Thermal equivalent of electrical power in practical calculation is _______________ kcal/kWh ?
A. 746
B. 3000
C. 1000
D. 550
Chemical Engineering Basics
Silicon percentage in acid resistant cast iron is about ___________________?
Silicon percentage in acid resistant cast iron is about ___________________?
A. 4
B. 8
C. 14
D. 20
The atmospheric temperature during melting of ice/snow (in the atmosphere)_________________?
The atmospheric temperature during melting of ice/snow (in the atmosphere)_________________?
A. Decreases
B. Increases
C. Remain same
D. May increase or decrease; depends on the altitude where snow melts
_______________ is not a case hardening process ?
_______________ is not a case hardening process ?
A. Carburising
B. Nitriding
C. Cyaniding
D. Annealing
Calorific value of ____________________ are almost same?
Calorific value of ____________________ are almost same?
A. Lignite & anthracite coal
B. Lignite & coal gas
C. Petrol & diesel
D. Coal gas & natural gas
Identify the correct statement with reference to the extractive metallurgy of aluminium ?
Identify the correct statement with reference to the extractive metallurgy of aluminium ?
A. The electrolyte consists of molten Na3AlF6 with approximately 1 to 8% Al2O3
B. Approximately 80% of the aluminium deposited on the cathode comes from cryolite
C. Sodium is deposited along with aluminium, but is immediately vaporised
D. Anode effect sets in when the cryolite concentration goes below 40%.
The main charge in blast furnace is usually___________________?
The main charge in blast furnace is usually___________________?
A. Iron ore & coke
B. Iron ore, coke & air
C. Limestone, coke & iron ore
D. Limestone, sand & iron ore
Speed of a submarine in deep sea & that of an aeroplane is measured by a/an___________________?
Speed of a submarine in deep sea & that of an aeroplane is measured by a/an___________________?
A. Pitot tube
B. Hot wire anemometer
C. Rotameter
D. Stroboscope
Maximum change in the hardness of martensite occurs in the carbon content range of _____________ percent in steel?
Maximum change in the hardness of martensite occurs in the carbon content range of _____________ percent in steel?
A. 0.01 to 0.10
B. 0.2 to 0.4
C. 0.5 to 0.7
D. 0.8 to 1.0
In a drilling process, the metal is removed by both shearing & extrusion. General purpose drills are made of_________________?
In a drilling process, the metal is removed by both shearing & extrusion. General purpose drills are made of_________________?
A. Stainless steel
B. Mild steel
C. High speed steel
D. High carbon steel