Furnace Technology

1

An improved and fuel efficient version of the pusher type reheating furnace is the __________ furnace.

A. walking beam
B. shaft
C. tunnel
D. rotary hearth

2

Recuperator is

A. not used for fuel gas preheating.
B. an intermittant waste heat recovery equipment.
C. a continuous waste heat recovery equipment
D. heavier than regenerator meant for the same duty.

3

Waste heat from the outgoing flue gases in a thermal power plant is recovered by a/an

A. economiser
B. steam superheater
C. air preheater
D. all (a), (b) and (c)

4

In which of the following furnaces, the gases are sucked through the stock bed from below?

A. Soaking pit
B. Sintering machine
C. Beehive oven
D. None of these

5

In a furnace, the heat taken by the charge/stock and the heat lost to the furnace structure & flue gases depends on the

A. rate of firing and emissivity of flame
B. thermal conductivity of the charge & structural materials of furnace.
C. nature of process ; whether batch, continuous or intermittant
D. all (a), (b) and (c)