer: N2O ✔

Option A: Is at rest & has zero viscosity

Option B: Is frictionless

Option C: Fluid layer has no motion relative to an adjacent layer of fluid

Option D: is incompressible & frictionless

Correct Answer: is incompressible & frictionless ✔

Option A: 550-600

Option B: 450-500

Option C: 350-400

Option D: 250-300

Correct Answer: 350-400 ✔

Option A: 10

Option B: 20

Option C: 30

Option D: 40

Correct Answer: 40 ✔

Option A: 0

Option B: 1

Option C: 7

Option D: 14

Correct Answer: 7 ✔

Option A: Re0.5, Re0.8

Option B: Re0.8, Re-0.5

Option C: Re0.8, Re0.5

Option D: Re-0.8, Re0.5

Correct Answer: Re0.8, Re0.5 ✔

Option A: Atoms

Option B: Neutrons

Option C: Nucleons

Option D: Electrons

Correct Answer: Atoms ✔

Option A: Electrode size

Option B: Plate thickness

Option C: Voltage across the arc

Option D: Welded portion length

Correct Answer: Electrode size ✔

Option A: Ammonium phosphate

Option B: Calcium phosphate

Option C: Animal charcoal

Option D: Ammonium sulphate

Correct Answer: Calcium phosphate ✔

Option A: Induced stresses

Option B: Density

Option C: Elastic properties

Option D: Thermal properties

Correct Answer: Elastic properties ✔

Option A: Pressure

Option B: Thermit

Option C: Resistance

Option D: Arc

Correct Answer: Resistance ✔

A. Chromel-alumel
B. Copper-constantan
C. Platinum-platinum rhodium
D. Iron-constantan

Correct Answer: . Platinum-platinum rhodium ✔

Option A: Smelting

Option B: Dressing

Option C: Roasting

Option D: Dressing

Correct Answer: Roasting ✔

Option A: Graphite

Option B: Lead sulphide

Option C: Lead

Option D: Both B. & C.

Correct Answer: Graphite ✔

Option A: Galvanising

Option B: Tinning

Option C: Sherardizing

Option D: None of these

Correct Answer: Sherardizing ✔

Option A: Septic tank

Option B: Oxidation well

Option C: Digestor

Option D: Lagoon

Correct Answer: Digestor ✔

Option A: 6

Option B: 18

Option C: 38

Option D: 52

Correct Answer: 18 ✔

Option A: Partial condensation of steam

Option B: Vibration of the pipeline

Option C: High degree of superheat of steam

Option D: Its exposure to torrential rain

Correct Answer: Partial condensation of steam ✔

Option A: Easily available

Option B: Not soluble in blood at high pressure

Option C: Lighter than nitrogen

Option D: Completely miscible with oxygen

Correct Answer: Not soluble in blood at high pressure ✔

Option A: Pressure falls below the vapour pressure

Option B: Pressure becomes very high

Option C: Temperature becomes low

Option D: All A, B & C

Correct Answer: All A, B & C ✔

Option A: 25

Option B: 35

Option C: 55

Option D: 75

Correct Answer: 55 ✔

Option A: Silver nitrate

Option B: Silver halide

Option C: Calcium silicate

Option D: Metallic silver

Correct Answer: Silver halide ✔

Option A: 9 : 1

Option B: 17 : 1

Option C: 23 : 1

Option D: 29 : 1

Correct Answer: 17 : 1 ✔

Option A: Carbon monoxide

Option B: Carbon dioxide

Option C: Nitrogen

Option D: Ozone

Correct Answer: Carbon dioxide ✔

Option A: Fire-fighting

Option B: Cooling

Option C: Drinking

Option D: Evaporation to produce steam

Correct Answer: Drinking ✔

Option A: Normalising

Option B: Tempering

Option C: Annealing

Option D: Carburising

Correct Answer: Normalising ✔

Option A: Length of the pipe

Option B: Diameter of the pipe

Option C: Density of the fluid

Option D: Velocity of the fluid

Correct Answer: Length of the pipe ✔

Option A: Cold

Option B: Work

Option C: Age

Option D: Induction

Correct Answer: Work ✔

Option A: Borosilicate

Option B: High silica

Option C: Supermax

Option D: Lead

Correct Answer: Supermax ✔

Option A: 1/k

Option B: k

Option C: k2

Option D: 1/k2

Correct Answer: k ✔

Option A: Relative humidity increases

Option B: Dew point remains constant

Option C: Dry bulb & wet bulb temperature increases

Option D: Both B & C

Correct Answer: Both B & C ✔

Option A: Decreases but dew point remains constant

Option B: Increases but dew point remains constant

Option C: Increases & the dew point decreases

Option D: Decreases & the dew point increases

Correct Answer: Increases but dew point remains constant ✔

Option A: Reduce the speed

Option B: Obtain variable speed

Option C: Increase the speed

Option D: Produce high torque

Correct Answer: Obtain variable speed ✔

Option A: Charcoal

Option B: Calcium carbide

Option C: Hydrocarbon oil

Option D: Graphite

Correct Answer: Charcoal ✔

Option A: Boiler

Option B: Condenser

Option C: Evaporator

Option D: All A. B. & C.

Correct Answer: Condenser ✔

Option A: 70 & 30

Option B: 30 & 70

Option C: 50 & 50

Option D: 90 & 10

Correct Answer: 70 & 30 ✔

Option A: Forging

Option B: Cold rolling

Option C: Hot rolling

Option D: Casting

Correct Answer: Cold rolling ✔

Option A: 5

Option B: 15

Option C: 30

Option D: 45

Correct Answer: 5 ✔

Option A: Evaporative capacity

Option B: Evaporation efficiency

Option C: Thermal efficiency

Option D: Steam load

Correct Answer: Evaporative capacity ✔

Option A: Mass

Option B: Volume

Option C: Surface area

Option D: All A, C & C

Correct Answer: All A, C & C ✔

Option A: Gear

Option B: Centrifugal

Option C: Reciprocating

Option D: Plunger

Correct Answer: Centrifugal ✔

Option A: Add alloying elements

Option B: Prevent electrode from contamination

Option C: Stabilise the arc

Option D: Provide protective atmosphere to weld

Correct Answer: Prevent electrode from contamination ✔

Option A: Abrasion resistance

Option B: Toughness

Option C: Red hardness

Option D: Cutting speed

Correct Answer: Toughness ✔

Option A: Soft ferrites

Option B: High purity iron

Option C: Grain oriented Fe-Si alloy

Option D: Al-Ni-Co alloy

Correct Answer: Grain oriented Fe-Si alloy ✔

Option A: 87% cementite & 13% Fe

Option B: 87% ferrite & 13% cementite

Option C: 93.33% ferrite & 6.67% C

Option D: 87% ferrite & 13% C

Correct Answer: 87% ferrite & 13% cementite ✔

Option A: Normalising

Option B: Annealing

Option C: Tempering

Option D: Hardening

Correct Answer: Annealing ✔

Option A: Mach

Option B: Reynolds

Option C: Froude

Option D: Weber

Correct Answer: Froude ✔

Option A: Ferrous

Option B: Ceramic

Option C: Cemented carbide

Option D: Non-ferrous cast alloy cutting tool

Correct Answer: Non-ferrous cast alloy cutting tool ✔

Option A: Nickel

Option B: Cobalt

Option C: Vanadium

Option D: Platinum

Correct Answer: Platinum ✔

Option A: The continuous adjustment of the set point index of an automatic control loop by a primary(master) controller

Option B: Used when changes in process conditions cause serious upsets in the controlled variable

Option C: Useful to control flow from temperature

Option D: All A, B & C

Correct Answer: All A, B & C ✔

Option A: 30,000 J

Option B: 60,000 J

Option C: 90,000 J

Option D: 2,40,000 J

Correct Answer: 90,000 J ✔

Option A: Above the highest

Option B: Above the lowest

Option C: Between the first & second

Option D: Between the second & third

Correct Answer: Above the lowest ✔

Option A: Slip

Option B: Fracture

Option C: Winning

Option D: Dislocation

Correct Answer: Dislocation ✔

Option A: Weight

Option B: Number

Option C: Volume

Option D: Radius

Correct Answer: Number ✔

Option A: Tempering

Option B: Annealing

Option C: Normalising

Option D: Carburising

Correct Answer: Carburising ✔

Option A: Hot temper

Option B: Hot hardness

Option C: Fatigue

Option D: Creep

Correct Answer: Hot hardness ✔

Option A: Work is done

Option B: Heat transfer takes place

Option C: Mass flow occurs across the boundary of the system

Option D: No chemical reaction takes place within the system

Correct Answer: No chemical reaction takes place within the system ✔

Option A: CaF2

Option B: Ca3(PO4)2

Option C: CaCO3

Option D: CaCl2

Correct Answer: Ca3(PO4)2 ✔

Option A: Molybdenum

Option B: Chromium

Option C: Tungsten

Option D: Vanadium

Correct Answer: Molybdenum ✔

Option A: Providing support for the tubes

Option B: Improving heat transfer

Option C: Both A & B

Option D: Preventing the fouling of tubes & stagnation of shell side fluid

Correct Answer: Both A & B ✔

Option A: Waiting

Option B: Idle

Option C: Inspection

Option D: Tool replacement

Correct Answer: Waiting ✔

Option A: Malleable

Option B: Nodular

Option C: Ductile

Option D: Grey

Correct Answer: Malleable ✔

Option A: Increase

Option B: Decrease

Option C: Remain same

Option D: May increase or decrease; depending on the type of metal

Correct Answer: Decrease ✔

Option A: Increases the reducing potential of the gas

Option B: Increases the flame temperature

Option C: No significant change occurs

Option D: Increases the hydrogen content in the metal

Correct Answer: Increases the reducing potential of the gas ✔

Option A: Wrought iron

Option B: Pig iron

Option C: Cast iron

Option D: None of these

Correct Answer: Cast iron ✔

Option A: 768

Option B: 1127

Option C: 1359

Option D: 1480

Correct Answer: 1127 ✔

Option A: <100

Option B: >100

Option C: About 273

Option D: About 373

Correct Answer: >100 ✔

Option A: Grey

Option B: Black

Option C: Opaque

Option D: White

Correct Answer: Grey ✔

Option A: 1 kg/cm2

Option B: 1 bar

Option C: 1 atmosphere

Option D: 1 kilo Pascal

Correct Answer: 1 atmosphere ✔

Option A: High vacuum

Option B: Zero pressure

Option C: 0°K

Option D: Earth’s centre

Correct Answer: Zero pressure ✔

Option A: Less

Option B: More

Option C: Equal

Option D: Unpredictable

Correct Answer: Less ✔

Option A: Fatigue strength

Option B: Creep strength

Option C: Resilience

Option D: Endurance limit

Correct Answer: Endurance limit ✔

Option A: 75°C

Option B: 373°K

Option C: 150°C

Option D: Room temperature

Correct Answer: 373°K ✔

Option A: 2-5

Option B: 18-20

Option C: 12-15

Option D: 6-12

Correct Answer: 2-5 ✔

Option A: Elastic limit

Option B: Ultimate tensile strength

Option C: Young’s modulus

Option D: Endurance limit

Correct Answer: Endurance limit ✔

Option A: Half

Option B: One third

Option C: One and half times

Option D: One fourth

Correct Answer: One and half times ✔

Option A: Increasing its cross-sectional area of flow

Option B: Passing it through a pressure reducing valve

Option C: Forcing it downwards through a vertical tube

Option D: None of these

Correct Answer: Passing it through a pressure reducing valve ✔

Option A: Nitrogen oxides

Option B: Hydrocarbons

Option C: Both A. & B.

Option D: Carbon monoxide

Correct Answer: C. Both A. & B. ✔

Option A: Is an electrical insulating material

Option B: Of low resistivity is preferred

Option C: Should have high thermal conductivity

Option D: Need not defy the corrosive action of chemicals

Correct Answer: Is an electrical insulating material ✔