Which is not a hearth furnace ?
Which is not a hearth furnace ?
A. Glass tank furnace
B. Open hearth furnace
C. Cupola
D. Reheating furnace
Furnace Technology
-
-
Turn down ratio of a burner____________________?
Turn down ratio of a burner____________________?A. Should be as low as possible i.e., 1 : 2
B. Should be 1:1 for a batch type furnace
C. Is the ratio of maximum to minimum permissible heat input rates
D. Is normally much more for a continuous furnace as compared to a batch furnace -
Main gas valve in a gaseous fuel burner is a ______________ valve?
Main gas valve in a gaseous fuel burner is a ______________ valve?A. Gate
B. Butterfly
C. Globe
D. None of these -
Pulverised fuel fired furnaces employ ______________ fuel firing?
Pulverised fuel fired furnaces employ ______________ fuel firing?A. Horizontal
B. Vertical
C. Tangential
D. All A., B. and C. -
Which of the following is a periodic furnace ?
Which of the following is a periodic furnace ?A. Tunnel kiln
B. Rotary kiln
C. Soaking pit
D. Reheating furnace -
Furnace aerodynamics is related to the _____________ in the furnace?
Furnace aerodynamics is related to the _____________ in the furnace?A. Movement of gases
B. Measurement of flue gas volume
C. Temperature control
D. Pressure adjustment -
The heating capacity of muffle furnace depends on the_________________?
The heating capacity of muffle furnace depends on the_________________?A. Surface area & emissivity of the stock
B. Properties of the muffle wall (temperature, area, and emissivity)
C. Both A. & B.
D. Neither A. nor B. -
The heating capacity of muffle furnace depends on the____________________?
The heating capacity of muffle furnace depends on the____________________?A. Surface area & emissivity of the stock
B. Properties of the muffle wall (temperature, area, and emissivity)
C. Both A. & B.
D. Neither A. nor B. -
In salt bath furnace, heat is transferred to the charge mainly by __________________?
In salt bath furnace, heat is transferred to the charge mainly by __________________?A. Conduction
B. Convection
C. Radiation
D. None of these -
An example of shaft furnace is the__________________?
An example of shaft furnace is the__________________?A. L.D. converter
B. Glass melting tank
C. Blast furnace
D. Soaking pit