Furnace Technology
The main function of a muffle in the muffle furnace is to

Neither A nor B
Smooth out temperature inequalities on the combustion side of the muffle wall
Protect the charge from the effects of the products of combustion
Both A & B

ANSWER DOWNLOAD EXAMIANS APP

Furnace Technology
In a furnace employing forced draught as compared to induced draught,

The fan operates hot and hence blades are liable to corrosion and erosion
Positive pressure exists in the furnace
None of these
Air is sucked in, so air leaks are more and hence the furnace efficiency is reduced

ANSWER DOWNLOAD EXAMIANS APP

Furnace Technology
Recuperator is

A continuous waste heat recovery equipment
An intermittant waste heat recovery equipment
Heavier than regenerator meant for the same duty
Not used for fuel gas preheating

ANSWER DOWNLOAD EXAMIANS APP