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
Exposure to _________________ accelerates the degradation of plastics?
(A) Ultraviolet radiation
(B) High atmospheric temperature
(C) High ambient temperature
(D) Damp atmosphere
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
Production of one ton of paper in Indian paper industry consumes about ____________ kWh of electricity ?
(A) 300
(B) 800
(C) 1400
(D) 2000
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
For grinding of softer materials, the grinding wheel should have _________________ grain size ?
(A) Finer
(B) Coarser
(C) Medium
(D) Any type of
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
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
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
Corrosion rate cannot be lowered by reducing the ________________ of the corroding medium?
(A) Concentration
(B) Velocity
(C) Temperature
(D) None of these