If the flame is produced under the hearth and then sweeps up into the heating chamber, this is called a/an ______________ furnace?
(A) Sidefired
(B) Underfired
(C) Covered
(D) Recirculating
_____________ atmosphere is maintained inside an iron blast furnace?
(A) Oxidising
(B) Reducing
(C) Inert
(D) Decarburising
Pick out the wrong statement?
(A) A fluid mass is free from shearing forces, when it is made to rotate with a uniform velocity
(B) Newton’s law of viscosity is not applicable to the turbulent flow of fluid with linear velocity distribution
(C) Laminar flow of viscous liquids is involved in the lubrication of various types of bearings
(D) Rise of water in capillary tubes reduces with the increasing diameter of capillary tubes
Pick out the wrong statement?
(A) The eddy viscosity is a function of the type of turbulence involved
(B) The eddy viscosity is a fluid property
(C) The viscosity of gas increases with increase in temperature
(D) The viscosity of a liquid increases with decrease in temperature
Pick out the correct statement pertaining to Venturimeter ?
(A) A Venturimeter with a fixed pressure drop discharges more, when the flow is vertically downward, than when the flow is vertically upward
(B) The co-efficient of contraction of a Venturimeter is always unity
(C) For a fixed pressure drop, the discharge of a gas through a Venturimeter is greater, when compressibility is taken into account, than when it is neglected
(D) None of these
Which one shows the diagrammatic heat balance in a furnace ?
(A) Sankey diagram
(B) Cox chart
(C) Ostwald chart
(D) None of these
Pick out the correct statement?
(A) Human blood is a Newtonian fluid
(B) A Newtonian fluid obeys Newton’s law of cooling
(C) For a non-Newtonian fluid, a straight line passes through the origin in a plot between shear stress and shear gradient
(D) Thin lubricating oil is an example of a non-Newtonian fluid
In reverberatory furnace, charge is heated mainly by__________________?
(A) Conduction
(B) Natural convection
(C) Radiation of heat from the roof of the combustion chamber
(D) None of these
Regenerators are normally provided in the____________________?
(A) Glass melting furnace
(B) Open hearth furnace
(C) By product coke ovens
(D) All
Pick out the wrong statement ?
(A) Electrical conductivity of refractory is not important, when these are to be used in electrical furnaces
(B) Graphite and metals are the good electrical conductor among the refractories and others are all electrical insulators
(C) Refractories used for lining electrical furnaces should ordinarily have very low electrical conductivity
(D) Electrical conductivity of porous refractory material is low