A. 60 – 100
B. 400 – 700
C. 1200 -1500
D. 2000 – 2300
Related Mcqs:
- Production of one ton of paper in Indian paper industry consumes about ____________ kWh of electricity ?
A. 300
B. 800
C. 1400
D. 2000 - The refractory lining of the bottom in a basic electric arc furnace is made of___________________?
A. Silica
B. Alumina
C. Magnesia
D. Fireclay - Electrolytic reduction cell used for conversion of calcined Al2O3 to Al is a carbon lined furnace operating at 800-900 °C. The purpose of electric current supplied to the furnace is to___________________?
A. Achieve very high purity of aluminium (99.9%)
B. Keep the electrolyte in liquid condition by the generation of heat
C. Electrolytically dissociate alumina
D. Both B. & C. - Thermal equivalent of electrical power in practical calculation is _______________ kcal/kWh ?
A. 746
B. 3000
C. 1000
D. 550 - Steel containing low percentage of nickel, chromium & tungsten are termed as the _____________ steel ?
A. Wrought
B. Tool
C. Alloy
D. Plain carbon - The ‘transition temperature’ for ductile to brittle behavior of steel increases with increase in the _____________ content in steel?
A. Carbon
B. Manganese
C. Both A nor B
D. Neither A nor B - One face of a furnace wall is at 1030°C and the other face is exposed to room temperature (30°C). If the thermal conductivity of furnace wall is 3 W. m-1. k-1 and the wall thickness is 0.3 m, the maximum heat loss (in W/m) is____________________?
A. 100
B. 900
C. 9000
D. 10000 - Basic open hearth furnace (BOF) is not used for producing ______________ steel?
A. Killed
B. Rimming
C. High alloy
D. None of these - The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is ______________ BTU/hr?
A. 100
B. 200
C. 1000
D. 2000 - One ton of refrigeration is not equivalent to the heat removal rate of ____________________?
A. 200 BTU/minute
B. 50 kcal/minute
C. 50 kJ/sec
D. 3.5 KW
