R

Ram Sharma • 193.86K Points
Coach 

Q. A coal with high ash content is undesirable, as

(A) It is abrasive to the coal pulveriser (ie.g. ball mill) and the combustion chamber
(B) The ash in molten condition gets absorbed in the pores of the refractory lining of the furnace and causes its spalling due to different co-efficient of expansion/contraction of the refractory and the ash
(C) The ash retains the sulphur & phosphorus and thus affects the quality of products in metallurgical furnace apart from increasing the slag volume. Besides, it may fuse and stick to the boiler tubes thereby reducing the heat transfer
(D) All of the above
Share

No solution found for this question.
Add Solution and get +2 points.

You must be Logged in to update hint/solution

Discusssion

Login to discuss.

Loading Comments....

Related MCQs

Q. The diameter of a propeller agitator used in agitation tank ranges from __________ percent of the tank diameter and its peripherial speed is normally

Q. A compact estimate about the amount of materials handling between various work stations is obtained from the

Q. Which of the following does not come under the sales expenses for a product of a chemical plant?

Q. The absorption factor is defined as (where, S1 = slope of the equilibrium curve, S2 = slope of the operating line)

Q. Furfural solvent extraction is used for upgrading (by dissolving aromatics)

Q. For maximum discharge through a chimney, its height should be

Q. The temperature of tempering oil baths maintained at 400°C during heat treatment of steel is measured by a/an __________ thermocouple.

Q. Which of the following is directly concerned with psychrometry?

Q. Heat transfer by conduction results due to the transfer of free electrons, kinetic energy & vibrational energy from one molecule to another. Conductio

Q. In a homogeneous nuclear reactor, the __________ are mixed together.

Question analytics