Chemical Engineering Mcqs

Methyl orange indicator turns_____________________?

(A) Orange yellow in alkaline medium
(B) Orange yellow in acidic medium
(C) Colourless in acidic medium
(D) Colourless in basic medium

Submitted By :Ali Uppal

Exposure to _________________ accelerates the degradation of plastics?

(A) Ultraviolet radiation
(B) High atmospheric temperature
(C) High ambient temperature
(D) Damp atmosphere

Submitted By :Ali Uppal

The laminar boundary layer thickness in zero pressure gradient flow over a flat plate along the x-direction varies as x0.5 while the thickness of turbulent boundary layer varies as (where, x = distance from the leading edge) ?

(A) x1.5
(B) x0.8
(C) x-1.5
(D) x-0.8

Submitted By :Ali Uppal

Production of one ton of paper in Indian paper industry consumes about ____________ kWh of electricity ?

(A) 300
(B) 800
(C) 1400
(D) 2000

Submitted By :Ali Uppal

A furnace is made of a refractory brick wall of thickness 0.5 metre and thermal conductivity 0.7 W/m.°K For the same temperature drop and heat loss, this refractory wall can be replaced by a layer of diatomaceous earth of thermal conductivity 0.14 W/m.K and thickness ______________ metre?

(A) 0.01
(B) 0.1
(C) 0.25
(D) 0.5

Submitted By :Ali Uppal

For grinding of softer materials, the grinding wheel should have _________________ grain size ?

(A) Finer
(B) Coarser
(C) Medium
(D) Any type of

Submitted By :Ali Uppal

Consider an ideal solution of components A and B. The entropy of mixing per mole of an alloy containing 50% B is_______________?

(A) R ln 2
(B) -R ln 2
(C) 3 R ln 2
(D) -3R ln 2

Submitted By :Ali Uppal

In case of compression of one kg of air, the work done will be the least, when the value of polytropic index ‘n’ is______________________?

(A) 1
(B) 1.4
(C) 1.5
(D) Y = Cp/Cv

Submitted By :Ali Uppal

The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe) ?

(A) A
(B) D
(C) 1/A
(D) 1/A2

Submitted By :Ali Uppal

Corrosion rate cannot be lowered by reducing the ________________ of the corroding medium?

(A) Concentration
(B) Velocity
(C) Temperature
(D) None of these

Submitted By :Ali Uppal

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