Related Questions

Which of the following metal is used in making electrical resistance wire for electric furnaces and heating elements?
A Babbitt metal
B Monel metal
C Nichrome
D Phosphor bronze
Which of the following device is best suited for measuring the temperature inside metallurgical furnaces?
A Pyrometer
B Thermocouple
C Thermometer
D Thermistor
Maximum heat transfer in high temperature furnaces is by
A Conduction
B Convection
C Radiation
D Either A, B or C; depends on the type of furnace
Resistance variation method of temperature control is done by connecting resistance elements in
A Series
B Parallel
C Series-parallel connections
D All of the above ways
Which of the following bricks are used for lining of furnaces?
A Over-burnt bricks
B Under-burnt bricks
C Refractory bricks
D First class bricks
Magnesite bricks are used in those parts of furnaces, which are
A Subjected to temperature fluctuation
B Required to resist corrosive basic slag
C Subjected to high load
D None of these
Magnesite refractories are used for the construction of those furnaces, which are
A Not required to resist the corrosive action of basic slag
B Not subjected to fluctuation in temperature
C Used for raising & maintaining high temperature
D Both (B) and (C)
Hearth furnaces are not used for
A Roasting
B Melting
C Reheating
D None of these
Shaft furnaces are used for
A Smelting
B Calcining
C Roasting
D All of the above
By the use of which of the following, high frequency power supply for induction furnaces can be obtained?
A Coreless transformers
B Current transformers
C Motor-generator set
D Multiphase transformer

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