Chemical Engineering MCQs

Page No. 401

Optical activity of a solution can be determined using a ___________________?


aPolarimeter

✓


bPolarograph

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cDilatometer

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dRefractometer

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View Answer Polarimeter

Which of the following thermocouples can measure the maximum temperature ?


aPlatinum-rhodium

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bTungsten-molybdenum

✓


cChromel-alumel

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dIron-constantan

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View Answer Tungsten-molybdenum

Emf generated in a thermocouple depends on the temperature ___________________?


aOf cold junction only

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bOf hot junction only

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cDifference between hot and cold junctions

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dDifference between cold junction and atmospheric temperature

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Which of the following filled system expansion thermometer has the capability to measure the lowest temperature ?


aMercury in glass thermometer

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bMercury in steel thermometer

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cAlcohol in glass thermometer

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dFused metal (Na or K) in steel thermometer

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Working principle of mercury in glass thermometer is based on volumetric expansion of mercury with increase in temperature. Which of the following undergoes minimum volumetric expansion for a given temperature change ?


aWater

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bMercury

✓


cMethyl alcohol

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dCarbon-tetrachloride

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View Answer Mercury

Flow rate of those fluids which are insensitive to changes in their density, viscosity or flow velocity profile can be best measured by a ________________?


aMagnetic flowmeter

✓


bPitot tube

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cFlow nozzle type flowmeter

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dTurbine flowmeter

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View Answer Magnetic flowmeter

pH meter has ____________________?


aOne cell

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bTwo cells

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cThree cells

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dNo cell

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View Answer Two cells

Relationship between absorption/evolution of heat at the thermocouple junctions and the current flow in the circuit is given by _____________ effect?Peltier


aPeltier

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bThomson

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cSeebeck

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dNone of these

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View Answer Peltier

Dilatometer is used to measure __________________?


aStress

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bStrain

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cDeflection

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dContraction/expansion due to changes in temperature

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Working principle of disappearing filament type optical pyrometer is based on the ________________?


aWien’s law

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bSeebeck effect

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cKirchoff’s law

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dPeltier effect

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View Answer Wien’s law

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