Chemical Engineering MCQs

Page No. 405

Nitrogen gas constant volume thermometer is suitable for measuring a temperature of _____________ °C?


a0-100


b< 0


c> 100


d> 50


View Answer > 100

In a feed-back control system G and H denote open loop and close loop transfer functions respectively. The output-input relationship is_____________?


aG/(1 + H)


bH/(1 + G)


cG/H


dH/G


View Answer H/(1 + G)

On-off control which is a special case of proportional control, has a band width of about _____________ percent?


a100


b75


c25


d0


View Answer 0

A non-linear system will have _____________ steady state values?


aOne


bMore than one


cTwo


dThree


View Answer More than one

Mcleod gauge is used to measure the __________________?


aPoint velocity


bFlow rate


cVacuum


dPressure


View Answer Vacuum

Change of angle of refraction with composition comprises the working principle of a___________________?


aPolarimeter


bPolarograph


cSpectrometer


dRefractometer


View Answer Refractometer

Working principle of mercury in glass thermometer is based on the ______________ of mercury with increase in temperature?


aIncrease of pressure


bIncrease of thermal conductivity


cVolumetric expansion


dDifferential linear expansion


View Answer Volumetric expansion

What is the overall transfer function (C/R) of the following block diagram if G = G1. G2. G3 and H = H1.H2 ?


a1/(1 + GH)


bG/(1 + GH)


cH/(1 + GH)


dG/(1 – GH)


View Answer G/(1 + GH)

Very low pressure is expressed in microns (μ), which is equal to ____________ mm of Hg column (absolute) at 0°C?


a0.0001


b0.001


c0.01


d0.1


View Answer 0.001

The time constant of a first order process with resistance R and capacitance C is__________________?


aR + C


bR – C


cRC


d1/RC


View Answer RC

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