Ceramic recuperators compared to metallic recuperators for the same duty_________________?

Question: 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
[A].

furnace oil with air.

[B].

furnace oil with oxygen.

[C].

blast furnace gas with air.

[D].

blast furnace gas with oxygen.

Answer: Option C

Explanation:

No answer description available for this question.

Question: An electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called __________ furnace.
[A].

resistance

[B].

arc

[C].

low frequency induction

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: If the flame is produced under the hearth and then sweeps up into the heating chamber, this is called a/an __________ furnace.
[A].

sidefired

[B].

underfired

[C].

covered

[D].

recirculating

Answer: Option B

Explanation:

No answer description available for this question.