A. Heat loss through furnace wall will increase
B. Temperature inside the furnace will fall
C. Temperature on the outer surface of furnace walls will drop
D. Energy consumption will increase
Related Mcqs:
- The temperature inside a furnace is usually measured by which of the following ?
A. Optical pyrometer
B. Mercury thermometer
C. Alcohol thermometer
D. Any of the above - In direct arc furnace, which of the following has high value ?
A. Current
B. Voltage
C. Power factor
D. All of the above - Which of the following devices is necessarily required for automatic temperature control in a furnace ?
A. Thermostat
B. Thermocouple
C. Auto-transformer
D. Heating elements of variable resis-tance material - The material of the heating element for a furnace should have___________?
A. lower melting point
B. higher temperature coefficient
C. high specific resistance
D. all of the above - In a resistance furnace the atmosphere is_____________?
A. oxidizing
B. deoxidising
C. reducing
D. neutral - The electrode of a direct arc furnace is made of____________?
A. tungsten
B. graphite
C. silver
D. copper - In arc furnace the function of choke is______________?
A. to stabilize the arc
B. to imprpve, power factor
C. to reduce severity of the surge
D. none of the above - Ajax Wyatt furnace is started when____________?
A. it is filled below core level
B. it is filled above core level
C. it is fully empty
D. none of the above - Which of the following is an advantage of heating by electricity ?
A. Quicker operation
B. Higher efficiency
C. Absence of flue gases
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. Multi-phase transformer
