- (A) Oxidising
- (B) Reducing
- (C) Inert
- (D) Decarburising
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- (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
- (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
- (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
- (A) Sankey diagram
- (B) Cox chart
- (C) Ostwald chart
- (D) None of these
- (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
- (A) Conduction
- (B) Natural convection
- (C) Radiation of heat from the roof of the combustion chamber
- (D) None of these
- (A) Glass melting furnace
- (B) Open hearth furnace
- (C) By product coke ovens
- (D) All
- (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
- (A) Supply of excess fuel
- (B) Supply of excess air
- (C) Burning carbon monoxide and other incombustible in upper zone of furnace by supplying more air
- (D) None of these
