Chemical Engineering MCQs

Page No. 771

______________ the exhaust gas is an indication of the incomplete combustion of fuel?


aLow temperature of


bHigh temperature of


cHigh % of CO in


dHigh % of CO2 in


View Answer High % of CO in

Which of the following terminology is used for the temperature at which new grains are formed in a metal ?


aEutectic temperature


bLower critical temperature


cRecrystallisation temperature


dUpper critical temperature



In ________________ process, there is an increase in entropy with no degradation of energy ?


aIsothermal expansion


bIsochoric heat addition


cPolytropic expansion


dIsobaric heat addition


View Answer Isothermal expansion

Air-petrol ratio in an automotive petrol engine is around ________________?


a14 : 1


b22 : 1


c25 : 1


d4 : 1


View Answer 14 : 1

____________ is the process used for setting up compressive stresses in the surface of a metal to improve its fatigue strength ?


aLancing


bShot peening


cSlugging


dSpinning


View Answer Shot peening

Which of the following has the highest modulus of elasticity (about 7 × 106 kg/cm2) ?


aHigh speed steel


bStainless steel


cTungsten carbide


dSuperalloys


View Answer Tungsten carbide

Pick out the wrong conversion of absolute & kinematic viscosities ?


a1 stoke = 1 cm2/sec


b1 N.sec/m2 = 10 paise


c1 stoke = 1 m2/sec


d1 m2/sec = 104 stokes


View Answer 1 stoke = 1 m2/sec

The stress at which extension of the material takes place more rapidly as compared to the increase in load is termed as the _____________ point of the material?


aElastic


bUltimate


cYielding


dBreaking


View Answer Yielding

An approximately _____________ process exemplifies the flow of a gas through a very long pipe of uniform cross-section ?


aAdiabatic


bIsothermal


cIsentropic


dIsochoric


View Answer Isothermal

Which of the following are made out of the carbon steel having carbon content of 0.9 to 1%?


aSmall punches, broaches reamers and springs


bCutlery, screws, rivets and files


cMandrels, twist drills, small lathe tools and razors


dForgings like can shaft, structural steel plate, threading dies and drawing dies



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