Which of the following is the most important deterrants to an extended use of pulverised coal in boiler firing? Erosion of induced draft fan blades Excessive fly ash discharge from the stack Ash disposal problem Higher power consumption in its transportation TRUE ANSWER : ? YOUR ANSWER : ?
In a heating process, a heat flow diagram in which the quantities of heat in the various items of a heat balance are represented by the width of a band is called the None of these Ostwald chart Cox chart Sankey diagram TRUE ANSWER : ? YOUR ANSWER : ?
Turn down ratio of a burner Should be 1:1 for a batch type furnace. Should be as low as possible i.e., 1 : 2 Is normally much more for a continuous furnace as compared to a batch furnace Is the ratio of maximum to minimum permissible heat input rates TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is a periodic furnace? Tunnel kiln Soaking pit Reheating furnace Rotary kiln TRUE ANSWER : ? YOUR ANSWER : ?
Artificial draught produced by a fan in the furnace can be controlled by the Variation in the pitch of fan blades Speed of the fan Damper All of these TRUE ANSWER : ? YOUR ANSWER : ?
Ostwald charts are meant for Computation of flue gas analysis Computing the excess/deficiency of combustion air None of these Calculation of flue gas temperature TRUE ANSWER : ? YOUR ANSWER : ?
Fuel economy in an industrial furnace operation can not be achieved by the use of Recupterators Combustion air not enriched with oxygen Stoichiometric combustion air Non-preheated combustion air TRUE ANSWER : ? YOUR ANSWER : ?
The purpose of controlling the furnace atmosphere is to prevent surface attack by Oxidation/scaling Sulphur penetration Either of the above Decarburising TRUE ANSWER : ? YOUR ANSWER : ?
Out of the following fuels used in a furnace exhausting flue gas at a temperature of 600°C, the percentage stack loss will be maximum in case of complete combustion of Furnace oil with air Furnace oil with oxygen Blast furnace gas with air Blast furnace gas with oxygen TRUE ANSWER : ? YOUR ANSWER : ?